,'

a .ft~~±.1W~~-~· ic.1JTransactions and Proceedingsof thePalaeontological Society of Japan
New SeriesNo. 24

Palaeontological Society of Japan
October 31, 1956

CONTENTS
TRANSACTIONS

Page

298. On the Miocene Pectinidae from the Environs of Sendai; Part 9, On
Pecietz (Clzlamys) miyatokoetzsis NoM.PRA and HATAI...Koichiro MASUDA 247
299. Toriyamaia, A New Permian Fusulinid Genus from the Kuma Massif,
Kyushu, Japan ...................................................... Kametoshi KANMERA 251
300. Fusulinids from the Limestone Conglomerate in the Yagooki Valley,
Tamanouchi, Hinode-mura, Nishitama-gun, Tokyo-to, Japan ............. ..
... ... ... ... ... ... ... ... ... ... ... .. . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... Sumio SAKAGAMI 259
301. On Some New Glycymerid Molluscs from Japan ............ Saburo KAsso 267
302. On Fossil Diatoms from the Oil-Shale of Yoshioka Formation in theSouthwestern Part of Hokkaido, Japan ............................... Kci OsmTE 273
I

303. Miscellaneous Notes on the Cambro-Ordovician Geology and Palaeontology, XXVI. Supplementary Notes on the Cambrian Trilobites fromSoutheastern Asia .................................................. Teiichi KonA YASHI 277
304. A Miocene Siego/oplzodon from Yatuo Group in Toyama Prefecture ...
.. . .. . ... . .. . . .. . .. . .. . ... .. . .. . .. . ... . . .. . .. . ... Tokio S111KAMA and Yoshihiro KtRll 285
PUBLICATIONS RECEIVED (16) ............................................................... 258
PROCEEDINGS .......................................................................................... 266
Systematic Index ... ... .. . ... ... .. . .. . ... .. . ... .. . .. . .. . .. . .. . .. . ... .. . ... .. . .. . .. . ... .. . .. . .. . 290
Index of Fossils ................................................................................. 292

President:

Hisakatsu YAIIE

Councillors:

Kiyoshi AsANO, Riuji

E~oo(Business and Accountant), Seido

ENoo, Haruyoshi Fum.toTo (Publication), Shoshiro HAszA WA, Kotora
HATAI, Ichiro HAYASAKA, Nobuo lKEBE, Teiichi KoBAYASHI (Editor), Jirol\1AKIYAJ\IA, Tatsuro MATSUMOTo, l\lasao MtSATo, Tokio SHIKAMA, Fuyuji
TAKA! (General Affairs), Hisakatsu YAuE.

All Communications relating to this Journal should be addressed to the
PALAEONTOLOGICAL SOCIETY OF JAPAN
Geological Institute, Faculty of Science, University of Tokyo, Japan

Trans Proc. Palaeont. Soc. Japan, N. S., No. 24·, pp. 21·7-250, Pl. 35. Oct. 31, 1956

298. ON THE MIOCENE PECTINIDAE FROM TI-lE ENVIRONSOF SENDAI; PART 9, ON PECTEN (CHLAMYS)MIYATOKOENSIS NOMURA AND HATAF
KCJICHIRC) M/\SUD/\
Dep:trtment of Geology. College of r'.rlucation, Tohol;u University. Semlai

f!lii!'f>Hili:t:P~~ Pectinidae; /ell) 9.

Pecten (Ch/amys) miyatoko:•ttsis NoMliR.\ and HAT AI\.::-:>\ ·"C : a'.!J,tl!i4:~Jllil1i*;f;I!Pif#1':V')f\.:ij:\:JtfltJ. ~.fj1~ U.:.~~o7:l.~:<l>:O:dl1tid L -c~~lllftFJ~~Jtttfcf.f\ ·.
1l!:!RllC.v:>[.lklf*;::."?l, ·"C~t:t..:oP;iJ;If:_,

rn

In this article is treated Pecten ( Clzlamys) miyatolwensis Nm.rillu and H.\T.\1
which was described from the 6tsutsumi
formation at Otsutsumi, Yamato-machi,
Kurolmwa-gun, and its subspecies matu·
mori from the Nanakita formation at
Matsumori. Izumi-mura. lVliyagi-gun.
both in Miyagi Prefecture, in the northern border of Sendai City.
Many specimens of the species werecollected from the type locality and a
few from the Utsuno formation (Suon,
1954) at Sabusawa, IVliyazaki-machi,
Kami-gun, l'v1iyagi Prefecture, by thewriter. Based upon these and otherspecimens, a redescription of the characters of this species and its relationshipwith certain others mentioned in thisarticle are presented herein. The collections preserved in the Department of
Geology, College of Education, in theInstitute of Geology and Paleontology,
Faculty of Science, both of the Tohoku
University and of the Saito I·lo-on Kai
Museum, all in Sendai City, were studiedin connection with this species.
Acknowledgements are due to Dr.

rm

1\.otora HATAI of the Department of
Geology, College of Educaticn, Tohoku
University, for kindly supenising thepresent \Vork.
Family Pectinidae
Subfamily Pcctininae
Genus Chlamys (BoLTE:-:) RiiniNC, 1798
Clzlamys miyatokoeusis (No;--mR,\ andHAT AI)Pl. g-;, Figs. la-b, 2a-b, 3-8. 9a-b.
19:{6. Pecten ( C hlamys) miyatokne11sis NnMtlR A

and lL\T.'d, Saito Ho-on 1\ai Mus .. Rrs
Bull., No. 13, p. 127, pl. 19. figs. 2 4.
pl. 20. fig. 1.

The specimens collected from the type
locality may be redescribed as follows:
Shell rather small in size, rather thin.
compressed, orbicular, equilateral except
for amicles; left valve a little moreconvex than right: both valves radiately
ribbed. and forming an angle of about
90" at apex.
Right valve with numerous (about 23
main ribs), finely scaled radial ribs andfinely scaled intercalary threads; radialribs on about central part of disc nearly
equal to or a little wider than their* Read c.t the 62 nd meeting of the Society atTokyo. Oct. 29. 1955; received Oct. 29, 1955.
247

Koichini lVfASUDA

248

interspaces in breadth, and divided into
three or rarely four parts by shallow
longitudinal furrows at upper half ofdisc; divided threads subequal and finely
scaled, sometimes radials bifurcate at
upper half of disc, and remains usuallydivided into two parts by a furrow orrarely undivided; submargins sculptured
with numerous, fine, finely scaled undivided rad·ial ribs, in which radials on
the posterior side continue to the posterior auricle ; intercalary threads usually
two or three, in which primary intercalary threads usually appear near the be:1k
and nearly equal to or a little less thanthe divided radial threads of the mainradial ribs in strength near the ventral
margin, secondary riblets appear atabout upper half of disc and tertiary
ones ncar the ventral margin; anteriorauricle much larger than the posteriorand sculptured with several, imbricated,

Right

Right

Right

Left

Left

Left

Height

62.9

47. 7

48.6

61.2

44.8

ca.48.0

Lengthca.59.0

IB.5

45.0

60.7

40.8

48.0

Hinge-length

27.4

19.0

18.4

27.4

17.0

ca. 19.0

Depth

12.3

8.6

11.3

14.4

9.6

1o._s__

goo

goo

85°

goo

90°

goo

Valve

11

distinct radial threads and concentriclines, and furnished with deep byssal
notch and more or less narrow byssal
area; posterior auricle tnmcated behindwith obtuse angle, and sculptured withmore or less numerous, imbricated fineradial threads; hinge with distinct cardinal crura, more or less indistinct
ctenolium, and shallow resilial pit withmore or less distinct lateral ridges:
hinge plate rather flat and wide withslight fold, and sculptured with finestriae parallel to the hinge in the full
adult specimens, but in the younger
shells w·ith no hinge plate. Left valve
almost similar to the right valve in
sculpture, except for the obtuse networkon the disc of left valve, but in younger
shells the radial ribs near the beak alittle elevated, and much narrower thanthe·ir interspaces. Interior surface smooth, but with fine marginal serration.
Dimensions (in mm.):--- -Apical angle

Remarks:- This species is characterized
by its rather small. orbicular and subequi\'alve shelL numerous, densely scaled,
low radial ribs which are divided into
three subequal parts by longitudinalfurrows, two or three finely scaled
intercalary threads, larger anterior auricle sculptured with imbricated anddistinct radial threads and concentriclines; furnished with deep byssal notchand more or less narrow byssal area,

1much smaller posterior auricle sculptured with imbricated fine radial threads,·indistinct ctenolium, fine marginal serration, rather wide hinge plate ornamented by fine striae parallel to thehinge in full adult specimens, and left
valve with sculpture almost similar to
the right valve.
The subspecies matumori described by
S. NoMURA and K. HATAJ (1936, p. 129,
pl. 20, fig. 11) from the lowermost part

On the J\Iiocene Pectinidae from the Environs of Senclai; Part 9of the Nanakita formation at Matsumori
is said to differ from miyatokoensis by
the fewer radial ribs (about ten) andslightly more distinct main ribs. According to the writer's examination of
the type specimen. the following features
must be added : the majority of theradial ribs consist of a set of two mainradial ribs. and the interspace between
the main radials of a pair is somewhat
deep and narrow ; intcrspaces between
the pair are much narrower than tlw
pair itself and more or less deep; thenumber of nmin radial ribs are almost
similar to miyatokoe11sis, though S. Nor.n:RA and K. HATAI pointed that the
number of radial ribs are fewer than
miyatolwcusis by counting the pairedradial ribs as one.
This species resembles Cltlamys lwucharai (Yol\llYAMA) (YoKOY Al\·IA, 1926,
p. 135, pl. 18. fig. 1, pl. 19. figs. 1, 2. 5-7)
in general features. The characteristicsof the hinge are other differences between kanchanti and the present one asalready pointed by S. Nom!R,\ and K.
HATAI (1937, p. 128). This species isalso related to Clztamys lzcricius (Gom.D)( AR:-<OLI>, 1906, p. 110. pl. 43, figs. 3. 3a)as also pointed by S. Nm.rimA and K.
HATAI, which occurs as Recent in the
Northern Pacific ami as fossil in theupper l\Hocene, Pliocene and Pleistocene
formations of California, but it differs
therefrom in having a larger shell,
divided radial ribs in which the middle
part is most prominent, and several
intercalary threads in the interspaces
between the radial ribs.
At the type locality of 6tsutsumi in
the northern border of Sendai, many
specimens of this species were collectecl
from a granule conglomerate cemented
by tuffaceous sand or conglomeratic
tuffaceous very coarse-grained sandstone.

2.J9

Here. abundant and intact valves aremost common, as already noticed by
M. NAKAl\HJRA (1940, pp. <i-7), but manyof the specimens are slightly or severely
deformed. The associated fauna of thisspecies are not always deformed, therefore, the writer considers that the shellsof the present species nrc probably
easily deformed.

A1iyatokocnsis has been known tooccur in the 6tsutsumi and Utsuno formations in 1\1iyagi Prefecture. and fromthe Ginzan formation at the Ginzan Hot
Spring. Obanazawa-machi. Kita-Murayama-gtm. Yamagata Prefecture. Though
S. Nmti.rRA and K. 1-IA'L\t reported on
occurrence of miyatokoensis matumorifrom the Nanakita formation at Matsumori. Izurni-rnura, Miyagi-gun Miyagi
Prefecture, the writer fai!C'd to colle~t
it from the same local-ity. The geological age of these formations are all
Miocene. and the range of this species
is considered to be Early l'v1ioccne.
As noticed in early J-ines, the present
species is closely related to C/llamys
hcricius ( Gom.o ). and the former isrestricted in the Early Miocene formation of the Northeastern Japan, thelatter is known as fossil from the upperl\Hocene Santa Margarita formation,
and Pliocene and Pleistocene formationsof Californ·ia and as Recent in the Northern Pacific. According to 1{. AR:--;ow(1906, pp. 110-111,) the fossil shells ofhericius are on the average smaller andappear to have slightly more scaly
secondary riblets than the hving species.
Jl.fiyatokoe11sis is on the average smallin size. and it may be the ancestralform of Clllamys hcricius CGour_n), but
further materials are necessary tc settle
this problem.

250

Ki>ichirii MASUDA
Japan. Saito Ho-on Kai Mus.. Res. Bull..
13, pp. 127-129, pl. 19. fig:>. 2-4, pl.
20. figs. 1. 11.
- - and ZINllO. N. (1935), On S:m1e Neogene
1\lollusca from Yamagata Prefecture, Northea:;t Honsyu, Japan. Pt. .1. List of
the Miocene Fossils from the Vicinity of
the Ginzan Hot Spring, Northwestern
Slope of the Hunagata Volcano. Ibid .. pp.
155-157.
SHOJI. R. (1954), On the Gaology of Yakurai·zan. Sanbongi-machi and its environs,
Iv1iyagi Prefecture. Miyagi -ken ShOko-bu,
pp. 1-28, 1 map.
YnKoY AI\! A, M. (1931 ), Tertiary l\Iollusca
from Iwaki. four. Fnc. Sci., Imp. Univ.
Tokyo. Sec. 2, Vol. 3, Pt. 4, p. 203. pl. 13.
l{o.

References
i\RNOI.D, R. (1906). The Tertiary and Quater-nary Pecte11s of C:tlifornia. U. S. Gcol. Sun• ..
Prof. Paper, No. 47, pp. 110-111, pl. 43,
figs. 3, 3a.
NM<AMURA. M. (19-10). On Some Peclinidae
Fossils from the l\1iocene Deposits of theTomiya Block. l\1iyagi·ken, Northeast
Honsyu, Japan. Japan. jour. Ceo!. Gcogr.
Vol. 17, Nos. 1-2. pp. 1-15.
NoMUI<A. S. and HA'L\1, K. (1936). A
List of the l\'liocene l\Iollusca and Brach·ioporls collected from the Region lying
North of the Nanakita River in lhe
Vicinity of Sell(lai, Rikuzen Province,

Explanation of Plate 35
Ch/amys miyalokoeusis (Nnl\'IURA and HATAI)(Natural size)
Figs. la-b. a. Right valve. b. Hinge area of Ia. DGS. Reg. No. 2122. Loc. Otsutsumi. Yamatomachi, Kuroka,va-gun, l\·iiyagi Prefecture.
Figs. 2a-b. a, Right valve. b. Left valve. DGS, Res. No. 2122. Loc. Same as above.
Fig. 3. Right valve. DGS. Reg. No. 2122. Loc. Same as above.
Figs. 4-6. Left valve. DGS. Reg. No. 2122. Loc. Same as above.
Fig. 7. Hinge area of left valve. DGS. Reg. No. 2122. Loc. Same as above.
Fig. 8. Deformed right valve. DGS. Reg. No. 2124. Loc. Same as above.
Figs. 9a-b. a. Right valve. h. Hinge area of 9a. DGS. Reg. No. 2124. Loc. Same as above.

K. MAsUDA : Miocene Pectinidae

K. KuMAGAI, Photo

Plate 35

Trans. Proc. Palaeonl. Soc. japau. N. S .. No. 21. pp. 251-257. 1'1. 36. Oct. 31. 1956

299. TORIYAMAIA, A NEW PERMIAN FUSULINID GENUS
FROM THE KUMA MASSIF, KYUSHU, JAPAN*
KAMETOSHI KANMERA
Dt!partment of Geology, Kyushu University. Fukuoka=1'Lff.C~Ji~!h~,!!ii, Toriyamaia: i'!~:$:l!r~AftWf±! / ffijlc.Ji'iiJ / n1P')Iru 'fll;:,1>.ij\ll!-'d':itt:l.l~m:.:.j!Will i' ~ 'J ·rb::J!r'i <=jr/;*tflffii~Tm~!llj;) ~~PJ):f.iY·d'i~i.:. 1J ·ff'l1>tJiW!h·tli!m?: Jt.HI L t.:o -t.ttliYJJ~I:. Lei'lla
DUNB,\R & SKINNER <7)-=t·~t-i.:.D:,tt..::filt;i1i{d, i:.). [1\i/[~·('(t Rauserel/a DliNII/,R o:>.f:lt-l.:.mf!;( L. fiLj
/A\o:>tNilJ!UiO):]'!j1ltr>b....,.CI. ·6 0 . : . : ;.:. Toriyamaia C.~-::H-t. T. laxiscptata sp. nov. 'tr~Alli!C.
VO:'.tx-r~o 'ffi~lt"Hui£;7)

2 .W,J: 'J.!f'.J!.JH.:l±W~'-· !*ft\:lt=:~~rffilili:C.;IJ;t~..).tl~,
W1*1~

Introduction

There is a particular group in the:su!Jfamily Ozawainellinae THoMPsuN &FosTER, wh·ich comprises Leella Du:-:r:.-.I<& SKIXNF.R and Rauscrella D~l:O:IIAR,
having a long axis of coil·ing and rather
loosely coiled shell. In addition to theabove two genera previously known, asimilar small fusuhnid probably belonging to this group is described here as a
new genus Tvriyamaia, with T. laxiscptata, sp. nov., as the type species.
This new form of fusulinid was obta·ined from a limestone pebble in a conglomeratic bed with isolated pebbles ofvarious rocks in sandy shale matrix thatis exposed at a railroad cut ·in U nrinoura, Tanoura-mura, Yatsush·iro-gun,
Kumamoto Prefecture.
The conglomeratic bed is a member ofthe middle part of the lower Middle
Permian Kozaki formation, the mainpart of wlrich is correlated with theffil!hl" Nn" zone-Cauccllina nippouica zoneof OzAWA in the Akasaka limestone ofcentral Japan. Excepting for the material from that pebble, I have not beenable to find the same species in any
other pebbles of limestone at that
locality or in any limestone beds andlenses of the Kozaki formation.
The specimens of Toriyamaia arescarce ·in an indurated white-grey limestone pebble, associated with 1\Iisellina
aff. J\1/. claudiac (DF.PRAT), Pscudojusuliua panemvolullt (DEPRAT), P. vulgaris(ScliEI.LWIE;o;), P. sp., Nagalvella aff. N.
kobayashii T HOMI'So~. Nmtllinella sp.,
Sclmbertella irumensis (HuziMoTo), andScluebertella. sp. nov. Algal remains
such as Gymnocodium sp., !vfizzia vclebitana ScHURERT, and Jlfizzia sp. are:\bundant in the same pebble. The faunal assemblage of fusulinids indicatesthat the new genus probably is of Lower
Permian age.
Description* Read at tht> 6ist meeting of the society at
Genus

Kyoto. june 18, 1955; received Dec. H. Hl55.
251

Tvriyamaia

KANMER.\,

nov.

252

Kametoslti KAKMER.-\

Type species: Toriyamaia laxiseptata
sp. nov.

KAKI\.fERA,

Diagnosis.- The shell is small andelongate fusiform to subcyl·indrical inshape, with bluntly to broadly roundedpolar ends. Mature specimens of five
volutions measure about 2.5 mm. long
and lmm. wide. The inner one to one
and a half yolutions are subdisco·idal inshape with blw1tly to broadly rounded
periphery, of which the first ·is slightly
to distinctly evolute, posses~ing a short
ax·is of coil·ing wlrich is sometimes coiled
askew at an angle of less than about 30
degrees to the axes of matw·e volutions.
The second volution is involute, having
a short axis of co1ling and a very broadly swelled periphery. Beyond thesecond volut-ion the axis of coiling ishighly elongate and the shell becomescylindrical ·in shape.
The proloculus is minute and sphericaL
The chambers rather rapidly increasein height, especially in outer volutions.
The spirotheca is thin, cons·isting ofa tectum. wh·ich is exceedingly thin, anda less dense structureless lower layer
which corresponds to diaphanotheca ofother fusulinids. The upper and lower
tectoria are not developed. The septa
are loosely spaced and are the same instructure as the sp·irotheca. They are
essentially unfluted throughout the shell.
The tunnel ·is singular and broad,reaching a height of about 1/3 to 1/4of that of the chambers ·in outer volutions. Chomata are almost absent
throughout the shelL
Discussion.-Only the type species isknown at present. It seems to be closely
related to the genotype species of Rauserella DuKnAR on one hand and to
Lei?lla Di.tNBAR & SI\IN!'Er< on theother. It ·is intermediate in shell structure between the two genera : It isprovided with inner volutions similar
to those of Leella and with outer
volutions resembling those of Rausere·lla. However, it is readily dist-inguished from Leella in possessing amarkedly elongated subcylindrical mature shell, more broadly swelled periphery in inner volutions, more loosely
spaced ctnd less numerous septa, and theabsence of chomata and tectoria ofspirotheca throughout the shelL It also
differs from Rauserella in that themature shape is un·iform, the axes ofcoiling of inner discoidal volutions are
inclined to those of outer volutions at
dist-inctly smaller angle than in Rauserc!la. the axis rapidly extends in an
earlier stage, the discoidal to subdiscoidal volutions are less numerous andtheir periphery is very broadly rounded,and the chomata are absent throughout
the shelL
This new genus Toriyamaia is named·in honor of Dr. Prof. ToRIY AMA \Vho had
been guiding me in studies of fusulinid
fossils.

Geologic age.- Probably the Lower
Permian: the associated fusulinids andcalcareous algae are mentioned 1n theforegoing chapter.

T<wiyamaia la:ciseptata, sp. nov.
Plate 35, figure:> 1-H

Description.- The shell is small,elongate fusiform to subcylindrical, withbluntly to broadly rounded polar ends.
Mature specimens consist of five volutions and attain a length of 2.0 to 2.6
mm. and a width of 08 to 1.1 mm,
giv1ng form ratios of 2.0 to 2.6. The
first volution is discoidal in shape withbroadly rounded periphery. It appears

Toriyamaia. A New P-ermian Fusulinid Genus from the Kuma Massif. Kyushu

to be slightly to distinctly evolute.
Although the second volutions also hasa short axis of coiling, it is perfectly
involute and has a more broadly swelled
periphery. About a half of the specimensat my disposal have a straight axis of
coil·ing throughout growth of shell.
However, in the rest of them the axesof coiling of inner one to one and ahalf volutions are inclined at angles
less than 30 degrees to those of outer
volutions. Beyond the second volut-ion
the axis becomes rapidly extended.
Average form ratios of the first to thefifth volutions of five specimens are
0.65, 0.88, 1.8, 2.2, and 2.3, respectively.
The proloculus is minute, and its
outside diameter ranges from 72 to
114 microns. averaging 86 microns forseven specimens. The shell rather rapidly expands, especially in the third andfourth volutions. Average heights ofvolutions of the ftrst to fifth volutions
in nine specimens are 42, 58, 95, 154,
and 165 microns, respectively. The
chambers are lowest in the center ofthe shell and are highest in the end
zones of the shell, especially in outer
volutions.
The spirotheca is thin and is composed of a very thin tectum and a lessdense, but not clear, structureless lower
layer which corresponds to the diaphanotheca of other fusulinids. The lower
and upper surfaces of the spirotheca
are not covered by a tectorium. The
thicknesses of the spirotheca of the firstto fifth volutions are 6-9, 9-14, H--18,
23--28. and 28-32 microns. respectively.
It is almost equal in thickness throughout the length of the shell.
The septa are the same in structure
as the spirotheca and the lower layer
extends down to the lower margins of
the septa. They are essentially unfluted
throughout the length of the shell.

253

However, they are not straight andplane but are gently curved or undulated,
especially in polar regions. They arevery loosely spaced and extend anteriorly at a rather large angle from normal
to spirotheca and number 6-7 in the first
volution, 6-8 in the second, 7-8 in thethird and fourth, and 8 in the fifth. Although the tunnel had been observed inonly two specimens (pl. 36, figs. 4 and 5),
it is broad and low, attaining about 1/3
to 1/4 the height of the chambers. In
those specimens the tunnel angle is 30-31
degrees in the third volution and 43--54
degrees in the fourth. Its path seems tobe slightly sinuous. The chomata arealmost absent throughout the shell, as
the accompanying illustr:1lions demonstrate. However, so far as seen in thesection cuWng along the septa, they
seem to be developed ·weakly at only
the edges of the tunnel.

Discussion. - Toriyamaia laxiscptata,sp. no\-., is the only representative of
this genus known at present. The otherdescribed forms which it resembles are
Led/a fragilis DuNBAR & SK!~!':ER. L.
bel/1tla DuNBAI{ & SKIN'\EI<. and Rouserella crratica Dii~BAR. However, it clearly
differs from the former two in having
more elongate cylindrical shell, more
broadly rounded periphery in inner volutions. more rapid extension of axis ofcoiling in earlier volution, less numerous
septa, and the abEen:.:e of chomata. It
also is readily distinguished fromR. erratica in some respects.
Its
inner volutions are of staffelloid form,
having very broadly swelled periphery.
while those of R. et-ratica are ozawainellid, having rather angular periphery.
Its shell attains greater length in earlier
volutions. The axes of inner volutions
are sometimes coiled at angles up toM~amr<!nnnt ofNum. of Le
w·dForm Diam.
Vol.
ngt 11 1 t 11 ratio Prol.

Specimen

1\:)

Toriyam.1ia la:~iseptata, !Pn. et sp. nor, i'l milli n :t~r3

1

Height of volutions
--

-·

1

~

Form ratio of volutions

----·

2

3

4

5
. 17•1·

1

2

3

4

5

2.3

1 (Kz . 209-38)

5

-

1.08

.043

. 061

. 107

.164

II

40, b)

4

.85

.075

.013

.057

.100

.150

3 (

",,

89)

-

-

.086

2(

.90

-

-

. O.J.3

.057

.100

.136

2.30

.92

2.5

. 072

.033*

.043*

.072"' .114*. 155*

. 70

.90

1.7

2.0

1. 54·

. 69

2.2

.086

.on*

.057*

. 079~

. 61

. 75

1.9

2.2

1. 31

.51

2.1

.072

. Ott*•055*.070* .116*

. 60

. 75

1.6

2.3

-

.7'J

-

.100

.043

.072

. 100

.172

-

.70

.90

-

1.38

65

2.1

.1H

.043* .050*

.093*

-

-

.66

1.1

2.0

-

4 (

88)

6(

,
,

7 (

II

90)

"

87)

5 (

8 (

1
4;r
5
4
3
3-·
1
4
3 _1_
4

81)

40,a)

. 143*-

I

SpecimenIof spirotheca
3

2

4

;,..

Septal count
5

- - -

2

1

3

z

4

1 (K?;. 209-38)

,

. 007

.009

.018

.025

.028

7

7

7

8

40,b)

.007

.009

.018

.028

-

6

6

7

'i"(?)

3 (

II

89)

-

. 011

.018

.023

.O<l2

6

8

8

8

II

88)

.007

.009

. 01•!

.028

.032

81)

.007

.009

.014

.025

40.a)

. 005

.011

.016

.028

90)

. 007

.014

. 018

.023

87)

.009

.014

. 018

-

-

-

5 (

6 (
7 (
8 (

,
,
,,
II

.

::::

5

I

----

2 (

It(

-

---~----·* Heights of volutions are measured at

-

-'{

(I>

;;::

----------

Thickne~s

;;::
:.>
3
0
"'2:

8

-

-

- - - ------- - - - - 3

3
3
3
•L
1;r_ 2T 3·:._ and ·14'·~______ j

volutions, respectively.

Specimens 1-6 and 8 are illustrated on Piate 36 as figure:;, 11. 12. 13. 2, 1, ·l. and 5, respectively.

t:l

:;e

>

To,-iyamaia, A New Permian Fusulinid G;mus from the Kuma Massif. Kyushu

about 30 degrees to tho~e of mature
volutions, but the change of axis ofcoiling is not so large as in Rauscrdla.
It retains regular and uniform shape inmature stage, but Rauserella has anaberrant nature of irregular coiling inmature shell.
Chomata are almost absent tbroughout
the shell in this species but are welldeveloped in inner discoidal volutious in
Rauscretla.
Paleontological Considerations

Among the genera which were referred to the subfamily Ozawaiuellinae
TIIOMPsor-: & Fos-rtm, Rauscrclla andLcdla. and Toriyamaia described above
constitute themselves one particulargroup having long axes of coiling andrather large and loosely coiled shell.
Species belonging to tllO!;e genera haveminute proloculi and discoidal to subdiscoidal juvenile shells with rounded
periphery. They seem to show little bylittle a \'ariation in the pattern ofcoiling within the group. Namely. inthe species of LcMla the axis of coilingis straight throughout the shell, although
it is the shortest diameter in inner two
to three volutions, and the change froma discoidal first volution to a fusiform
mature shape is uniform. Whereas in
Rauscrclla the inner three to four
discoidal volutions are coiled at a large
angle to the axis of coiling of the outer
volutions which form irregular fusiform
shape. HoweYer, an intermediate patternof coiling between the two genera justmentioned is observed in Toriyamaia.
Namely, in that genus the inner one to
one and a half discoidal volutions are
frequently coiled at angles up to about
30 degrees to the axes of mature volutions. which assume uniform shape.
Furthermore, the spirotheca of those

25S

genera seems to be principally identicalin structure. Namely. it is composed ofa tectum and a rather thick Jess dense
lower layer or a diaphanotheca. Seemingly tectoria only cover it upper andlower surfaces in chambers wherechomata are \vell developed. In Toriyamaia chomata me absent. and the
spirotheca is not covered by tectoria.
However, chornata are well developed in
inner volutions of Nauscrclla and in
Lee/hi, and the spirotheca of the latter
genus is compo::::ed of a tectum, diaphanotheca. and upper and lO\\·er tectoria,
and that of Rauscrclla is, according tothe original description by DUNB:,R,
compo::::ed of a tectum and a diaphanotheca in outer volutions, but of a thin
median layer and epitheca above andbelow in inner volutions. In short, it isobvious that the three genera are biologically closely related and should be
included in a group of the same phylogenetical stock. Therefore, it is considered that it had better to discriminate
the group having long axis of coilingfrom other genera of Ozawainellinae.
However. the species referred to thosegenera are lOCarce and their phylogenctical positions and their ancestoral form
are not yet certain. so it is not entirely
feasible at this time to establish a new
subfamily.
Whereas. as stated by Dt;NR!d~ andSK!NNEI<. the shell of Lcdla shows aclose parallel with SjJ/wcrulina in thepatlcrn of coiling, especially in inner\'Olutions. Howeyer, they probably differ
entirely from each other in the structureof their spirotheca. Namely, the spirotheca of SjJ/wcrulina is always replacedby secondary mineralizabon. so far as
has been known. The same replacementin spirotheca is seen in the genera of
Naukiuclla. Pisoliua, and Stajfclla, thespirotheca of which also resemble that

256

Kametoshi KANMERA

Explanation of Plate 36
FigureToriymnaia laxiseptata. gen. et sp. nov.
I, Axial section of the holotype (immature); 2, diagonal section of a paratype;a. tangential section of a paratype; 4, 5, axial sections of paratypes (immature);(i-9, tangential sections of paratypes (8. slightly oblique); 10, diagonal section ofparatype; 11-13, sagittal sections of paratypes (13. not well-centered); B. parallel section of a paratype; parachomata·like pattern in outer volution is formed bysecondary replacement of dolomite crystals. All figures x 25
All are from an isolated pebble in a conglomeratic sandy shale exposed at arailroad cut (Loc. Kz. 209) in Uminoura, Tanoura-mura, Yatsushiro-gun, Kumamoto Prefecture. Reg. no. GK-D 10201-10214.
15-17. Associated species with Toriyamaia laxiseptata.
15, .Misellina aff. M cumdiae (DEPRAT), axial section. x 10
16. Nagatoella aff. N. kobayashii THOMPSON, axial section. x 10
17. Pseudofusulina pammvoluta (DEPRAT). axial section. x 10
18. Enlarged part of sagittal section of a paratype illustrated as fig. 1·1 showing thestructure of spirotheca and septa, x 100
19. Enlarged part of a~"ial section of a paratype illustrated as fig. 10 showing thestructure of spirotheca, x lOU
1-11.

Photos by KANMERA
All specimens used in this study are kept in Department of Geology, Faculty of Science,
KyusllU University.

Toriyamaia, a New Permian Fusulinid Genus from Ute Kuma Massif. Kyushu

of Splzacrulina. These latter four genera
resemble one another in many otherrespects, and they should be included
in another group classified by Mna.UcHoMAKLAI (1949) as the Staffellininae.
Rauserella was first de.scribed fromrocks of upper Guadalupian age in northern J'vlexico and Texas. In Japan it
has been known in association withmoderately advanced species of Ncosclzwagerina and Verbcekitza, such as N.
craticulzfera (Scuw AGER). N. margaritae
DEPR.'<T and V. verbeel~i (GEINITZ), andwith highly advanced forms of Yabeina
and Lepidvlimt, such as Y. yasubat:nsis
ToRJYAMA and L. toriyamai KAKMERA.
Leiilla was originally described fromthe upper Guadalupian series of Texas
where it is associated with Cvdvnofusiella paradoxica DursnAR & SKJ:-;NER and
Polydicxodina s/zumardi DUNBAR & SI.;IKNER, but it has not yet been foundin Japan. Tvriyamaia, as describedin the foregoing chapter. occurs together\vith the most primitive verbcekinid,Jtl£sellitlll aff. 1\f. claudiac (DEPRAT) andwith more or less advanced forms ofschwagerinid, such as Nagatoella aff.
N. kobayashii TH<>MI'SON, Pseudojusuli11a
panmwoluta ( DErRAT), P. vulgm·is(ScHELt.WIEN), and P. cf. P. ambigua( DEPRAT ). Moreover, the limestone containing those species is a pebble of theconglomerate of the Kozaki formation
which is characterized by the faunacomprising the most primitive neoschwagerinid, N. simplex OzAWA, andMiselliuaclaudiae (DEPRAT), Ccmcdliua

257sp., •· Verbeeki11a spltaera OzAwA " ,Parajusuli11a lutugini (ScllELLWJEr-<).
Schwagcriua japonica (Gi';MIIEL), Ya11gchienia itziqua LEE. Splwerulina crassispira LEE and Sclmbertclla giraudi(DF.PRAT), etc., and, is compared withthe "Nn '' zone-Caucelliua uipponica
zone of OzAwA in the Akasal<a limestone
in central Japan and with Chihsia
limestone of China. From these facts,
Toriyamaia probably occurs earlier in
Permian time than the other two
genera in consideration.
Almowledgcmcnts
I wish to express my hearty thanks
to Dr. l\1. L. Tuol\u·soN of Kansas
University who has read through thetypescript and given me valuable criticisms. I acknowledge my sincere thanks
to Prof. R. ToRIYAMA of Kyushu University for his kindness in permitting freeuse of his library and in reading throughthe typescript and to Prof. T. MATSl>
1\It>To of the same university for his
continuous guidance and encouragement.

References
0. and Sl<IN!\ER, j. \V. (1937).
Permian Fusulinidae of Texas. Unh•.
Texas. IJu/1. 3701, The Geology of Texas.
THOMPSON, M. L. ( 1948), Studies of American
fusulinids. Univ. Kansas, Paleonl. con/r..
Protozoa Art. 1.
- - , (1954). American Wolfcampian fusuli·nids. Jbhl .. Art. 5.

DUNBAR. C.

K. K ANMERA:

Toriyamaia, a new fusulin id genus

Plate 36

~
. • .

5

•

15

258

PUBLICATIONS RECEIVED (16)1z6o. iR:fi:litlifrr:

il'ii?Jltl,l,.llrrt.J~!lJ!7)U.Jil!\f**~~;jfi.Jf1.:w-;t;·~·:i9Jl

ms ~ m1 -~}. 1956.

: il'li~HVl;ilJtiJI.:ft.f-?J~I~(1)=. 31.:1261.
--:>1. ,-cw; s Th mf.li?iii#J~~~IJ!ilf'J'E ~ i'i"

3 -ij, 1956.

desNaturhistoriscften

University. Ser. B. (Bioi.. Earth S;;.)

1268. Japan. Jour. Geol. Geogr. Vol. XXVII.

No. 1. 1956.
Bd. 37. Nr.

3/4. 1956.
1270. Acta Palaeontologica Polonica. Vol. l.

No. 1.

Vol. II. No. 2, 1956.
l'elecypoda

A. E.:

1\ht-

seums in Wien, 60 Band. 1954/55.

1269. Senckenbergiana Lethaea.

1262. The Science Reports of the Saitama

1263. WilSON,

1267. Annalen

of

lht~

Ottawa Formation of the Ottawa-St.
Lawrence Lowland. Geol. Surv. Canada.

1271. Acta Palacontologica Polonica, Vol. 1.

No.2.
1272. Roc;mik Polskiego

Towarzystwa Geo-

logicznego. Tom XXIV. Zeszyt 2-3, za

Bull. 28, 1956.

Rok 1954, 1956.
1264. ToZER, E. T.:

Uppermost Cretaceousand Paleocene Non-marine Molluscan
Faunas of Western Alberta. Geol. Surv.
Canada. Mcm. 280. 1956.
1265. STEARN.

C. W.:

127:-l. W.·.-rsoN.

D. M.S.:

Labyrinthodonts.

The Bmchyopid

Bull. Brit. Mus. (Nat.

Hist. ). Geol., Vol. 2. No. 8, 1956.
1274. SYLVESTE}{-I3RADI.EY, P.C.: The Struc-

Stratigraphy

andutrc, Evolution and Nomenclature of

Palaeontology of the Interlake Groupthe Ostracod Hinge.

and Stonewall For111ation of Southern(Nat. Hist.), Geol.. Vol. 3. No. 1, 1956.

Manitoba. Geo!. Surv. Canada. l\Icn1.

1275. Bull. Geo!. Surv. Great Britain, No. 11.

281, 1956.
1266. FI.A WN,

Texas

Bull. Brit. Mus.

1956.

P. T. :
andDasement

Southeast

Rocks ofNew

Mexico.

Univ. Texas. Pub!. No. 5605, 1956.

1276. Summary Progress of the Geol. Surv.

Gr. Britain and Mus. Pract. Geol. for
1955, 1956.

Trans. Proc. Palaeont. Soc. Japan. N. S.. No. 24. pp. 259-265. Pl. 37. Oct. 31, 1956

300. FUSULINIDS FROM THE LIMESTONE CONGLOMERATE IN
THE YAGOOKI VALLEY, TAMANOUCHI, HINODE-MURA,NISHITAMA-GUN, TOKYO-TO, JAPAN*
SUMIO SAKAGAMI
Departmen of Geology. Hokkaido Gakugei University. Hakodate:WJirt\11iJl.i~Jf/1M13 O)f:lH"l' (IEl;i;:~[!J'.f.J) xO)fkJ"' ,. ;;t '1-.ftl.::;t..; :t ~l:l.l)l(-!fl~zrlflO),fjjf!¥.£hf~:U : M:W~lli!·;,1'Jft.:l.:~J'\l, Lt.::Ufk-!fl~;f/-.:f-:0)1 1Hil~:;W!I~'fj;J,I;ci(l.r.~ H'J t.~::'13~~2: .f jLl.:~-~~vn ·;:, fG;r;lf~. i[Jj£1Jt~l!(~:00)~rfil! Pseudosta(fella? tammwuchiensis S;,KA<;;.l\11 ]k'{}i\'Ji~W Schwage1·ina

furoui var. tamanouchiensis SAKAC\1\11 ~~·~iJ]IiH.. t.:, 2:<l.:.Hijfj-i.:....-,1.. .-c !i~flt:il::!;,.;;,o:f}~Introduction and Acknowledgements.!:i(J. 1:·

merate.
I am greatly indebted to Prof. Haruyoshi f't;JJMOTu of Geological and Mineralogical Institute, Tokyo University of
Education for his valuable assistanceand kind guidance during the course of
my study. I also express my gratitude
to Dr. I\.yuzo ToRIY.\1\lA, Professor of
the Kyushu University for sending me
his papers on fusulinids from the Yasuba
type conglomerate. My thanks also due
to Mr. Yataro YAMADA, teacher of the
Sakari High School, Iwate prefecture
whose manuscript paper has stimulated
my study. I also wish to thank Prof.
Kotora H;,T,\I of the Department of
Geology, College of Educntion, Tohoku
University for his encouragement andreading of this manuscript. Acknowlegements are also due to Assistant Prof.
Kei OsniTR of our Institute and Mr.
Hisayoshi lc;o of the Tokyo U nivcrsityof Education for their kind advice andencouragement.

Since 1954, I have been engaged in a
stratigrapllical and paleontological studyof th~ Itsukaichi and Ome districts inthe southern part of the Kwanto-massif,
Japan. During my field survey in the
Yagooki Valley, Tamanouchi, Hinodemura, northeastern part of Itsukaichi
town, I have found interesting stratigraphical and paleontological data, of which
the latter is dealt with here. In thepresent paper is described some fusulinids which were found in a limestone
conglomerate, for which I propose thename of Tamanouchi limestone conglomerate. This facies may be correlated
to the upper type of the Yasuba conglomerate. The fusulinids from the Yasuba
type conglomerate were studied by R.
ToRJYAMA in 1942 to 1947. In his paper
he has pointed out that there are atleast two kinds of fauna in the Yasuba
type of limestone conglomerate. The
nresent fusulinid fauna is intimately~elated with the one described by R.
ToRJYAMA from his Yasuba type conglo-

Stratigraphical consideration

The Yagooki Valley consists of rocks
which have been included into the* Read jan. 21, 1956; received Feb. 8, 1956.
259

260

Sumio SAKACAMI

formations referred to the Tamanouchi
Paleozoic Zone by H. Fl;JIMoTo. This
zone consists of sandstone, shale. schalstein, chert and conglomerate. The
different rocks have a general strikeof N 30°-60° W and with varied dips.
According to Y. Y AT\tADA's investigation, the following species arc discriminated from two limestone lenses in the
Tamanouchi conglomerate in the Yagool<i Valley (his "Tamanouchi Valley").

The succession of the rocks in the
Yagooki Valley refer to route map oftext figure. It consists of sandstone,
shale, limestone and conglomerate whichintercalates schalstein and small limestone lenses. The Tamanouchi limestone
and other small limestone lenses are
generally non-fossiliferous, but a small
I i mestone block n'teasuri ng about 2.5 rn
thick and about 3m long, and intercalated in limestone conglomerate shown in
the route map yielded the following
fusulinid species.
rG/omospira cfr. pussilla GEINITZ
Endotlzyra sp.
Tetra/axis cfr. conica EIIRENII.
Tctmlaxis p/atyccplza/a Y AMAnA. MS.
Tctrataxis tria11gulata Y A:'I.IADA. MS.
Ozawaine/la waageni ScHW AGFRStaj]ella yobarensis OzAWA
Staffe/la minima YAJ\!t\DA. MS.
Scllllbertella melonica UUNUAR and
SKINKF.R

Fujimotoi11ella tama1rouclziensis YA'.IADA,
l\15.

Triticites mi11imus Sci!F.LT.WIEN
Schwagerina krotowi (ScHE!.LWIEN)
Sclzwagerina japo11ica (Gul\mEL)
Scluvagcrina cfr. japonica var. hayasalmi(LEE)
Misellina claudiae (DEPRAT)!11isellina c/audiae var. ogrmoi Yamacla.
MS.
Pscudodoliolina ozawai YARE and
HANZ.-\WA./lleoschwagerina margarilae DEPRAT
1\fizzia verebitana SciiUUERT
Tetracoral gen. and sp. indet.

He had pointed out that the faunalassemblage constitutes a unique andinteresting one.
The Tamanouchi conglomerate which
is best distributed in the Yagooki Valley
can be observed at only one exposure in
the Minokuchi Valley situated to thewest, aml it seems to be missing inother nearby valleys. From such facts,
it is considered that the structure iscomplicated.

Scluvagcrina furoni var. tamammchiensis

SAKAGAMI. n. var.
E:clumgerina cfr. japonica (GUJI.IIIEI.).<::chwagcrina sp. A
Neoschwageri1ta margmitae DEPRAT

There· arc at least four horizons of theTamanouchi limestone conglomerate in
the Yagooki Valley. Its true thickness
is unlmown due to the complicate geologic structure already mentioned. The
conglomerate is composed of pebbles ofsandstone, schalstein, limestone andrarely chert cemented by limy sandstone.
The pebbles vary in size, but are mostly
1 to 2cms in di<tmeter. and subangularor round·. in shape. The limestone pebbles comprise two kinds in color, namely
one kind are brownish grey and theother whitish colored. The limestone
pebbles and the matrix contain different
species of fusulinids and some corals.
The pebbles yielded the following
species.
Ozawaittella sp.
Staffella moellcri Oz,\ w A
Nankinella sp.
Schubertella? thompsoni SAKAC AMI l\IS.
Pseudostaffe/la? tamanouchiensis
SAKAGAJ\11, n. sp.

Triticiles kawanoboriensis FUJIMOTO
Triticiles sp.
P seudoschwagerina sp.

Fusulinids from the Limestone Conglomerate in the Y:~gooki Va\leyPseudojusulina vulgaris (Sc:JJEJ.I. WIEN)
Pseudojusuli1w vulgaris var. globosa(SCHELLWIEN)

Pseudo{usulina sp.

The faunal assemblage of the limestone
pebbles abridged above indicates theWolfcampian in age.
The matrix of the pebbles yields thefollowing fossils.
Pseudojtlstllilla spp.
Verbeekina sp.
JIIiselli11a cfrmdiae (DEPR AT)
Pseudodolioli11a ozawai YAUE andHANZAWA

1\'eoschwagerina craticulifera (Scuw ACEH)
Neoschwageri110 douui/lei OzAwA
Yabeina cascadensis (ANDERSON)
Chaetetes sp. indet.
1Vaagenophyllum sp. indet.

fl

From this fauna, it is inferred thatthe assemblage corresponds to the Guadalupian in age. Most of the fusulinids
that occur in the matrix may lmve been,in part, derived from their heiillatland.
Pseudostaffella has been known torange from the Profusulinella zone to
the Fusulina zone in the middle Pennsylvanian, thus it is older than theV/olfcampian that yields Pseudnfusulina
vulgan·s. However, at the present
locality, Pseudostajfel/a ? tammtouclu'ensis n. sp. was found in a limestone pebble
containing Pseudofusulina vulgaris.
From the lithologic character and themode of occurrence of Pseudostoffel/a?
tammwucltiensis n. sp. and Pscudofusuliua tmlgaris (Plate 37, figure 3), it isdifficult to consider that the shell of theformer was embedded in the limestone--.-_,.N
to ITSUKAICHIJL----.
toME

SV.AU.

LIMESTONE llLOCK

iEiE ~ rniillill

SANDSTONESHAJJ:;

SC~~IN

Text figure; Route map of the Yagooki Valley.

that contains the latter species, before
the limestone was sedimented as a pebbles. Pseudnstaffella ? tamatwuchiensis
n. sp. is questionably referred to thenamed genus.
The geological age of the Tamanouchi
limestone conglomerate from its fauna
may be referred to the late Guadalupian
if not later, and it is regarded that thisconglomerate can be correlated with theupper type of the Yasuba conglomerate,even though the lithologic character ofthe former may be slightly different

from that of the latter. Unfortunately,
I haYe had no opportunity to visit thetype locality of the Yasuba conglomeratein Shikoku.
In the Kwanto-massif, the Yasuba
type conglomerate had been knO\m fromonly one locality in the northwesternpart of Ome. :tnd it is to be stated that
it is of the lower type. Hence the present
paper is the first description of a conglomerate facies that should be correlated with the upper type of Yasuba
conglomerate in the Kwanto-massif.

262

Sumio SAKAGAMI

am of the opinion that the conglomerate in question may prove to be a
key important for solving many problems with regard to the geology andpaleontology of the upper Permian in
the Japanese Islands.
Description of new species andnew variety

Pscudostaffclla ? tama11oucllic11sis
S~\KACAMI. n. sp.
Pl. 37. Fig:;. 1-3

fl. single but typical axial section and
one tangential section. Shell minuteand spherical. The periphen· of all
volutions are rounded and the axial
regions are sliglltly depressed in outer
volutions. The first two to three Yolutions are coiled at a large angle to theaxis of the outer \'Oiutions. Axial lengtl1
and width are 0.6'1 mm and 1.11 mm
respectively in the sixth volution.
Form ratio of the first to the sixth
Yolutions of axial section is 0.80. 1.0, 1.0,
1.11, 0.94, 0.77 and 0.60, respectively.
The proloculus is minute. Its outer
diameter is 0.03 mm. The rate of growthof the first to the sixth volutions of t 1w
axial section is 0.10. 0.18. 0.27, 0.31, 0.57
~mel 0.8G mm. respectively.
Spiro theca thin. Its thickness of thefirst to the sixth volutions of the axial
section is 0.013, 0.017. 0.016, 0.017. 0.021
and 0.021rnm. respective!;-. The spirothe;::a seems to be composed of a tectum.
a diaphanotheca and a thin lower
tectorium.
Septa are unfiuted. however, they areslightly fluted in the extreme axial
regions. The chomata are developed.
The tunnel angle measures 19° and 21 oin the fourth and the fifth volutions,
respectively.
Remarks:- The genus Pseudosta.ffella

has been known only from the middle
Pennsylvanian age throughout the world.
The present specimen from the following points is considered to be within
the limits of the genus Pseudostaffcl/a.
The shell is minute and spherical, andthe axial regions are slightly depressed.
The inner volutions are coiled in a large
angle to the axis of the outer ones.
However. in the spirothccal structure,
the present specimen seems to diverge
from the true characters of Pseudostaffdla. The spirotheca of the previously
recorded species of the genus Pscudostaffella is composed of a tectum and lower
and upper tectoria. while that of thepresent one consists of a tectum, adiaphanotheca and a lower tectorium,and furthermore. the chomata are lessdeveloped.
From the above mentioned criteria. it
may be necessary to establish a new
genus or a new subgenus for the present
species. However. until a larger numberof specimens accumulate. the present
species is referred to the genus Pscudostaffclla with question.
Geological age and Occm-rc1tcc :- Tllis
species occurs in association with Naukinclla sp.. Staffella moellrci Oz,\W A,
Sclzub<!1'/clla ? thompsrmi s,\KAGAMI,
MS., Pscudofusulina vulgaris (ScHEI.J.WJT·:C'ol). Pseudofusuliua vulgaris var.
globosa (ScHF.LI.WIP.N) and Pseudofusulina sp. in a limestone pebble of theTamanouchi limestone conglomerate in
the Yagooki Valley, Tamanouchi, Hinodemura, Nishitama-gun, Tokyo-to. Japan.
Its geological age may correspond to
the upper \V olfcampian age of North
America.
Schwagcri11a furom var. tammzouc!Jicusis
SAKAGAMI n. var.
Pl. 37. Figs. 4-12

Shell moderate to large in size andMeasurement5 of Schwagerina juroni var. tama11ouchiensis
SAKAGAl\11.

"

.I
6.66

1. 2544-A 1j
2. 2544-B ' 4.48
3. 25·t5-A II 6.59

4. 2543-A
5. 2546-B II 5.92
6. 2547-A
6.22

I

7. 25-18-A
8. 25-18-B I

I

9. 2~19-A
10. 2551-A I.

ISpecimen

I

I

w.

L.

Specimen

3.66
2. 78
4 07
3.66
3.44
3. 59
4.18
4.26
3.25
3.78

I

R.
I

1.8

I

1. s

P.

i'l

1.7
1. 7

I

I

1

I

r3

2

1

4

5
3. OS
2.78
2A8
2.26

n

1. 78

2. 37

1. 67

1. 26

1. 48

2.18
2. 00

o. 78
1. oo
o. 10 1 1. 18
il 0.85
1.26

1.4-1

1. 78

1. 63
1.74

2. 26
2.29

11

1

o. s9
0. 56

, o. 81
0. 81

o. 56
o. 44

, o. 73
I
o. 85
1

I

I

1. 18
' 1. 18

1. 10
1. 70

2. 22
2. 26

I 1. 10

1. 46

1. 2s

1. 7!S

2. 02
z. 48

I

1

I 2 I 3

1. 2544-A I .042

.0791.087.103.1261.1421-1-

1. 2544-B
3. 2545-A.048
I .040.048 .095.048 I .064

.126
.087

.111
.087

.126

4. 2543 -A I . 032
5. 2546-B.04g. 0481 . 032.064 .064

. 048
.087

. 079
.079

. ll1
.095

. 1261- I-

6. 2547-A .048 .056 .079
7. 2548-A I .048 .064 .079
8. 2548-B I .056 .079 .071
. 9. 2549-A.035 .052 .052
110. 2551-A.064 _._o79_.o79

.Oi9
.095
.111
.069
.o79

.111
.095
.079
.087
.1n

.142
.142
.111
.087

-~-~~-~.142 .1111-?

1-J-11

1

4

j

5

j

6

I

1

..,.,

l

6

7

3.66
13.11
3. 7't
2.78
3.11

"'E.

1 112

10

I -

;:l

-

I :J.• o7
3.66

I

j

7

I 8

-1
.134

1

i

2

:::

=l=tI

3.59
3.55
3.55
3.25
3.78

I 3I 4/

-t.l8
4.26

-

_,_,
1

-

-,-1

5 j

'1-l-1-l- I ·~~-~-! -~- -

.111

-

11 I

-11- -

-'-II

51
6
9
7

221

-

28

1

25
26
19
26

-

-

- -

31

31 I
261
22
28

35
37
27
32

-~--

-

19!
201
18 I
23

6 :

7/

8

I

-:-I
-

I- -

30 I

~

......

as
;;;

3.+1-

2.85
2.92
2.85
2.85
2.57
3.15

1

_ _ _ _ _ _ _ Septal count ________ !

Thickness of SpirothecaI'------

Rate of Growth

1. 18

1.

0.81
11 0. 78
0.74

o.48
o. so
o.41
0.48

I
I

IJ

0.56
0.56

! 1. 6n. var. (in millimeters).

-

-I

-

-

31

-

36 3830 38 -

-

29

-

I

-1
-~

-I

~

El
r.

"'0
g

b:::1

lr.:

0

~
~

"'

...

;:l

iS
..-:
!>l

:a
0

:r.-

<

!>l

~

'<

-i

-j
-

ffi

264

Sumio SAI\AGAMI

Explanation of Plate 37
Pseudostaffella? tama11ouchiensis SAKAGAMI. n. sp.
1. Axial section, holotype; 2. Tangential section, para type; Reg. Nos. 2526- E and2525-F, respectively. x 30; 3. Showing the mode of occurrence of Pseudostaj)ella?
tamm1ouchie11sis; 3a, Pscudostaffella? tammzouchiensis; 3b, NatJkinclla sp.; 3c, Pseudo·fusu/ina vulgaris. x 10.
Figs. 4-12. Schwageri11a furoni var. tamallouchiwsis SAKAGAMI n. var.
4. Holotype; 5-12. Paratypes; x 10. Reg. Nos. 2544-A. 2544-B, 2543-A, 2548-A, 2548-B,
2546-A 2547-A. 2549-A and 2545-A, respectively.

Figs. 1-3.

All are presen•ed in the collection of the Department of Geology, Hakodate Branch, Hokkaido
Gakugei University.

S. SAI<AGAMI:

Fusulinids from Tamanouchi conglomerate

3Plate 37

Fusulinids from the Limestone Conglomerate in the Yagooki Valley

fusiform with straight axis of coiling.
The lateral slopes arc convex.
The length and width in the sixth
volution measure 5.9 to 6.7 rnm and 2.R
to 3.7 mm respectively, with a form
ratio of 1 : l.G to 1 : 1.8.
Proloculus spherical and large. Its
average outer diameter is about 0.51 mm
for ten specimens.
Septa are rather thick and regularly
fluted throughout the length of the shell.
Spirotheca is composed of a tectum
and a keriothcca. The average thicknessof spirotheca in the first to the sixth
volutions of ten specimens measure 0.047,
0.062, 0.072, 0.090, 0.098 and 0.109 rnm.
respectively.
Axial filling is poorly developed in
the axial regions. Chomata indistinct.
Remarks : - The present form resembles Scluvagcrina furoni TlloJ\n•so~.
which l'vl. L. THOl\tPsoN reported fromthe Bamian limestone of Afghanistan,in its shape. large pro:oculus and themode of axial filling. However, thepresent form differs from TuoMrso::-;'sspecies by the thinner wall. more regularseptal fluting and finer alveolar structure of the kcriotheca.
Geological age and Occurrence:- The
present form occurs in association with
Schwagerina cfr. japonica (GiiT\mEL),
Scltwagerina sp. and Neoscluvagcriua
margm·itae DEPRAT. Its geological age
may correspond to the upper Guadalupianof North America. This new variety
was collected from a small limestone
block in the Yagooki Valley, Tamanouchi,
Hinodc-mura,Nishitarna-gun.

265

Tokyo-to, Japan.
Referem·es
HuzntoTo. H. (1936). Stratigraphical and
Palaeontological Studies of the Kwanto:tvlountainland. Part 1, Stratigraphy; Sci.
RefJ. Tol1yo Bu11ril1a Daigaku. Sec. C. no. 4,
pp. 157-188. pis. 27-29.
- - (1936), Stratigraphical and l'alaeontologi·
cal Studies of the Kwanto Mountainlancl.
Part 2. Palaeontology ; Sci. Rep. Tokyo
Brmrika Daigalm. Sec. C. 110. 2. pp. 29-125.
pis. 1-26.
TIIOPSDN. M. L. (1947). Permian Fusulinids
from Afghanistan. ]oum. Pa/eont. vol. 20.
pp. 140-157. pis. 23-26.
- - (1948). Studies of American Fusulinids.
Univ. Kansas Paleont. Conlr. Protozoa.
art. 1. pp. 1-184, pis. 1-38, text·figs. 1-7.
ToRIYA!\IA. R. (1942). The Fusulinids of
the Yasuba Conglomerate in the Provinceof Tosa. ]apatz. ]ounz. Geol. Geogr.. val.
XVIII. 110. 4. 11 pp .. 2 pis.
- - (1944). The Fu;;ulinids in the Limestone
Conglomerate of the Sakuradani Area in
the Province of Awa, japan. ]oum. Geol.
Geogr.. Vol. XIX. 1105. 1-4. 16 pp. 1 pl.
(1945). The Fusulinids in the Limestone
Conglomerate of !nomine in the Provinceof Tos:-t. japan. ]oum. Geol. Geogr., Vol.
XX. no. 1, 12 pp .. 1 pl.
- - (1947), The Fusulinids in the Yast1ba
type of Lime:;tone Conglomerate in the
Kwanto Mountainland. ]apa11. ]oum. Gcol.
Geogr., Vol. XX. 1105. 52-.J, 7 pp .. 1 pl.
YAMADA, Y. (19-16). Geology of the lt:>ukaichi
District, Nishitama·gun, Tokyo-to. (injapanese with English description of somefusulinids). Graduation thesis of Tokyo
Bunrilw lhtil!ersity.

266

PROCEEDINGS OF THE PALAEONTOLOGICAL SOCIETY
OF JAPANr B *ii~!f?JJ~~m 64 ~{§IJ~J 1956 ~ 10 J:l

On the Occurrence of Liassic Cardi11ioides

fi B Jl( W*~111!~$:tll!:'lt~~fm~~~ fr: 1/:: 1r>from the Kuruma Group in Nagano and-c M illiL.tc (~~1t 15 .ti)o ftlfitii"*Mw:tr:

Niigata Prefectures, Japan ( ft!'2) .......... ..
.......................................... Itaru H.Y\' /\1'.11

f;!l~lii\fHl 1'1 f'i tJ\Q);iili lJ -c- a;~ o

On Some Lower Triassic Pelecypod-Fossils
f.{lll*ffiffiio:>:f.~lf'ilfo:>lili~fl::.:ri ( {t~) ... ""'.

...................... -- ........... TliJilll!!lf.!B • Jf:tj'ij~~-e~t:J.:. ;6 ~ \.... t.;~", -cfrom Maizuru Zone ......... Keiji NAKAZAWA~~

Neoschwagerininae 1.:......................................... -!ll~~H~7c

Ji('l:l\[!i!llilfi*':i~!Ro:> 1 ~{Ill.!: .:t-0)

microspheric

form? 1.:~1.'-c ............................. ~ll:rfi!fE
On the Septal Projection of the Halysitidae........... Takas hi HAMADAOn Some Fossil Echinoids from Kyushu,
Japan ......................... :...................... ···... Akira MoRISHITA & Kiyoshi TAKAHASIII~I: 7 11- 7" 7. imhtO)~fljj(~''}lfl.:

Trigonia 0) ;£ R.

(ftll\!) ......................... fliJEEI!!!O~ ·lit:!¥! §An Aluria from the Poronai Shale in Hokkaido ........................ Teiichi KoBAYASHIAn Aturia from (?) Kusu County, Oita Prefec-

ture. Kyushu .............. Teiichi KOBAYASHISupplementary Notes on the Cambt·ian fromSoutheastern Asia ......... Teiichi KOBAYASHI
On the Occurrence of Crotalocephalus, De·vonian Trilobites, in Hida, West Japan ...
...... Teiichi KonA YAS HI and Hisayoshi I Go
On the top-horizon of Desmostylus in Japan........................................... Nobuo lKEBE

Trans. Proc. Palaeont. Soc. japan. N. S.. No. 24, pp. 267-272. Pl. 38. Oct. 31. 1956

301. ON SOME NEW GLYCYMERID MOLLUSCS FROM JAPAN*
SABURO KANNOTokyo University of Education

Fl :;t>:~ Glycymcris }ij,.?:>i1ffjfi:.: -=>I. ·-c :L~.?:>~~~~~-L~ofr.:n Glycymeris ~ 'k~iMtp t.: '! t.: H!Jf!il.?:>~ro! a-;GJi!.
~ & ~ ~--------

The writer whishes to express his
gratitude to Profs. Haruyoshi FVJIMoToand Kotora H;. TAI of the Geological andMineralogical Institute, Tokyo University of Education for their advice andencouragement. Thank~ are also due to
Mr. Tsuyoshi Kol\n;RA for kindly offering
his collection to the writer for study.

Introduction

From the stratigraphical and ecological point of view, the genus Glycynu.:risis considered to be an important memberin the rich Tertiary pelecypod fauna ofJapan, especially, in the Neogene from
where about 20 species have been reported. The Glycymeridae, according to D.
N1cor. (1950) seems to have been derived
from the cuculleid stock probably during
the late Jurassic. However, in Japan,
Glycymcris densiliueata NA<;Ao (NAGAo,1934), the oldest known species, G. lzokkaidoensis YABE and NA<;Ao, and G.
amalmsaensis NAGAo appeared during
the Cretaceous age. With the openingof the Neogene there was a remarkableincrease both in species and individuals.
The relationship among these numerous
species of Neogene Glycymeris is an
important and interesting problem, but
at this place further remarks are reserved.
The purpose of this paper is to describe four new forms of Glycymeris fromthe Tertiary deposits of Miyagi, Fukushima, Saitama and Yamanashi Prefectures.

System a tic Description

Family Glycymeridae
Genus Glycymcris DACOSTA, 1778

Glycymcris idensis KA!'Il\O, n. sp.
Pl. 38, figs. l-5

Shell small in size, moderately thickand convex, subcircular in outline,
slightly longer than high; equivalve,equilater8.1. Beak central in position,
pointed, rather prominent, opisthogyrate.
Surface with more than 27 rather
obscure radiating striae, obsolete atends, crossed by wrinkled and fine concentric growth lines. Interior smooth,
ventral margin crenulated; adductor
scars distinct, isomyarian. Area broad,vertically incised with about 5 inverted
broad V-shaped lines. Teeth 7-11 onanterior and posterior sides, radially* Read at Sendai Jan. 21. 1956; received Jan.
27. 1956.
267

Saburo KANNo

268

arranged, strong, becoming smaller
towards middle: about 10 small verticallyarranged teeth in middle.
Dimensions (in mm.) :-

----

r

Specimens

HeightLengthThickness

x 100

I 100
X

Valve

Type

----

1.
2.

3~.8

34.2

35..13\..1

21. 1
18. 't

98.3
100.0

29.8
27.0

Intact
II

Right
valve

---

Holotype
Para typeII ratherdeformed

3.

30.3

28.8

10.0

100.5

J.l. 8

-1-.
5.
6.

28.0

29.9
35.1
35.0

10.3
9.8

9~.0

J.l. 5

II

92.5
96.0

27.9
:ll.4

II

II

"

II

7.

32.5
33. (j

31.3

10.5

11.0

9.3

Remarks :-About one hundred intact
and isolated valves were examined.
This new species resembles Glycymeris
yessocnsis (SowEIWY), a fossil and l~ecent
species from Japan, but the former canbe distinguished from the latter byhaving a less number of radial striae.
heavier test. and the more inftated shell.
Glycymeris matsumoricnsis Nol\<JrRA andHATAI (1937. p. 123, pl. 17, figs. 1-6)
from the lVIiocene of Nanakita, Miyagi
Prefecture is another related species.
but the heavy and large shell. the great
convexity, and large number of radialstriae serve to distinguish it therefrom.
Tyj1c specimells :-Holotype f<eg. No.
5536, and paratype Reg. No. 5537. Geological and Mineralogical Institute,Tokyo University of Education.
Locality and geological horizon: -Avalley cliff about 150 meters in the upper stream of the Tamagawa reservior,
Minami- ide. 6uchi-mura, Igu-gun, Miyagi
Prefecture. l'vliddle fossil zone of the
Yoshigasawa formation of the 1\~ne­yama group, Miocene.
Associated famta:-LaetJicm·dium slliobarcnse (YoKoYAMA), Cltione y-iizukai(KANETL\RA), C. osyuensis Noi\n:R,\, Dositzia (I(atzelwraia) kaucharai ouclzicmis
KANKO.

100.6

30.5

Left
valve

II

II

II

-----

Glycymcris jlabellata KANI'o, n. sp.
Pl. 38. figs. 9-13

Shell small in size, ~trongly convex,
transversely elongated, inverted fanshaped. subequilateral; anterior andposterior ends both narrowly rounded,
ventral margin regularly arcuate. dorsal
margin sloping, posteriorly and anteriorly straight. Beak central in position,
not prominent, but slightly pointed.
Surf[l,ce provided with more than 20
narrow and shallow impressed radial
grooves marked on central part andobsolete on either side of disc: growthlines rather indistinct. Teeth about six
on the posterior side, radially <o1rranged.
j\:Juscle scars inaccessible in all specimens at hand, inner margin crenulated.
Remarks :-This new species show somevariations in shell outline, however, theinverted fan-shaped form is its charac.
teristic feature. Glyr.ymeris ll·Sttzukii
OJNoi\UKADo (1938. pl. 20, figs. 1-3) fromthe Itahana formation (Miocene) is themost related species, but it can be
distinguished from the present one byhaving a large shell, heavier test, andhigher shell. Glvcymcris sp. (l\1. YoKoY ,\1\L\, 1926, p. 123, pl. 16, fig. 5) from
the Miocene of Shiobara, Tochigi Pre-

269

On Some New Glycymerid r.,Iolluscs from Japan

Dimensions (in mm.) :Sped mens

HeightLengthThickness

H xiOO

Angle between posterior
and anterior margin

Type

1.
2.
3.
4.
5.
6.
7.
8.

25.0
24.0
23.0
17.5
12.4
14.2
14.0
11.9

ca.35.0
ca.32.0
ca. 31. 0
2·l. 3
17.8
18. 7
22.0
16.7

ca.7.!lca.7.2ca.8.5ca. 71.5
ca. 75.0
ca.74.3
72.0
70.0
76.0
63.6
71.2

113'

Syntype

ll9°
121°
129°
123°
123°
126°
121°

,

Collected from lhe
Chichibu Basinca. •t. 5
ca..l. 0

L

9.

25.0

35.2

71.0

112°

10.

H.O

20.0

70.0

114°

11.

15.5

21.0

73.6

125°

fecture is the another allied species, but
its poor preservation makes precise
comparison with the present difficult.
Type specimens :-Syntype Reg. No. 5538,
Geological and Mineralogical Institute,Tokyo University of Education.
Locality and geological heriz01t : - Avalley cliff about 200 meters upstreamof the Tamagawa reservior, Minami· ide,
Ouchi-mura, Jgu-gun, Miyagi Prefecture.
Middle fossil zone of the Yoshigasawa
formation of Kaneyama group, Miocene.
About 300 meters on the western roadside of the Chigaya mineral spring,
Chigaya, Kamiyoshida-mura, Chichibugun, Saitama Prefecture. UpJ:er fossil
zone of the Akahira formation, upper
Oligocene.
Type specimens :-Syntype Reg. No.
5540, Tokyo University of Education.
Associated famza at tlze type locality :Lacvicardittm slziobarense (YoKoYAMA).
Lima yage11ensis Ona<A, Pmzope japouica (A. AlHMS), l'cronidia lldes vcnulosa ScHRENci<. P. j;rotovenulosa Nol\HJRA,
Nassarius iwakianus YoKoYAMA.
Gl:ycymcris comprcssa KASM>, n. sp.
Pl. 38, figs. 6-8

II

,
II

,
,
II

"

Collected from
Osozawa

Shell small in size, subcircular in outline, nearly equilateral, strongly compressed; test thin; anterior and posterior
extremities almost equally rounded; baseregularly semi-circular, dorsal marginsubequal, straight or a trifle convex,
forming at the beak an angle of about
115°-120°. Beak almost central in position, pointed, small but prominent,
orthogyrate. Surface provided withmore than 25 narrow and shallow
impressed radial grooves which aremarked at central part, becoming obsolete towards either sides of disc:interspaces between grooves flattened,much wider than groove, probably not
ornamented by fine radial striae on
their disc; growth lines rather indistinct. Area rather low and narrow,vertically incised with inverted broad
V-shaped lines. Teeth 12 on either side,
radially arranged, not strong, becoming
smaller towards middle; more than eightsmall, vertically arranged teeth in middle; inner margin crenulated.
Remarl<s :-The equilateral, compressedand subcircular shell of the present new
species resembles Gl:ycymcris ycssoensis(SowmmY), but the more pointed beak,

270

Saburo KA!\No

Dimensio11s (in mm.) :---

Specimens

HeightLengthThickness

a
L

X 100

T

I

X

100

----- ---ValveType

Intact v.
Left v.
Intact. v.
Right v.

Holotype
Paratype

----

1.
2.
3.

4.

:i2.8

31.8

14.2

100.3

27.3

28.7

7.0

32.2
25.5

33.0
ca.26.5

15.1

95.0
97.5

more distinct radial grooves and thinner
test serve to distinguish it therefrom.
G. yamasakii (YoKoYAMA) (1925, p. 20,
pl. 5, fig. 6) from the Pliocene of Shigarami formation in Shinano province isanother related species, but it can be
distinguished from the present one byhaving a lower shell and more finerradial grooves. G. 1lozokicnsis l-L\TAI andNISIY AMA (1951, p. 1. text-figs. 1-2) from
the Miocene of Nozoki mura, in Yarna·gata Prefecture has more predominate
radial ribs and a more circular shellthan the present new species.
Type specimens:- Holotype I{eg. No.
5541, and paratype Reg. No. 5542. Geo·
logical and 1\Iineralogical Institute.
Tokyo University of Education.
Locality ami horizon :-A road side cliff,
about 600 meters west of Akashiba,
Shinchi-mura, Fulmshima Prefecture.
Upper part of the Akashiba formation.
Associated [au11a :-Acila sp., JV/acoma
incongrua ( v. MARTENS), Dentalium sp.

Glycymeris osozawensis KA!'\!'\O, n. sp.
Pl. 38. figs. 14 a -c

Shell medium in size, subovate inoutline, nearly equilateral, moderately
convex; test thick; anterior and post·
erior extremities widely rounded likeventral margin, which forms with thema subquadrate angle. Beak central in
position, small, not so prominent. ortho·
gyrate. Surface provided w·ith morethan 25 narrow, shallow and obscure

4L7
48.8
45.6

,
II

radial striae, crossed by obscure incremental concentric lines. Inner ventral
margin crenulated. Area rather highand wide, vertically incised with 5-6
chevrons. Teeth 7-8 on either side,
radially arranged, rather strong, becoming smaller towv.rds middle ; more than
8 small, vertically arranged teeth inmiddle.
Dimensiom (in nun.) :-39.0 in length,42.3 in height and 13.7 in thickness of
the right valve (holotype), 41.3 in lengthand 43.6 in height of the another rightvalve (paratype).
Remad~s :-Th·is new species more orless resembles Glycymeris cmssitesta
OzAJ{J (1954, p. 15, pl. 8, figs. 1-2) fromthe Pliocene of Chushi, Chiba Prefecture,but it can be distinguished therefrom byhaving a higher form, narrow cardinal
area and less number of chevrons. The
present specimens were collected by
T. Koli!URA.
Type specimcus :-Holotype Reg. No.
5543, and paratype Reg. No. 5544, Geological and Mineralogical Institute, Tokyo
University of Education.
Locality and geological horizon :-Osozawa, Akebono mura, Minami-korna gun,
Yamanashi Prefecture. Shizukawa sandstone, upper part of the Shizukawa
group, Pliocene.
References
IIATAI. K. and NISIIIYAMA. S. (1951),

A New
G/ycymeris from Japan: Saito /lo-on Kai !lfus.
Ncs. Bull., 110. 21. pp. 1-2.

On Some New Glycymerid !vlolluscs from JapanKANNO. S. (1955), Geology of the Environs
of Kaneyama·machi. Igu-gun, l\li yagi Prefecture (in Japanese): Bull. Tokyo Uuiversity oj Education. no. 4. pp. 11-23.
KURODA. T. (1931), Geology of the Central
Shinano.
NAGAO. T. (l93t ), Cretaceous Moliusca from
the Miyako District. Honshu, Japan: jour.
Fac. Sci .. !Jokkaido Imp. Unit• .. ser. 4, vol.
2, 110. 3, pp. 177-277.
Nol\IURA. S. ::mel llATAI. K. (1937). A Listof the Miucene Mollusca and Brachiopoda
collected from the Region lying North of
the Nanakita River in the Vicinity of
Sendai, Rikuzen Provence, Japan: Saito
Ilo·on 1\ai. Mus. Res. Bull .. 110. 13, pp. 121U6.
NicoL D. ( 1945). Genera and Subgenera of
the Pelecypoda Family Glycymeridae:
joum. Paleo11t. t•o/. 19. 110. 6. pp. 616-621.
- - (19EO), Origin of the Pdecypoda Family

271

Glycymeridae: ditto, vol. 24, 110. 1. pp. 8998.
O!NOMIKAOo. T. (1£38), Neogene Shells fromthe Vicinity of the City of Takasaki,
Gumma Prefecture, Japan: TrailS. Proc.
Pa/eotll. Soc. japan. nos. 11-12. pp. 87-~2.
OTUKt\. Y. (1955). On the Shizukawa Groupand Tertiary Crustal 1\Iovements in Japan(in Japanese): Bull. Earthq. Res. /11sl.
Tokyo Univ., vol. 33. pt. 3. pp. 'H9-469.
OZAKI, H. (1954), On the Paleuntology of tile
Basal Conglomerate of the Pliocene in
Choshi City, Kanto Region: Bull. Nat. Sci.
Mus. (Tokyo). N. S .. vo/ 1, 1101. pp. 9-20.
YoKoYAMA. M. (1925). Tertiary !vlollusc.'l.
from Shinano and Echigo: jour. Fac. Sci.
Imp. C!niv. Tokyo, sec. 2, vol. 1, pt. 1. pp.
1-23.
- - (1926), Tertiary mollusca from Shiobara
in Shimotsuke: ditto. vo/. 1. pt. 4. pp. 126138.

272

Saburo KANNO

Explanation of Plate 38(All figures in n~ttural size unless otherwise stated.)
Figs. la-b. G/ycymeris itle11sis KANNO. n. sp., (Holotype)a. Apical view, h. Right view.
Figs. 2. Glycymeris ide11sis KAJSNo n. sp. (l'arat~tpe ). apical view.
Figs. 3 a-b. G/ycyme1is ide11sis K,\NNO, n. sp .. (Paratype)a. Left valve, b. Hinge plate and teeth of the same. x 1.5
Fig. 4·. G/ycymeris ideusis KANNO n. sp., (Paratype). inner surface of the left valve. x 1.5
Fig. 5. Glycymcris idensis KANNo n. sp.. (Paratype). right valve.
Figs. 5a-b. Glycymeris compressa KA!\No n. sp .. (Holotype)a. Apical view, b. Right valve of the same.
Figs. 7a-b. G!ycymeris compressa. IC\NNo. n. sp., (Paratype)a. Apical view, h. Left valve of the same.
Fig. 8. Glycymeris compressa K,\NNo, n. sp., (Paratyve), inner surface of the left valve. x 1.5.
Figs. 9a-b. Glycymeris jlabellata K,\KNo. n. sp. (Syntype)a. Apical view of the left valve. b. outer surface of the same.
Figs. 10, 12.13. Glycymcris flabellata KAN:-;o. n. sp. (Syntype)Fig. 11. G/ycymeris flabcllata KM~No. sp., from the Chichibu Basin.
Figs. Ua-c. Glycymeris osozawcmsis KANNo. tL sp .. (llolotype)a. Outer surface of the right valve, b. Inner surface of the same, c. Apical view of thesame.

Plate 38

S. KANNo: On Some Glycymerid Molluscs]a6a

S. Aoi<r photo.

2

3a

5

Trans. Proc. Palaeont. Soc. Japan. N. S., No. 2~. pp. 273-276, Pl. 39, Oct. 31. 1956.

302. ON FOSSIL DIATOMS FROM THE OIL-SHALE OF
YOSHIOKA FORMATION IN THE SOUTHWESTERNPART OF HOKKAIDO, JAPAN*KEI OSHITE
Department of Geology. Hokkaido Gakugei University, Hakoclate:lt:WJ:!~mi!!i~-B'i!f[li;JII"i<r>idlllJ:l't!fi~P<n·(I:-Elti~';l.:."?\ · c: fllll:lJ.Jt~·rJltJ' GMfto:>tl~~~lfi Lliclk~
t...L *ffl57J-(ti~Jkf-EV) t<n·c;t;,~t~:. (!JJ7tOzv:f0kt~;o:> to:> it, IJ Xl!i$~o:>:r1~1iWil!'i >b~:ff-t·7;,. ~0·c .:;tt~f.V)J1HrrJl'iVf~ltr~/iit(l)l~Jk/k~-c;J,;~~ t~;;tl?;tt~.
W =¥ ~.ft

The material dealt herewith was procured in October 1955. from the Miocene
Yoshioka formation at Yoshioka in
Southwestern Hokkaidil. In its lower
part there are oil shale beds which are
well exposed on the floor of the Yoslrioka river, 3 km. above the embouchure.
They comprise alternations of numerous
black muddy layers, 0.5-2 mm. thick, richin plant remains and thin tuffaceous
ones, 0.02-D.05 mm. thick, containing
diatoms, pollens, and silicoflagellates(Dictyoclta) in profusi011.
The diatom cells are usually brown
coloured. not well preserved but 15
species. 1 variety and 2 forms in 12
genera were distinguished. They are
all freshwater forms but one true
marine and brackish form. From thefoss·il assemblage the o'il shalP- beds are
considered to have been deposited in anenvironment where fresh atld salt water
are mixed, or perhaps in shallow brackish
water W'ith forests in the hinterland.
The material is kept in the department of geology, Hokkaido Gakugei
University at Hakodate.
The writer tenders his cardinal thanks

to Prof. Y. SAsA. Prof. K. Ht~ziOKA, Prof.
T. IsHIKAWA and Mr. S. UozU!\H for
their advices from various angles.

* Read Jan. 21. 1956; received Feb. 9. 1956

HVSTEDT (1930) :Description of species
kfclosira gnmulata RALFSHEURC!\ (188~):

Synopsis, pl. 87. fig 17.

Cell cylindrical, 6-8 f£ in diameter,puncta 11-13 in 10 J.L on girdle.
This is a very common species in fresh
water, most abundant in the present
sample.
A1closira gnmulata fo.
curvata GRur-:ow
HrsTEDT (192i):

Kieselalgen. fig. 80.

Cell cylindrical, slightly cuned, ca.
6 J.L in diameter, puncta 9-10 in 10 fL.
This is a very common species in fresh
water, very abundant in the present
sample.
L)•clotclla striata (KuTz.) GRUNow
Pl. 39. fig. 2.

273

Kieselalgen, p. 34'1·. fig. 176.

274

Kei OSHITE

Cell disk-shape, 20-25 ft in diameter,
radial striae ca. 12 in 10 ft.
This is a common species in brackish
and marine water, not rare in the present sample though often fragmental.
Fragilaria construeus GRuNow
HUSTEDT (1930):

HEllRCK (188!):

Length of cell about 16 /J., width 8 p.,
striae 8-9 in 10ft.
This is a common fresh water species,
rather common in the sample.
Rhoicosphcnia czwuata GRUNow

Diatomeae, p. 156, fig. 670.

Cell long panduliform, 20ft in lengthand 5-6ft in width, striae parallel. 12
in 1011..
This is a fresh water species, rarely
found in the sample.
Sytzedm Goul ardi ( BRERissol")
GRUNOW

Pl. 39. fig. 6, 7.
HEURCK

Synedra ulna E11R.
Pl. 39, fig. 8

HEURCK (1884):

Synopsis, pl. 38, fig. 7.

Length of cell 160-200 f-1-, width about
3 11.. striae parallel, 14-16 in 10 fL.
This is a common species in fresh
water, in the present sample common
and often fragmental.
Sy1ledra Vauclwriac Kthztl"G
HEURCI\ (1884.):

Synopsis, pl. 40. fig. 19.

Length of cell about 20 11.. width 4ft,
striae 13 in 10 fL.
This is a common fresh water species,
common in the present sample.
Aclmantllcs lcmceolata(BRimtsso:-;) GRur-;ow(1884):

Synopsis, pl. 26, fig. 1-3.

Cell curved edge-shape, length 30-50 ft,
width 1Q-12 JL, striae 12-13 in 10ft.
This is a fTesh water form thoughsometimes found in brackish water,
rather common in the present sample.
Coccoueis placentula var. liucata

01\t:No (1952) : Aths, pl. 10. fig. 5.

Cell long lanceolate, length 60-75 ft,
width 6-8ft striae 10-11 in 10ft.
This is a fresh water species, common
in tJ~e present sample.

Synopsis. pl. 27, fig. 8.

(EHR.) CLEVE
PI. 39, fig. 1
HUSTEDT (1930).

Diatomeae. p. 348. fig. 803.

Cell elliptical, length 30-35 ft, striae
15-20 (transverse) and 13-16 (longitudinal) in 10ft.
This is a common and widely distributed species in fresh water, rather
common in the present sample.
Navicula {Wglica RALFSHEURCI< (1884):

Synop:;is. pl. 4. fig. 6.

Cell elliptical, end subapiculated,
length 46 f-1-, width 13ft, striae 11-12 in
10ft.
This is a fresh water species, rare inU1e sample.
Navicula lanceolata Ki.iTztr-;c
HEURCI<(188·1):

Synopsis, pl. 8. fig. 16.

Cell Janceolate, length about 40 p.,
width LOft, striae 14 in 10 p..
This is a fresh water species, rather

On Fos:oil Diatoms from the Oii·Shale of Yoshioka formationcommon in the present sample.

Pimzu!aria esox fo. major HusTEDTOKUNO (1952):

Alias, pl. 26. fig. 14.

Cell long elliptical with round end,
length 120J.L, width 25f.L. costae 7-9 in 10J.L.
This is a typical fresh water species,
rarely found in the sample.

275

Synopsis, pl. 32, fig. 6-8.

HEURCI\ (188!):

Cell sl-ightly arched. end attenuate
and recurved. length 40-GO J.L, width 1015 J.L, costae 6 and areolae 1D-12 in 10 J.L.
This is a fresh and brackish water
species. common in the sample.

Epithcmia zelwa (EHR.) KliTZI!\GPl. 39. fig. 4

Amphora ovalis KuTZI'>G
Synopsis, pl. 1, fig. 1.

IlEURCK (1884):

HUSTEDT (1930):

Dintomeae. p. 384, fig. 729.

Cell ellipt-ical, length 35 J.L, w·idth 17 f.L,
striae 14 in 10 J.L.
This is a common fresh w:1ter species.
rare in the sample.

Cell slightly curved with round end,
length 60-70 /t, width 15 J.L, costae 3-4,
areolae 10 in 10 f.L.
This is a very common in fresh water,
not rare in the present sample.

Cymbella cistula HI-::..IPRICH

References

Pl. 39, fig. 3
HUSTEDT (1930):

Uiatomeae. p. 363, fig. 626.

Length of cell 80-100 J.L, width 20-30J.L,
striae 8-10 and puncta 15-20 in 10 J.L.
This is a very common and widelydistributed species in fresh water, rather
common in the sample.

Cymbella par/Ja ( W. SM.) CLEVE
HUSTEDT (1930):

Diatomeae, p. 363, fig. 675.

Length of cell 6Q-70 J.L, \Vidth about
15 f.L, striae 9 in 10 J.L.
This is common fresh water species,
abundant in the present sample.

EPithemia sm·cx KtiTZINC
Pl. 39, fig. 5

AI\ATSUKA. K. (1914),

Plankton Diatoms near
Takashima. (in Japanese). Bull. Fish.
Reser. Hokkaidu. vol. 8.
CLEVE, P. (1894-95). Synopsis of the Naviculoid Diatoms. Part 1-2.
HEURCK, II, (1884). Synopsis des Diatomees
de Belgique.
HUSTEDT. F. (1927). Die Kieselalgen Deutsch·
lands, Oesterreich und der Schweiz mit
Beriickschtigung der iibrigen Hinder
Europas sowie der angrenzende Meeresgebiete. I-lL
- - . (1930). Bacillariophyta (Dintomeae).
Zweite Auflage.
ICIIIKAWA. W. (1955). Fossil Diatoms foundin the Kayama clay-shale on the outskirtsof Kanazawa city. Trans. Proc. Palacont.
Soc. ]apa11, N. S.. No. 4.
KOKURO, S. (1956). Plankton Diatoms.
OKUNo. H. (1952), Atlas of Fossil Diatoms
from Japanese Diatomite Deposits.

276

Kei OSHITE

Explanation of Plate 39
Fig. 1.
Fig. 2.
Fig. S.
Fig. 4.
Fig. 5.
Fig. 6. 7.
Fig. 8.

Coccotteis placentula var. lineata (EHR.) CLEVE x 1500.
Cyclotella st1·iata (KiiTZ.) GRUI'<OW x 1500.
Cymbella cistula l-IEI\1PHICH x 1500.
Epithemia zcbm (Elm.) KtiTZING x 1500.
E. sorex KtiTZING x 1500.
Rhoicosphenia cttrvata CnUNOW x 1500.
Sy11cdra ulua EIIR. x 1500.

Plate 39

K. OsHITE : Fossil Diatoms from Yoshioka, Hokkaido Formation

1

4

8

6

5

Trans. Proc. Palaeont. So:. Jap:.tn, N. S., No. 2-L pp. 277-284, p1. 40. l text-fig., Oct. 31. 1956.

303.

MISCELLANEOUS NOTES ON THE CAMBRO-ORDOVICIANGEOLOGY AND PALAEONTOLOGY, XXVISUPPLEMENTARY NOTES ON THE CAMBRIAN TI{ILORITESFROM SOUTHEASTERN ASIA*
TEIICHI KOBAYASHI
Geological Institute. University of Tokyo*':if!m r :; -r jlfi~liti:C:::fi!Uillitic. : -r :; 7:/&mr.i:l(l)ll¥iit?lHt ~ ?t :t.~ ;/ :;;o -dtffii(l) 3Nl!ltu:> ilMlrcllEJ'RAT 71: 1- ;I' q-- ;l'~ifj.!J:f0~~*iJ' I? tfm Lt.:=.: 'llii.Jh u:> ') -t;, 1.:. P/ethopellis sauri11i ~~7:> ') o

1 ~fili 2 oi1i!llilili~t!Jtr 10 ffl!iJ:JiilgU¢lLt.:o 'it:. Amzamitia spirifero l:(~j)1ffiliJillltli'Utli0fJI!tJ;~~0
illt~AAl:.~1711litH.>~ 9 ffii"'-c9l!~ft"'-7.>:. t t!flJ-:>t.:o'1' 1* !!.l:-

On the occasion of describing some
Lower Cambrian trilobites from Yunnan.
I have discussed the Cambrian faunasof Haut-Tonkin in some length (1934,44). Lately Dr. E. SAUR!t-;, Director of
the Service geologique et Laboratoire.
Centre National de f~echerches Scicntitiques ct Techniques at Hanoi, VietNam, kindly sent me some trilobites
collected from the Changoung series on
the Tonkin-Yunnan border by DEPRAT
and two photographs of FRmtAGET's
Asaplziscus aff. grcgm·ius from thevicinityof Melpourey, Cambodga.
Before describing the results of mystudy on them, I record here my
gratitude to Dr. SAtJRJN for his courtesy.
I.

Asaplliscus

aff. gregar-ius
FROMAGRT from Cambodga.

Cambodga whence FRoMACET and BoNELLI (1932) (see also FRnMAc;ET, 1941) has

reported the occurrence of Asaphiscus
aff. gregarius in a horizontal quartzose
shale bed on the Inuosinian massif_l>
There are two photographs of thistrilobite at hand, one in natural size
and the other about two and a halftimes magnified (Fig. 16). It ·is a nearlycomplete shield, but unfortunately its
cephalon not well preserved.
Dorsal shield subelliptical in outline,
but perhaps twice as long as broad andsomewhat broader on the anterior thanon the other side. Dorsal furrows on
the cephalon deep and seemingly subparallel to each other at least on theposterior part; glabella distinctly elevated above cheeks and unfurrowed except
for a faintly impressed occipital furrow:right eye apparently located at the midlength of the cephalon. Thorax composed probably of nine (?) segments;
axial ring convex, almost as wide as
the pleura. Pygidiurn two-thirds aslong as broad, trilobed by a pair ofprofund furrows and surrounded by anarrow depressed border; only the firstby

Insofar as I am aware, the southernmost locality of Cambrian trilobites in
As·ia may be Melpourey in northern* Received Feh. 27. 195fi; read Oct. 6. 1956.
1)

According to Dr. SAURIN the trilobite
was collected from the vicinity of Thai·

abrioat near Stung Treng, which is locatedabout 80 km ESE of Melouprey.

277

278

Teiichi KOBAYASIII

furrow discernible on the pleural lobe.
The thorax and pygidium measure
about 12.5 mm. in total length andabout 8.5 mm. in breadth.
Such a cylindrical glabella is foundin Psilaspis (Entomclu:~) shautungcnsis
KoBAYASHI (1955), but the associatedpygidium is much broader and the axial
lobe narrower, if compared with the
Melpourey form. In the outline of thepygidium this resembles '' Anomocarclla" tatiau W ArcoTT, but again
they are different "in the breadth of theaxial lobe. In the general aspect thisshield looks very similar to Blai11ia
grcgarius '·VArcoTT which is a common
member of the Maryville limestone at
the top of the Middle Cambrian in theAppalachian mountains. In that species,
however, the glabella somewhat tapers
forward, the thorax has a little narrower
ax·is, and the posterior margin of thepygidium is transversal or even sinuated. Nevertheless I agree with FimMAGET to contend that it bears close affinity
with Blainia.
In the above description I suggested
nine for the number of thoracic
segments. because the terminal band of
the thorax ap~ears broader than theseventh segment, but the photographs
are not clear enough to warrant theexistence of the eighth and ninth
segments ·in this space. Assuming it
to be an octasegrnented trilobite, itsalliance to certain asaphids, such as
Clzarchaqia TRoEnsso~. 1937, l!.oasaphus
KoBAYASHI, 1936 (i.e. A1w1·iua WHITE·HOUSE, 1936) and Jsofc[o£dcs RA YMllN!>,
1910, is undeniable. In Charclzaqia theglabella is cylindrical. but its thorax ismuch shorter in proportion to the pygid1um and the axial lobe narrower. In
Liostracus (?) superstes LIN:-;ARSSnN, thetype of Eoasap/ms, the glabella is tapering forward. thelaxis of the thorax

narrower and the pygidium broader
than in the Melpourey form. In lsoteloides whitficldi RAYMOND, the type speciesof lsoteloidcs, the axis of the thorax isnearly as broad as that of the Melpourcy
form, but the pygidium is relatively
long and the glabella teretely conical.
Without seeing the specimen, it isdifficult for me to say whether it ismore allied to the Asaphidae or the
Asaphiscidae, but I think it quite probable that it is an ally to Blainia, if
not a primitive member of the Asaphidae. The age of the trilobite suggested from its general aspects is in arange from late Middle Cambrian toearly Ordovician.
Incidentally, "fucoidal" impression isreported to occur in a dark gray shaleor slate on Phuket island on the west
coast of Peninsular Thailand. DuNcAN
suggested Eophyton for it and noted thebelonging of MANSIIY's Planolites (?)
from the Lower Cambrian of Yunnan
to the same kind. Neither a description
nor an illustration of the Siamese specimen appears as yet published. The occurrence of Planolites is reported also by
PATTI\ (1927) from southwestern Tonkin.
Plmto/ites is, however, widely ranged
as a genus. P. uulgaris is its typespecies which was described by NicHoLsoN (1873) from ti1e Clinton group.
Plmtolitcs corrregatus is an enigma
discovered in the Beltian of Montana.
Phuket Island is located more southerly than Melpourey and the Phuket
series which yielded the fucoidal impression is tentatively referred to theCambrian system by BRoWN and others(1953). It is, however, desirable thatthe chronology is confirmed by any
fossil other than such a problematicum.

Miscellaneous Notes on the Cambro-Ordovician Geology and PalaeontolOh'Y. XXVI

Some 'l'rilubites from thl~ Changpoung Series on the Yunnan-'l'onkin
Border.
In a small lot of specimens from four
localites are distinguished 10 species oftrilobites as t<l.bulated below.
The specimens before band 2.re mostly
not so well preserved, as may be understood from SAURtN's statement (in his
letter, Dec. 16, 1953) that "Ce sont lesreliquats de Ia faune etudiee par
MA:\St;Y.'' Supplementary notes are.
however, given here to his monu.
mental works in 1915 and 1916.
II.

Amtamitia spinifcra M .\NS!IY
Plate •lO. Figures 13-15
1916. Ptychoparia(Annamitia) spinifaa MA·

NSUY, 1\ffm. du Serv. gl'ol. de f /udochine.
Vol. 5, Fasc. 7, p. 25. pl. 3, til-(5. 4a·q.
19H. Annamifia spinifcra KoBAYASIII. Japan.
four. (;l'ol. Geogr. Vol. 19, p. 1:1:1, text·
fig. 2.

Four slabs from Penkai contain fiveshields in two of which, however, tubercles and spines are not \veil preserved.
As MAr-;suv mentions. the thorax iscomposed of 11 segments, but the last
one is not spiniferous as in his diagnosis.
T11e spine issues from the 7th segment
in a small shield (fig. 13) and from theninth in a medium and large ones (figs.
14 and 15). The medium sized one of
the three shields is just about the sizeof MA~suy's in figs. 4d and 4e having
the spine on the 7th segment. The
large shield is not much different insize from M,\r-;suy's in fig. 4c with aspine on the ninth segment. It is
certainly an interesting fact that theaxial spine changes its position fromthe 7th to the 9th segment of thethorax in the growth stage in which
the cranidium measures 6 to 7 mm. in
length.
On the pygidium of the large shield(fig. 15) tubercles are seen to be paired
Locality·--,~ ,. ~ ]-Changpoung Series on Yunnan·Tonkin Borderland

-~

J

8.
E 'I
§ ~ 10 I
d 81 I<'lI- - - - - - - - - - - - - - - - - - - - - - - - ,-1
X
1. Annamitia spillifera MANSUY-

Drepamtra kelferelz MoNKE. var.

I~---:-~---

2. Damesella brerJicmulata WALCOTT. var.
1 - - - - - - - - - - - - - - - - - - - - - - -- ,_:_

a.

I

=

I

X

I~

-

;;

' ~

)--~--:-- 3'___ 4_._D_or_Y_'fJygel/a sp. nov.
I
5.

Haniwa conica KonA_Y_A_s_I_II____-_-_-_-__

6.

Prosaukia angulata (MANSUY)=~= -~-;
I?

x ,-7.--E-o.-~a-u-k-ia-(-?)_w_a_/c~ltl-.(-!V-1~-N-s-t•_Y_)_______ / ? ~~-~-x- -__)(-, ~

I=

279

8.

Plethoplefis sauri11i KoBAYASHI. nov.

9.

Shirakiella sp.

10.

Koldinioidea sp.

!

I

I

x

li

::;J

~- -l~'=i-~_1

280

Teiichi 1\onAYASIII

on the third ring and the terminal lobe of
the axis as indicated in my restoration(1944).

Damesella brevicaudata WALCOTT, var.
Plate 40, Figures 9a-b.
Text-Fig.

This pygidium fits in Damesc/la b1·evicaudata (Korl:\YASIII, 1941-42) in mostfeatures except for the position of longspines. Among 7 pairs of marginal
spines the first and fourU1 are longer
than the others in this variety whereas
the first and fifth spines are elongatedin the typical form.

Drepmmra kctteleri Mo~KE. var.

Dorypygcl/a sp. nov.

A tiny cranidium has the frontal rim
strongly bent as in Teiuistion !ansi
Mo:\KE (1903) and T. mo11kei KoBAYASHI(1955). but it is typical of Dorypygellain its long conical glabella. two pairsof oblique lateral furrows in addition
to a tr:msverse occipital one, medium
sized eyes at the mid-length and highly
oblique eye-ridges running across the
fixed chcel<s of moderate breadth.

Plate 4{), Figure 101916. Stepha11ocare (?) monkei MANSUY, non
WALCoTT. Mcm. Serv. gco/. f!lldochilleVol. fi, Fasc. 1. p. 19, pl. 1. fig. 30.
1931. Teinistion typica/is KoBAYASHI. non
MaNKE, Japan. four. Geol. Geogr. Vol.
8, p. 176, pl. 20, fig. 17, non. fig. 20b.

A pygidium from Kiaotieou belongs
to an identical species with !\'lANsuv's
from Changpoung and probably my
pygidium of Teinistion t;ypicalis (?)from
Hualienchai.
They are similar to
MoNiu:'s Tcinistion !ansi in the broad
outline and wide divergence of longspines in the first pair. There are 5 or
6 more pairs of flat spines or serrations
which are different from MmlKF.'s aswell as Drepanura premesnili's, but
agree with D. lwtteleri's in the diminishing size from anterior to posterior.
In the relatively broad axial lobe thisagrees better with D. lwttclai thanwith the other allies.

Dorypygella sp. nov.
Plate 40, Figure 11. Text-figureI-1 aniwa cmtica KonA y ASH!
Plate 40. Figum R
1935. llaniwa conica KoBAY.\Sill. four. Foe.
Sci., Imp. Univ. Tokyo, Sect. 2. Vol. 4,
Pt. 2. p. 245. pl. 7. fig. 4.

This is a Haniwa having a truncatoconknl glabella which is a little broader
than in the type of H. conica but on
which lateral furrows are well impressed
as in the type. In the outline of theglabella it resembles 11. sosmtcnsis, but
the preglabellar area is evidently more
expanded and divided into a narrow
rim and long limb, instead of two partsof equi-length in H. sosanc1tsis. The
narrowness of the glabella and thesl1allow concavity of the preglabellar
area in the type specimen of H. conica
depend possibly upon lateral compres·sion. I ha\'e previousely suggested
Hmziwa for MArssuv's Ptyclwspis sp.
from Dongvan with query, but theoccurrence of the genus in the Changpoung series is now warranted.

l'liiscellaneous Kotes on the Cambro-Ordovician Geology and Palaeontology, XXVI

Prosaukia angulata (MANSTJY)
Plate 40. Figure 12.
1915. P!ychaspis angulata MANSUY, !v!Cm. Serv.

g<;ol. /'brdochine. Vol. 4, Fasc. 2, p. 21,
pl. 3, figs. 2a-v.
1916. Ptychaspis m1gulata MANSUY. Ibid. Vol.

5. Fasc. 1. p. 34, pl. 5, figs. 12a-e. pl. 6,
figs. la-d.
1931. Ptyclzaspis angulata KoBAYASITI. Japan.
four. Ceo/. Ceogr. Vol. B. p. 182. pl. 21.
fig. 13.
1933. Prosaukia angulata KoBAYASHI. Japan.
four. Ceo/. Geogr. Vol. 11. p. 125.

The cephalon and especially the preglabellar area reveal the typical aspectsof the genus. The associate pygidium
is also diagnostic in the presence ofthe pleural and intcrpleural furrows,
but the anterior outline is more trans·versal than any of the genus in North
America.

Eosaukia (?) walcotti (MANSUY)
Plate 40. Figures 1-4
1915. Ptyclzaspis walcolli MANSUY. /vf,'m. Sen•.
gcol. l'/ndochine. Vol. 4. Fuse. 2. p. 22.
pl. 2, Jigs. 16a-b, pl. 3, figs. la-z.
1916. Plychaspis walcotti MANSUY, ibid. Vol. 5.
Fasc. 1, p. 33. pl. 5, Jigs. 10a-j, lla-b.
1924. Ptychaspis

walcotti. SUN, Palaeontol.
Siuica .. Ser. B, Vol. 1. Fasc. 4, p. 68. pl.

5. fig. 2.
1931.. Ptychaspis walcotti KanA Y ,\SilL Japan.
four. Ceol. Geogr. Vol. 8, p. 18:-l. pl. 22.
figs. 18-19.
1933. Calvinella walcotti KoB.-\YASHl, Ibid. Vol.
11, p. 129.

There are several specimens from
Penkai, Changpoung and Dongquanamong which a cranidium from Changpoung \.fig. 4) is as long as 20 mm. A
cranidium and free cheek are foundtogether in a specimen from Dongquan281(fig. 1). A pygidium from Dongquan(fig. 2) has the triangular broad outline
as that in fig. lw, pl. 2, in MANSUY,
1915. Because it is so different from
Calvinclla or any other genus of the
Saukinae in North America, the reference of this species to that genus is aquestion.
This pygidium is more allied to thatof Qzeadraticephalus as well as Eosaukia.
E. latilimbata is the monotypic speciesof the latter genus and its pygidium issaid by Lu (1954) to be M·oadly transverse. semicircular, instead of triangular.
His species is represented by an internaland external mould of a shield which
is depressed from anterior to posterior.
It is probable that such a form as
walcotti was derived from the earlyUpper Cambrian stock including Eosau-

llia.
Plcthopeltis sauritti KoBA Y ASH!,
new species.
Plate 40. Figures 5-7.

Description :-Cephalon gently convex ;glabella only slightly elevated above
the general curvature of the cephalon,
fairly large. subquadrate. outlined bydorsal furrows ; lateral furrows, if present, very faintly impressed; posterior
pair of the furrows confluent on theaxis ; occipital furrow not strong, but
always present; occipital ring somewhat
thickened in the middle!; eyes relatively
small, located at the mid-length of the
cephalon and close to the glabella;frontal limb and rim undivided, or if
divided, the frontal furrow is very
weak Free cheek relatively broad,gently convex and inclined laterally
without any interruption of a marginal
furrow; genal spine present. Facial
sutures divergent for- and back-ward

282

Teiichi KoBAYAsHI

trom the eyes ; their anterior branches
swinging inward near the anterior
margin; posterior branches nearlystraight, diagonal, outl·ining a large
posterior limb of the fixed cheek.
Pygidium semicircular, but the anterior margin is gently arcuate: axial lobe
composed of 3 or 4 rings and a term'mal lobe, conical, elevated above theslightly convex pleural lobes ; threepleural furrows distinctly seen on eachside of the axis: interpleural furrows
faintly impressed on the two flatanterior pleurae.
Test smooth.
Comparis01t :-As discussed elsewhere(KonA v ASH!, 1943), there are some 7 or
8 species of Pletlzopeltis. A solitary
representative of the genus ·in Asia has
been P. stenorlzaclzis from Siberia having
an unusually small glabella. The present species is very similar toP. bueh/eri
UrRJCII (1930), but the occipital ring
narrows more distinctly and fixedcheeks are less developed in thatspecies.

Slzirakiella StJ.
from Penkai is almost identical with
Attomocarella sp. (?) by MANSUY, 1916.
Koldi1lioidia sp.
is represented by a cephalon and pygidia from Dongquan, but they are poorly
preserved.
References Cited
BRoWN, G. F. et al. (1915). Geologic Recon·
nais3ance of the Mineral Deposits ofThailand. U. S. Geol. .<:ut·v. Bull. .984;(1953). Ibid. Geol. Surv. Mem. 1, Roy.
Dept. Mzms, Thailand.
FROJ\IAGET, J. (1941 ), L'lndochine Fran~aise,sa Structure geologique. ses Roches, ses
Mines et leur Relations possible avec Ia
Techtonique. Bull Serv. giol. I'Itrdochi11e,Vol. 26, Fasc. 2.
- - and BoNE!.l.l. F. (1932). A propos desmateriaux d 1Angkor et sur quelques points
de Ia Stratigraphie et de la Structure
geologique du Cambodge septentrional etoriental. C. R. Acad. Sc. Tom. 195, p.
538, 19 Sept. 1932.
KoHAYASHI, T. (1931).
Studies on theStratigraphy and Palaeontology of theCambro-Ordovician Formations of Hua·lienchai and Niuhsintai, South Manchuria.
]apa11. four. Geol. Geogr. Vol. 8.
- - (1933), Upper Cambrian of the Wuhu·
tsui Basin, Liaotung, with Special Reference to the Limit of the Chaumitian (orUpper Cambrian) of Eastern Asia. and
its Subdivision. Ibid. Vol. 11.
- - (1935), The Camhro·Ordovician Forma·tions and Faunas of South Chosen, Palaeontology, Pt. 3. Cambrian Faunas of South
Chosen with a Special Study on the
Cambrian Trilobite Genera and Families.
four. Fac. Sci., Imp. lf11iv. Tokyo, Sect. 2,
Vol. 4, Pt. 2.
- - (1936), Three Contributions to theCambro-Ordovician Faunas. ]ap.111. four.
Ceo/. Geogr. Vol. 13.
- - (1941-42), Studies on Cambrian Trilobite Genera and Families, 1-4. Ibid. Vol. 8.
- - (194Sa), Cambrian Faunas of Siberia.
four. Fac. Sci., Imp. U11iv. Tokyo, Sect. 2,
Vol. 6, Pt. 12.
- - (1943b), Outline of the Cambrian Systemin the Yangtze Basin, 1-3. Proc. Imp.
Acad. Vol. 19.
- - (1944), On the Cambrian Formations
in Yunnan and Haut-Tonkin and the
Trilobites contained. Miscellaneous Notes
on the Cambro·Ordovician Geology andPalaeontology, No. 16. japan. four. Geol.
Geogr. Vol. 19.
- - (1955). Notes on Cambrian Fo3sils
from Yentzuyai. Tawenkou. in Shantung.
Trans. Proc. Pal. Soc. ]apa11, N. S., No. 20.
LU, Yen·Hao(1954).
Upper
Cambrian
Trilobites from Santu. Southeastern
Kueichou. Acta Palaeontol. Sinica, Vol. 2,
Pt. 2.
MANSUY, H. (1912). Etude geologique deYunnan oriental. Mt'm. Sen•. gl:ol. f ltzdochine, Vol. 1, Fasc. 2.
- - (1915). Faunnes cambriennes du Haut

Miscellaneous Notes on the Cambro-Ordovician Geology and Palaeontology, XXVI
Tonkin. Ibid. v'ol. 4. Fasc. 2.
MANSUY, H. (1916), Faunes cambriennes de!'Extreme-Orient Meridional. Ibid. Vol. 5,
Fasc. 1.
MoNKE. H. (1903).
Beitriige zur Geologie
von Schantung. 1. Obercambrische Trilobiten von Yen-tsu-yai.
fahrb. kiinigl.
preuss. geol. Landcsamt. u. Bergakad. fur1902. Bd. 23. Hjt. 1.
PATTE. E. (1927): Etudes geologiques dans!'Est du Tonkin. Bull. Serv. gi'ol. l'lndochitle. Vol. 16.
RAYMOND, P. E. (1910). Asaphidae from the
Beekmantown. Notes on Ordovician Trilobites, 2. illm. Carnegie Mus. Vol 7. No. 1.
STJN, Y. C. (192-!).
Contributions to theCambrian Faunasof North China.
Pa/aeontol. Sinica, Scr. B. Vol. 1, Fasc. 4.
TROEDSSON. G. T. (1937) : On the CambroOrdovician Faunas of Western Quruq tagh,
Eastern T'ienshan.
The Si11o-Swcdish
Expeditiou. Publicatio11 4.

283

ULRICH, E. 0. (1930), Trilobita in BRIDGE's
Geology of the Eminence and Cardareva
Quadrangles. J.\1/issouri Bur. Ceo/. Mi11cs.
Vol. 24. 2d. Ser.
and RFSSER, C. E. (1933). The Cambrianof the Upper Mississippi Valley, Pt. 2.
Trilobita, Saukinae. Bull. Pub/. Mus. City
Milwaukee. Vol. 12, No. 2.
WALCOTT, C. D. (1913).
The Cambrian
Faunas of China. Research in Chi11n,
Vol. 3.
- - (1914). Dikelocephalus and other Generaof the Dikelocephalidae. Smithson. Misc.
Coli. Vol. 57. No. 3.
- - (1916), Cambrian Trilobites. Ibid. Vol.
64, No.5.
WESTERGAARD. A. ll.
(1922).
Sveriges
Olenidskiffer. Sverig. Ceo/. Undersi;'k. Ser.
Ca. Nio 18.
WHITEHOUSE, F. W. (1~36). The Cambrian
Faunas of North-Eastern Australia, Pts.
1-2. Mcm. Queensland !.Ius. Vol. 11, Pt. 1.

28clTeiichi KoDA YASIII

Explanation of Plate 40
Eosaukia (?) wa/cotti (1\lANSUY).
Figure 1. Cephal on. x 2, Loc. Dongquan.
Figure 2. Pygidium, x 2, Ditto.
Figure 3. Cranidium. x2. Changpoung.
Figure 4.

. ....................... p. 281

Ditto. x 1. Ditto.

Plethopeltis saurini KoBAY ASH!. new species . ..

. .................................................. p. 281
Figure 5. 1-lolotype cranidium, x 2. Loc. Changpoung.
Figure 6. Paratype free cheek. x 1.5. Ditto.
Figure 7. Paratype pygidium. x 1.5. Ditto.
. ....................................................... p. 280
Haniwa conica KonA Y AS HI ...
Figure 8. Cranidium. x 3, Loc. Dongquan.
. ............... p. 280
Damcsella brevicaudata WALCOTT, var .............. .
Figures 9a-b. Internal and external moulds of a pygidium, x 2. Kiao-Tieou.
Drepatmra kette/eri MoNK E. var. ... ... .. . . ..
. ........................................................ p. 280
Figure 10. Pygidium, x 2, Kiao·Tieou.
.. ........................ p. 280
Dorypyge/la sp. nov.
. ................. .
Figure 11. Cranidium, x 5. Changpoung.
Prosaukia angulata (MANSUY) . . . .. . .................... .
.. ................... p. 281
Figure 12. Pygidium, x 1.5. Dongquan.
Amwmitia spinijera MANSUY......... .............
.. .............................. p. 279
Figure 13. Clay-cast of a cephalon and thorax with an axial spine on the 7th segment,
x4. Penkai.
Figure 14. Clay-cast of a cephalon and thorax: with an axial spine on the 9th
segment. x 3, Ditto.
Figure 15. A thorax: with an axial spine on the 9th segment and a pygidium withpaired tubercles on the :1.x:ial lobe. x 3. Ditto.
Ba/iuia (?) aff. gregarious WALCOTt', by FROI\IAGET .. ..........
.. .......................... p. 277
Figure 16 Dorsal shieid, x 2.5. Loc. Melpourey.
All of the specimens illustrated in figures 1-15 were returned to Prof. E. SAURIN of
the Faculte des Sciences at Saigon. in Viet-Nam.

Plate 40

T. KoBAYASHI: Cambrian Trilobites from Southeastern Asia

3

1

5

2

8

4

6

H : ".
.~~L~·
Jllj
;
~

il:

~~·
. · · • · ..

·~

.~

•

£

'~
~

a .·

11

9b

7

9a

12
10

13

15

14

16

Trans. l'roc. Palaeont. Soc. japan. N. S .. Nu. 24·, pp. 285-289, Pl. ·ll. 1 text·fig .. Oct. St. 1956

304. A MIOCENE STEGOLOPHODON FROM YATUO GROUPIN TOYAMA PREFECTURE~
TOKIO SHIKAMA
Geological Institute, Yokohama National University
and

YOSHIHlRO KIRII
6s::nvano 1\Iiddle School. Toyama Prefecture

Utlil!t~At6\"il!fi!tV"J 'f!tlifi!: Stegolophodotl: 'Mill*~$i.lf6!,lAM1'~:ttifiHit t ltlliiliJII~t:\\V"JJ:mJII:lm:k?R!l!Jii!J~A J: IJ ~~0hi..:~t¥Ht::£:dt.
V"J~Illi:ll.:{l7.-t-6·'i1if;!l·c

S:$:4'~11!:~ 3 V"J

Mastoc1or,t ·e, /a/idem l: pseudolalideus

Stego/ophodoJI lsudai t U..:o ~.(Bj(V"J(;t:ji .1:.!1:!/!I.:J: IJ. 'ii'BV"J(lJiiHilfttl!lt§:?<livJ:}j 1-'iM)l~(l.: .J: IJ 5£Ji!. 0/Lt..:o !tJI)I~Hti'I!:Efl'*f:.\ZV"J/\!Ii,mt'\\.l:.ffil~.l~iiftl;ft-'-RfiUV"J;Mi~ffiSV"J J:~.Uitll-i}llJ;;ftve
lllWiJit,17~ ·lf~:JI'~I\Y:GJiJ;ri·c:t,7., 0

Of the Japanese Miocene proboscidea,
Scrridcutinus mmectcus (MATSUMOTO)
and Stcgolupfzodon pscudolatideus (Y.um)
are the best known and the most fully
described species, of which the former
is firstly described by MATStJMoTo under
the generic name of /Jcmimastodon fora type specimen from the Hiramaki
formation of Banzyo-bora, Kaminogumura, Gilm Prefecture, and the latter isalso described by him under the nameof Prostcgodon latidens (CI.IFT) for a
specimen from the Tiganoura formationof Siogama, Miyagi Prefecture. MAKIYAMA described a fine lower jaw ofmmec/cns from the .Hiramaki formationof Banzyo-bora. The elephant known
as latidcns was added by Y ABE withnew materials from Siogama and Hunaoka-mati, Sibata-gun, Miyagi Prefecture(Tukinoki plant bed) ; he proposed newgeneric and specific name, Eostcgodon
Pst:udolalidcl/s, for this archetypal stegodont. Besides these, the senior author*Read Jan. 21. 1956; received l\larch2, 1956.

once described a fragmental cheek tooth
under the name of Pcntaloplzodou (?)
sp. from the Domi formation of Hosoya,
Mii-mura, Hodi-gun, Isikawa Prefecture.
In November, Hl53, I. MuHAKAMI, thena mere boy student of the Osawano
Middle School, found a proboscidean
tooth at floor of a tributary of the Zinzu
River, in Suwara, Kurosedani-mura, Nei·gun, Toyama prefecture, and the juniorauthor, moreover, found a fragment ofa limb bene at the same site. In June,
1954 the second specimen of a cheektooth was found by K. HAslllT.\, a worker
of Maeda Kensetu Company, at an excavating place of a culvert on the rightbank of Zinzu River, at Kasuga, Osawano·mati, Kamisinkawa-gun, Toyama
Prefecture. This locality is 500 m northeast to the first locality above mentioned. F urtherrnore, a fragment of atusk was found by a dam construction
worker from a bottom of Zinzu Riverat Suwara. These specimens were sub·mitted for study to the senior author,
who in August, 1954 visited the localities
285

:!86

Tokio SHIIC\1\IA and Yoshihiro KIT<II

and made some field obscrvaticns with
K. TsuDA of Niigata University and thejunior author. The specimens now athand, the third distinct representativeof the Japanese Miocene proboscidean
belonging to Stegoloplzodon, are comprised this short article.
According to TsuoA, the formationfrom which the specimens were obtainedis the lower part of the Kamilmrosedanialternation member of the Kurosedani
formation which constitutes the upper
part of the Yatuo group. The Kamikurosedani alternation member is 90:no m thick, largely consists of alternation of sandstone and silt, cor:stitutes
the basal part of the Kurosedani formation, overlies the Iwaine formationof pyroclastic and green tuff members.
and underlies th~ Kakehata alternation
member ; this member in question carries
in its basal part many cobbles andboulders of andesite, and bears somemarine fossils such as Proturotella
yuautanie~zsis M.n.K., Vicaryclla sp. andAstriclypeus mmmi V ERRlL. etc. At
Suwara, the site which bore the proboscidean specimens is about 2m above
the upper surface of the I waine formation. At Kasuga the fossil bearingsite is composed of grey silty sandstone
bearing many silicified woods andstamps. which are sometimes filled with
pyrite, calcite and sulphur. TsunA
regarded the Kurosedani formation to
be middle Miocene in age.

Stegulophodon tsudai n. sp.
Pl. '11, fig,;. l-6

Cotypc :-Upper left M3 from Suwara,
stored in Geological Institute, Yokohama
National University: plastotype of which.
in Natural Science Museum. Tokyo andin Osawano M'idclle School. Upper rightMl from Kasuga belonged to HAStltTA,

plastotype of which, in Geological Institute, Yokohama National University. A
fragment of upper incisive tusk, stored
in the same institute.
Localities :-Suwara, Kuroscdani-mura,Nei-gun, Toyama Prefecture and Kasuga
6!;awano-m2.ti, Kamisinkawa.gun, Toyama Prefecture.
Horizon:- Kamikurosedani alternation
member. Kurosedani fonnation of Yatuo
group ; Middle Miocene.
Diagnosis :-Upper incisive tusl' laterally co111pressed with both of the lateralband of thin enamel layer. Cheek teeth
intermediate in size between those oflatidcns and pseudolatidws. Ridge formula of upper 1\11 If2-4-lj4 (?); thatof upper M3? -5-I/z. Basal cingulawell developed: buccal cingulaum laminated and lingual one tuberculated.
Distinct conulet present between firstand second ridge of upper M 1. Medianlongitudinal cleft of crown rather weakin development. Anterior ridge ofupper rvl 3 parallel to one another but
posterior ones twisted. More developed
than p~eudolatideus but more archetypalthan latide11s.
Descriptions :-Upper left M 3. Provided
with five ridges, hind talon and basal
cingula. Anterior part well worn off
and foro three ridges exposing dentine
islets. Ridge formula ?-5-112; about
142 mm in median longitudinal lengthand 75 mm broad at second ridge where
tooth is at its broadest. In upper view,
tooth tapers backward ; buccal margin
more strongly curved than lingual margin ; posterior margin obtusely pointed
backward. At basal cingula on lingualside, conulets blocking valleys between
second- and tlrird ridges or between
third- and fourth ridges, wh·ile there areno such cm1ulets on buccal side. Firsttwo ridges parallel to one another andposterior ridges twisted or curved back-A l\Iiocene Stegolophodon from Yatuu Group in Toyama Prefectureward. First ridge tolerably damaged
and enamel wall preserved only at
posterior- and buccal sides. the formerof which closely in contact with anteriorwall of second ridge; dentine islet seems
to be quadrate and broader in fore-&aft direction than that of second ridge.
Buccal part of second ridge partly
damaged; posterior enamel wall nearlyin contact at median port·ion withanterior wall of third ridge, which alittle below grinding surface ; dentine
islet subquadrate, slightly expanded on
both buccal and lingual ; enamel wall
thick, rugose and with no distinct crenulation. From third- to fifth ridges there
is seen a feeble medil;1.n longitud·inal
cleft. which situated a little outward
turn and divides dentine islet of third
ridge into two discs. Its posterior walla little larger m;d more strongly crenulated than anterior; dentine islet elongate oval, moderately pointed towardboth buccal and lingualsides ; enamelwall thicker and more rugose than thatof second ridge. Fourth ridge strongly
curved backward, consists of mammillae
which worn and show four dentine ·islets;
median mammilla the largest : anteriorGreate5t length of ridge at base .....
Ditto at grinding surface .............
Inner breadth of ridge at base ......
Outer breadth of ric.lge at base .......
Inner breadth at grinding surface ................
Maximum height at inner side ....... . ' . .' ' .. . ...
Ditto at outer side.

Upper right M 1 Small sized, fourridged, well worn ~mel quadrate ingeneral outlines of crown view. Distinct
accessory conulet present between firstand second ridges. All ridges expose
dentine islets. bend forward. parallel to
one another and running oblique t.olingual margin. Enamel wall very smooth except basal cingula on lingual side,287

enamel wall bending gently backward.
posterior runn-ing ·in vertical direction :both buccal and lingual ends of ridge
obtusely pointed. Fifth ridge runningstraight, consists of unworn four mammillae: innermost one the largest; longitudinal cleft runs between outermost
mammilla and its neighbouring one;surface of unworn enamel wall veryrugose. Hind talon, situated just behindlongitudinal cleft through fifth ridge.
consists of small sized and feeble manmillae.
Enamel rugose, black, grey or greenish
brown in colour on sarface; enamelwall thick, consisting of two layers,outer layer nearly equal to inner inthickness, measuring 6 mm in thickness
at posterior outer wall of second ridge.
Ridge frequency in 100 mm :{.5-4 bothat base and on grinding surface. Basalcingula rather thick, more developed on
lingual than on buccal side, and bearing
many laminae on both sides: cingulum
on lingual side of third ridge, the bestdeveloped of all. bears many small tubercles. Dimensions of ridges as follows
in mm :

69.0±

2
70.7
70.6
29.2
24.5
30.8
24.2
21. 5

3
70.4
65.6
33.5
31.2
20.0
31.3
312

4
54.7
51.8

31.0
29.8
16.0
31.3
37.6

5
43.8
39.2±
29.0
15.4
7.0
34·. 734.0

indicating water worning of this tooth.
Ridge formula lh-4- 1/::(?); about 79
mm in median longitudinal length and46.7 mm broad at fourth ridge where
tooth at its broadest. In upper view,
anterior-, buccal and posterior margins
running almost straight, while lingual
margin undulated. Median longitudinalcleft seems to be running with a little

288

Tokio SlllKAl\IA and Yoshihiro K!Ril

outward tum.
First ridge divided by longitudinalcleft into two dentine islets, of \vhich
outer being larger than inner: tl:e former subtriangular in outline with po·inted inner corner ; the latter irregularly
quadrate with opened anterio.outer corner; the ridge higher lingually than
buccally. Anterior accessory conulet
just before inner islet much worn andits dentine islet closely united with thatof first ridge. Accessory conulet lies
just posterior to constriction of dentine
islets of first ridge, moderately wornwith dentine disc of subquadrate dentine
islet; fore-&-aft enamel wall expanded
mesially; lingual margin more straightthan buccal. Third ridge also higher
buccally than lingually, broader linguallythan buccally in fore-&-aft direction :posterior enamel wall rather straight
while anterior a little crenulated ;dentine islet elongate quadrate. Fourthridge with three dentine islets ofwlrich inner one the largest andsuboval : longitudinal cleft runningouter side of it: the ridge higher buccally than l'ingually to grinding surface.
Enamel wall thick, consisting of twolayers : outer layer thicker than inner,the former white to grey coloured
while the latter brown to black: distal
margin of inner layer finely crenulated.
Enamel surface very smooth, brownish
black to greenish grey in colouration.
Basal cingula relatively weaker thanthe one mentioned above in M 3. Dimensions of ridges are as follows in mm :................
Greatest length of ridge at base ..
Ditto at grinding surface ................
Inner breadth of ridge at base ...... .............
Outer breadth of ridge at base ...........
Inner breadth of ridge at grinding surface
Maximum height at inner side ..............
Ditto at outer side ...............................

eText-fig. I. Transverse section of upper
incisive tusk. A; proximal side. B: distalside. e; enamel layer.

A fragment of upper incisive tusk
black to brownish black in colouration,
composed of dentine, with a gently
curved surface and two flat surfaces,
the last of which covered by thin enamel

1
35.0
38.0
19.0
21.0
15.0
17.5
14.5

2
40.6
41.0
19.0
20.5
17.0
14.5
17.0

3

4

45.0
42.3
18.8
19.0
18.0
14.6
17.6

43.0
41.4
18.5
15. 0±
17.8
18.9
20.2

layers, just as in that of Stcgodon cautlcyi progrcssus OsBORN, in which enamel
bands are present at both lateral sides.
Dentine tusk composed of seven concentric layers, outermost one of whichconcordant with curved surface anddiscordant with flat surfaces. The specimen about 67 mm long along curved
surface, 41 mm wide at proximal sideand 28 mm wide at distal, both in lateral
directions.
Rclatiouslzip :-By six ridges of upper
M 3, Stcgolophodon lydekkeri Os1mR:-:, S.
sublatidcns ScHLESINGER and S. stegodontoidcs
Pu.cRIMare distinct fromthis species. S. natlzotcnsis OsBoR" isdistinguished from this species by fourridges of upper M 3. In the presenceof five ridges of upper M :l, S. cautlcyi

Plate 41

T. SHIKAMA & Y. KIRn : Miocene Stegalophodon

1

6

4

lKEUT I, photo

A 1\Iiocene Stegolophodon from Yatuo Group in Toyama Prefecture

LYDEKKER, S. caulley£ p?·ogrcssus OsBoRN,
S. latidcns CLIFT and S. pscudolatideus
Y ABE may come near this species. In
general aspect, cautlcyi much resembles
this species, but its upper M 3 is muchlarger; it has more mammillae than
this species. Cautleyi p1·ogrcssus is allied in the laterally compressed superiortusk with enamel band and in ridge
numbers of upper M 1. but it has muchlarger teeth than this species. Latidcus
may be nearest to this species in size,
ridge numbers and in general aspect ofupper teeth etc., but may be distinguished from this species by the absenceof distinct basal cingulum on lingual sideof upper molars. Median longitudinaldeft is rather eminent in latidcns andpscudolatidcns, while it is not so welldeveloped in this species. Pseudolatidetts
is allied to this species in the tuberculated lingual- and laminated buccal basal
cingula, also in general aspect and ridge
numbers of upper M 3, but it is clearly
distinct by its smaller teeth. So that
this species occupies an intermediatetaxonomic position between latideus
and pscuclolatidcns. The present writers
regard it as a new species. The fragment of molar from Isikawa Prefecture
described by the senior author under
the name of Penta!oplwdmz (?) sp. may
be included in this new species. Latidcns
is known in the lowest horizon of the289

Irrawaddy series in Burma and in the
Dhok Pathan zone of Middle Siwalik
series in India. From the view point ofproboscidean evolution, it may be significant that in the same horizon of Middle Miocene, both archetypal species ofpseudolatidens and its closely allied but
more advanced species of tsudai are
included altogether.
Finally the writers wish to extend
their sincere thanks to Messrs K. TsvoA,
K. HAS HIT A and I. MuRAKAMI for theirkind help accorded to them in executing
this research.
References(1935), Fossil Probo"cidea from
China: Pal. Sin .. scr. c, vul. 9. fas. 3.
MAKIYAMA, J. (1~38), Japonic Proboscidea:
Mem. Col/. Sci. Kyoto Imp. UniL•., ser. b.
vol. 14, no. 1,
l1..1ATSU:'.IOTO. H. (1926), On Two New Mastodonts and an Archetypal Stcgodon ofJapan: Sci. Rep. Tohoktt Imp. Univ., Ser.
2. vol. 10. no. 1.
NAI\ASEKo. K. (1954), Correlation of the strati·
graphy of the Upper Neogene Formationin the Southern Toyama Prefecture: Osaka
Daigaku Nanko Rika JJD!wlm. no. 3.
OSBORN, H. F. (1936), Proboscidea. vol. 1.
SniKAMA, T. (1936), The First Discovery of
PcntalojJhodon from Japan: Proc. Imp.
Acad. Tokyo, vol. 12, 110. 9.
TSUDA. K. (1953). Geology of Yat5uO Area inToyama Prefecture: four. Fac. Sci. Niigata
Unit•., ser. 2. vol. 1. no. 2.
HoPWOOD, T.

Explanation of Plate 41
StcgolojJhodon tsudai n. sp.
Figs. 1 -3. llpper right M 1. 1. upper view: 2, lin~ual view; 3, buccal view. All nat. size
Figs. 4. 5. Upper left l\13. 4, upper view; 5, li:Jgual view. All 0.7 x nat. size.
Fig. 6.
A fragment of upper incisive tt,sk; dorso-ventral view, nat. size.

SYSTEMATIC INDEX(Note : Every reference is to the number of article)

PALAEOZOOLOGY
Protozoa
FUJii\IOTO, H. and leo. II.: llidae/la, a New Genus of the Pennsylvanian Fusulinids fromthe Fukuji District, Eastern Part of the llida Mountainlancl, Central Japan ............... 266- - - : A New Specie,; of Parajusulilla frorn the Kitakami Massif, Japan ........................ 283
lGo, H.: Notes on the Oso:ludani Conglomerate and Some Lower Permian Fusulinids contained in its Limestone l'ebblt!s. Part !.........................
.. .................................. 285
KANMERA. K. : Toriyamaia. A New Permian Fusulinid Genus from the Kuma Massif, Kyu·
shu. japan . .................. ................
..............................
.. ...................... 299
KoB.~YASHl, l\L: On S:.~me New Species of Rauserella from Mt. lbuki, Central Japan ......... 294
MATSUNAGA. T.: Spirosigmoilimlla, a New Foraminiferal Genus from the Mio:ene ofJapan.........................................
... . ... ....
.............
.............
267
SAKAGAMI. S.: Fusulinids from the Limestone Conglomerate in the Yagooki Valley, Tama·nouchi. Hinode-mura. Nishitama·gun, Tokyo-to, japan ............................................... 300
YAMA!i!WA, N.: Neoschwa:~erininae from the Shima Peninsula, Japan .............................. 296

Molluscoidea
HA YASAI<A. I. and MINATII, M.: Some Brachiopods from the Lower Kanokura Series of
the Kitakami Mountains, Japan.........................
. ............................................... 281- - - a n d HATAI. K.: A New Spede5 of Lingula from Hokkaido, japan.....
292
KoToll. ]. : On the 1\lulation of Terebratalia corea11ica (ADAMS and REEVE) from a Conchometrical Point of the View.................................................
.. ........ 289
MINATo, M.: Isogramma paotechowensis (GRABAU et CHAo) from the Permian of japan ... 263
and NAKAMURA, K.: On Four Brachiopod Species of the Subfamily Orthotetinae
from the Kanokura Series of the Kitakami Mountains. Japan .............
... 282

Mollusca
AMANO. M.: Occurrence of a New Species of Pleuronectiles in the Triassic of Japan ......... 262
AoKI, S.: On the Variation of Lima (Acesta) goliath and its Allied Species, with the Descrip·tion of a New Species...............................
.. ................................................ 287
IcHIKAWA, K. and YABE. Y.: Eumorphotis tnttltijormis slziouosawensis. subsp. nov. from theShionosawa Limestone at Shiono,;awa, North of the Sanchu Graben. Kwanto 1\Iountain·
land, Japan...............................................
.. .................................................. 259
KAMADA, Y.: Non-marine Mollusca from the Paleogene Uchigo Group of the joban Coalfield. Northeast Honshu, Japan ........... ....... ...................................................... ... 261
KAr-;No, S.: On some Miocene Species of Dosinia from japan......................................
272--: Tertiary Mollusca from Taishu Mine. Tsushima. Nagasaki Prefecture, Japan
26l: On Some New Glycymcrid Molluscs from Jap:m ............................................... 301
KDBAYASIII, T. and 1\IASATANI, )(.: On the Oc-:urrence nf Aturia in Provinces of Etchu
and Iwami and their Bearing on the Palaeoflumenology in the Miocene of japan ...... 258

290

Sy.;tematic Index

291

KoBAYASHI, T. : An Interesting New Form of the Aturidae from the Palaeogene of 1\orthern
Kyushu297
MASUDA, K.: 1\·Iio::ene Mollusca from Nolo Peninsula, japan, Part 1. (I) ........................... 278- - - and AKUTSU, J.: A New Fossil Chlamys from the Environs of Utsunomiya City,
Japan.
....................
.........................
. ................... 279--: l\Iiocene Mollusca from Noto Peninsula. japan, Part 1. (IT)...................
284- - - : On the l\liocene Pectinicl.ae from th·.~ Environs of Send::ti: Part 7. On Pecte11
kamharai YOKOYAMA . .. .
.. .................................................... 286- : On the Miocene Pectinidae from the Environs of Sendai : P:ut 8. On Pecten( Pati11opeclet1) kimurai Matumorie11sis N;, K,\ MUR ;, .. .... .. .. .. .. . .. .. .. ..
293
On the Miocene Pectinidae from the Environs of Sencl.ai : Part 9, On Pecten(Chlamys) miyatolloensis NoMUI{A and HATAI .
.... .........
298
MATSUMOTO. T : Evolution of Peroniceratidae ............................
265- - - . r'ebisites. A New Lower jurassic Ammonite from jap:m.
.. ............. 290
NAI\AMURA, K. and SHIMIZU. D.: Discovery of Glyptophiceras from Hyogo Prefecture.
japan................. .
260
SAITO. R. and MATSUMOTO. T.: A New Species of Damesites from the Cenomanian of288
Hokkaido. japan .....
SATO, T.: Les Ammonites Recucillies dans le Groupe de Kuruma, 1\ord du Japon central ... 277
SIJIBATA, M.: A Fossil Fauna from the Northern Part of the Tan~awa Massif .................. 295
SHUTO. T. : Amussiopecfell from the Miyazaki Group, 'Miyazaki Prefecture, Japan. (Palaeontological Study of the Tertiary Miyazaki Groap) .. ...... ... ....
.. .............. 276
UoZUMI. S.: On some Molluscan FossiL; from the Palaeogene Wakkanabe Formation in
Hokkaido ... .. . . .. .. . ... ... .. . . .. . .. .. . .. . ...
... . .. .. . ... .. . ..
271

Arthropoda
KoB!\Y,\STII, T. and IcmKAWA, T.: Discovery of Proceratopyge in the Clwangia Zone in
Manchuria. with a Note on the Ceratopygidae. Miscellaneous Notes on the Cambro·
Ordovician G~logy and Palaeontology. No. XXV.
. ...................... 270- - - : Notes on Cambrian Fossils from Yentzuyai. Tawenkou. in Shantung ................. 27-1_ _ _ : Miscellaneous Notes on the Cambro-Ordovician Geology and Palaeontology. XXVI.
Supplementary Notes on the Cambrian Trilobites from Southeastern Asia . .. .. .. ... .. .. .. 303

Echinodermata
MoRISHITA, A.:

Cretaceous Echinoid. Niponastu from the Island of Awazi. Japan ............ 275

Vertebrata
HAT AI, K.: Some Pliocene Otholiths from Chiba Prefecture. Japan ................................... 291
SHIKAMA. T. and KIRII. Y.: A Miocene Stegolophodoll from Yatuo Group in Toyama
Prefecture.
....... ... .. ....
...... .... .....
.. ........... 304

PALAEOBOTANYHUZJOKA, K.: Notes on Some Tertiary Plants from Korea (Ty6sen). V ........................... .. 269
273
OGURA. Y.: A Fossil Palm Trunk from Kanazawa ....
. .................... 268
0!-;UNO, H.: Electron-Micros:opic Fine Structure of Fossil Diatoms. III .
_ _ _ . Electron-Micr03COpic Fine Structure of Fossil Diato:ns. IV........................... 280
OSHITE. K: On Fossil Diatom from the Oil-shale of Yoshioka Formation in the South·
western Part of Hokkaido. japan . .. . ..
. ....... ............ ... ....
302

INDEX OF FOSSILS
Notes: Every reference is to the number of article; words in italics are names ofgenera and species; words in !wavy type. names of new families. genera and species.

Clementia joponica ................................ 278
C/aibomites (Sa:r;o/ucitza) quinQumzgulus .. .271
Crnssatellites (Eucrassatella) yabei yessoetl..~is ... 211
Cocconcis placcntu/a var. liueata .......... ....... 302
Coscitzodiscus elegmzs.
.. ............ 268
Corbiwla tokudai..................
.. .... 261
Cyclotella striata .
. ..........302
Cymbella cistula.......... 302- - mexicmw................ 280

A
Aclmanthes lanceolata .. .. .. .
. ....... 302
Actcocina lwmadai ....
.. .................... 284
Actiuoptychus zmdulatus .......................... 268
Aesculus .. .... .
................................ 269- - majus ................ .
. .................... 269
Cfr. - - miocltinensis.......................... 269
A maltIleus sp. .... . ... ... ... .... .. ................. 277
Amphora ova/is ....
. ....................... 302
Amphoton deois .. .
. ......................... 274- - (Sunia) tel/us........................
. ..... 274
Amussiopectell h)myaensis ..
. ...... 276- - praesignis.
. ............. ..
..276
Amzamitia spiuifera.............................. 303
Auodonta subjapmze11sis yokoyamai .
. ... 261
Asaphiscus aff. gregarius.......... 303" Aturia" matsusllitai........ 297- - miiiOC11Sis ....
..258
- - sp............... ..
................... 258.............................. 302- - /J01'Vfl

D
Damesella brevicaudata var.
. .................. 303- - paronai... .....................
.. .. 274
Damesellidae .............. ...............
.. .... 27<~
Damesitcs laticarirzatus ........................... 288
Derbya mag11ijica .......... ..
. .................. 281
Aff. Deroceras sp. .. ........... ..
277
Dosi11ia cf. clzikuzenensis .............. ..
. ... 264
- - OliQtO.. .......................... 272..

- - (Kmzehamia) kamharai ...
. .272- - (--) - - ouchieusis.
.. ........... 272
Dreprmura ketteleri var. .. ........................ 303
Dorypygella sp.
.. .303c
Callisto chine11sis takayii ......................... 278
Ca!oueis hitoyosiensis .......................... 268
Canavaria sp. ex gr. geyeriatta ................. 277
Cancrittella... ... ... .. .... .. . ... ..
.281- - cancrinijormis spinosa....... 281- - vi//iersi kozlowskicma .... .
..... 281
Ca11cel!it1a matsusltitai ............ ..
. ...... 296
Ccratopyge ....
.. .... 270
Ceratopygidae .............................. ..
.270
Ceratopyginae .......................... .
. .270.269
Cercidiphyllum crenaium ..
.284
Ccrithidea tokzmariensis
Chlamys lzataii ....
.279
- - kmzeharai....
.. .... 286. 295- - kannogawar·ensis...... 295- - miyotokoeusis........................... 298- - (Coralichlamys ?) cf. rutte11i....... 264
Chicoreus asanoi ..............
.. .......... 284- - notoensis ...................................... 284
Chonetes (Piicochonetes) depla11ata ........... 281

E
Engellzardtia koreanica. .. 269
Eutoracllis ........... .
" ...... 274
EMaukia (?) walcotti.................. 303
Epitllemia sorex.. 302- - zebra ........
...302
EumorpllotiR ..
. ........... 259- - multiformis slziolzosoll'<'nsis..... 259

F
Fragilaria construens ...

. .................... 302

G
Geyerella ? sp ..
Glycymeris compressa.
292...... 282. 301

Index of Fossils. .. , .. 301, ..... 301- - nsozau·n1sis .............. ..
...... 301
Glyptophyceras japonicum... 260
Gomphonema acuminatum var. corona/a ..... .268

- - jlabellata .
- - idensis...................... .

293- - - - var. inflata .
- - - - var. gigantca
Xe/umbium sp.
.. ......... ..
]\leosclzwagerina fu)imotoi- - salwguchii .......
NifJotlasler hokkaide11Sis ...

..280............. 280. ..... 269...... 296. ... 296
. ........ 275

H

0

Jlaliotis sp. .. .. . ..
.. . .. ... .. .. .. .. .
.. .295
Ha1ziw.1 conic.1 ..
.. .. .. .. .. .. .. .. .. .. .
. ... 303
Hayosakai11a ? kawacloi .. .... ... .. ..
.. ...... 285- - l10takiensis .
.. ................... 285
Hid ad/a ... ...... ...
...266- - komeii..
. . .. . .. . .. .. ... ..
266
llystaolenus .
. .. 270

Ortlzoteles rugosa................. 282
Orthoteliwl kayseri..............
. .. 282
Otolitlws (Lim!lnda) otomoi..
..291( Owslotzia ?) tsukizakie11sis ........... 291(Scombrops) kataolwi .................... 291( Seb.?s/odcs 1 kokumotoensis ........... 291

Ip/sogmmma paofechowensis ...................... 263

Palmoxylotz kagaense ... . .................... 273
Pambevahifes................. 265
Pamfttsu/illa mafsu/Jaishi ..
............... 283
Paralexmziles ............. .
. .. 265
Pali1zopectcn kimurai.......... 264- - matumoricnsis.
.................. 293
Peroniceratidae...............
. ......... 265
Phaxtts aff. izumoensis. ................. 26t
Pimmlaria esox fo. major .......
.. .......... :·\02

JJuglandaceae ........

. ........................ 269

K
Koldinioidia sp. . ................. ..

... 303

L.... 268. ................. 271......... 269. ...... 303....... 262· - l1irabarensis........ 262
Polinice.~ (Ettspira) otukt1i...
.. ... 284
Proceratopyge ...... ... ... .
.. ............. 270- - (Proceratopyge) liaotrmgensis ......... 270
Prosattl1ir1 angttlata.. ...
.. ........ 303
Protexanites .. .. . .. .. .. .. .. .. ...................... 265
Psettdoslaffella ? tama11otlcllicnsis....
.. .300
Psilaspis ( Entoraclzis) slwntungensis ... 274
Pterocarya asymmetrosa
269
Pyramidella hataii.. .. . .. .. .. . ..
.28-l

- - hi{JO<!IISiS

Lima (.4cesta) goliath- - (--) omorii- - (Lima) cfr. komzoi
J.ingula akabiraensis
Linoproductus corn ...
Liriode11dron meiscnensr....... 287..... 287...... 295..... 292...281. 269

kfarfinia semijJlmJa .. .
- - - - var. lata .. .
Jlfelosira gramtlata- - - - f. curvata
1lfyona j/abe/liformis. ...... 281...... 281.... 302... 302... 274

Pilar cf. matsmnol oi .
Cf. Platycarya miocenica
Pleihopd!is saurini ... ..
Pleurollcclites ............ .

R

N
Na.~saritts

110toensis., ....

Navicula mzglica- - hasta ..
ltmceolata- - macula/a- - - - var. ar:ufa ..

. ... 284... 302280.... 302.... 280... 280

Rnusrrcl/a /t~iimotoi ..

........ 294- - spp ....................... ..

............. 29-1

Rhoicosplzeni!l curv.1ta............ 302

s
Schwagerina jur01zi var. ftullmwuchic11sis .. .300

Index: of Fossils

291. .... 303
Shirakie/la sp.
..... 267
Spirosigmoilinella .........
... 267- - conzpressa .............. ..
. ........ 271
Spisula sorachiemis .......... .
.... 268.<:tauro11eis phoe11icetJ/erotz ..
Stegolophodotz tsudai
Stepha11ocare (?) bergem11i ................... .. .271................. 280
Stephm10discus niagame ... .
......... 281
Stratifera ? sp ................ .
Stt·cptorh_vttclws pelm·go11alus . . . . ............. 282....... 280
Surirc/la elegatzs .
... :l02
Sy11edra gou/ardi ....
................ 302- - ttbla ...

T
Tei11istiou- - magna .............. ..
Td11ostoma yabei .. .
Tel/ina hamadai .... .............. ..

............................. 278................... 264...................... 289. ........................ 265--- notoensis- - sp ......

Terebratalia c01·emzica
Tcxrmites ............... .
Toriyamaia .. ..
- - laxiseptata. .. 299............ 299

v
Venericardia (Cyclocardia) otatsumci ......... 271- - (Venericor) subnipponica .................. 271- - sp..
................
. .................... 295
Vicarycl/a notoensis.................... 284

y....... 274... 274... 278... 278

Yabcina ct. katoi .............................. 296. ............ 290
Yebisites ...
.. ...... 290- - orwcJerai ........ ..

a -lt"ii-±~~~~*·~c.t
Transactions and Proceedingsof thePalaeontological Society of Japan
New SeriesNo. 17-No. 24
1955-1956

Palaeontological Society of Japan

(The heading in Japanese commemorates the handwriting of Prof.
M. YoKOYAMA, father of Japanese Palaeontology, who was Professor ofStratigraphy and Palaeontology at the Geological Institute, Imperial
University of Tokyo.)

CONTENTS
Number 17 (Published April 10, 1955)
Transactions
ArticlePage

258. Teiichi KoRAYASlll and Kiyoshi MASATANJ: On the Occurrencesof Aturia in Provinces of Etchu and Jwami and their Bearing
on the Palaeoftumenology in the Miocene of Japan........... ... ... ... 1-4
259. Koichiro IcmKAWA qnd Yukio YARE: Eumorplwtis multiformis
slzzonosawetzsis, subsp. nov. from the Shionosawa Limestone atShionosawa, North of the Sanchu Graben, Kwanto Mountainland,
Japan .. . ... ... ... . .. ... ... ... ... .. . . .. ... ... ... ... .. . ... ... ... ... .. . .. . ... . .. ... ... ... .. . .. . 5 -12260. Keiji NAK,\ZAWA and Daikichiro SmMI:W: Discovery of Glypto·
plziceras from Hyogo Prefecture. Japan ....................................... 13-18
261. Yasuhiko KAMADA: Non-marine Mollusca from the Paleogene
Uchigo Group of the Joban Coal-field, Northeast Honshu, Japan ... 19-22·262. Masahisa AMANO: Occurrence of a New Species of Plezeronectites
23-28
in the Triassic of Japan ... .. ... .. ... ... ... ... ... ... ... ... ... ... ... .

Plate

1

2
3

4
5

Number 18 (Published June 20, 1955)
Transactions
263. Masao MINATo: lsogramma paotechou.:emis (GR,\BAU et CHAO)
from the Permian of Japan ...................................................... 29-30
264. Saburo KANNo: Tertiary Mollusca from Taishu Mine. Tsushima.
Nagasaki Prefecture. Japan ...................................................... 31- 36
265. Tatsuro MATSiJMoTo: Evolution of Peroniceratidae ................... 37- 44
266. Haruyoshi FtlJIMOTO and Hisayoshi ko: f!idaella, a New Genusof the Pennsylvanian Fusulinids from the Fukuji District, EasternPart of the Hida Mountainland, Central Japan ........................... 45-48
267. Takashi MATSUNAGA: Spirosigmoilitzella, a New Foraminiferal
Genus from the Miocene of Japan ............................................. 49-50
Publications received .. . ... .. . ... .. . ... ... 51
Proceedings ... .. . .. . ... ... ... .. . ... ... ... ... ... 51

6

7

Number 19 <Published September 20, 1955)
Transactions·268. Haruo 0Ku.so: Electron-Microscopic Fine Structure of Fossil
Diatoms. III ... ... .. . ... ... ... ... ... ... ... ... . .. .. . ... .. . ... ... ... ... ... ... .. . ... ... ... ... 53- 58·269. Kazuo HuzwK.-\: Notes on Some Tertiary Plants from Korea(Tyosen). V ... ... ... ... .. . ... .. . ... ... ... ... ... ... ... ... ... ... ... .. . ... ... ... .. . ... ... 59-64

8- 9
10

ii

270. Teiicbi KonAYASIIl and Takeo kHIK/,WA: Discovery of Proceratopyge in the Cluumgia Zone in Manchuria, with a Note on the
Ceratopygidae. Miscellaneous Notes on the Cambro-Ordovician
Geology and Palaeontology, No. XXV ... ... . .. ... .. . ... .. . ... ... ... . .. .. . ... 65 -72
271. Satoru Uozul\H: On some Molluscan Fossils from the Palaeogene
Wakkanabe Formation in Hokkaido .......................................... 73- 80
272. Saburo KA:--~!'o: On some Miocene Spec·ics of Dosinia fromJapan ... .
. ... ... ... ... ... . . ... .. . .. . . . .. . ... ... .. . .. . .. .
81-84
273. Yudzuru OGlmA: A Fossil Palm Trtmk from Kanazawa ............ 85- 87
Publications received
88

11
12·
13

Number 20 (Published December 30, 1955)
Transactions
274. Teiichi KoBAYASHI: Notes 011 Cambrian FoEsils from Yentzuyai,.. . ... ... ... . 89-98
14
Tawenkou, in Shantung ... ... .. . ... .. ... ... ... ... ... ... ... ... .
275. Akira MoRISHITA: Cretaceous Echinoid, Niponaster from theIsla1:d of Awazi, Japan.. ... ... ... ... ... ... ... ... ... ...
.................. 99-100
15276. Tsugio SHl:To: Amussiopecten from the Miyazaki Group, Miyazaki Prefecture. Japan. (Palaeontological Study of the Tertiary
Miyazaki Group).. ... ... ... ... ... ... ... ...
............ 101-110 16-17
277. Tadashi SA-ro: Les Ammonites Recueillies dans le Groupe deKuruma, Nord du Japon central ... ... ... ... ... ... ... ... ... ... ... ... ...
... 111-118
18278. Koichi.r6 l'VL-\SUDA: Miocene i'vlollusca from Noto Peninsula, Japan.
Part 1. (I)..... ... ....... ... ... .
.. ... ... .. ....
..119-127
19
Proceedings. .. . .. . .. . ...
. ............ 128
Number 21 (Published April 15, 1956)
Transactions
279. Ko'ichiro MAsim;, and Jun AKFTsu: A New Fo.:sil Cltlamys fromthe Environs cf Utsunomiya City, Japan .................................... 129-132
21280. Haruo 0KuNo : Electron-Microscopic Fiue Structure of Fossil
Diatoms. IV .
. .................................................................... 133-139 21-22
281. Ichiro H.HASAKA and Masao MIN;, To: Some Brachiopods fromthe Lmver Kanokura Series of the Kitakami Mountains, Japan ... 141-147
23
282. Masao J\lh".:.To and Koji NAKAl\n;RA: On Four Brachiopod Speciesof the Subfamily Orthotetinae from the Kanokura Series of theKitakami Mountains, Japan................................................... 149-155
24
283. Haruyoslri Ft:JIMOTo: A New Species of Parafusulina from theK'italmmi Massif, Japan ........................................................... 157-160
25284. Koichirc) M.:.suvA: Miocene Mollusca from Noto Peninsula,
Japan. Part 1, (II) ..................................................................... 161-167
26
Publications received................ 140
Publications received............... 148
Publications received............ 156
Proceedings ... ... .
. ......... 168

iii

Number 22 (Published June 30, 1956)
Transactions·285. Hisayoshi lGo: Notes on the Osobudani Conglomerate and Some
Lower Permian Fusulinids contained in its Limestone Pebbles.
Part 1 ....................................................................................... 169-174·286. Koichiro MASUDA : On the Miocene Pectinidae from the Environs
of Sendai: Part 7; On Pectetz kancharai YoKOYAMA .................. 175-183
287. Shigeru AoKI: On the Variation of Lima (Acesta) goliath andits Allied Species, with the Description of a New Species ............ 185-190
288. Rinji SAITo and Tatsuro MATst:MoTo: A New Species of Damesites from the Cenomanian of Hokkaido, Japan ........................ 191-194
289. Jiro KoToH: On the Mutation of Terebratalia coreanica (ADAMS
and REEVE) from a Conchometrical Point of the View ............... 195-203
Publications received ........................ 184
Proceedings .................................... 204

27
28
29

I

Number 23 (published August 31, 1956)
Transactions
290. Tatsuro MATSUMOTO: Yebisites. A I\ew Lower Jurassic AmmOnite from Japan ..................................................................... 205-212
391. Kotora HAT AI : Some Pliocene Otoliths from Chiba Prefecture,
Japan ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .
............... 213-217
292. Icbiro HAYASAKA and Kotora HATAI: A New Species of Lingulafrom Hokkaido, Japan .............................................................. 219-220
293. Koichiro :tvlAsl'mA: On the Miocene Pectinidae from the Environs of Sendai; Part 8, On Pecfett (Patinopccten) kimurai
Jllatumoriensis N.-\KAMURA ...................................................... 221-224
294. l'vlanabu KosA YASIII : On Some New Species of Rauserella from.lvlt. Ibul<i, Shiga Prefecture, Central Japan ................................. 225--228
295. Matsutaro SmBATA: A Fossil Fauna from the Northern Part of
the Tanzawa Massif ................................................................ 229--234
296. Nobuo YAMACIWA: Neoschwagerininae from the Shima Peninsula, Japan ............................................................................. ~35-242
297. Teiichi KoBAYASHI: An Interesting New Form of the Aturidae............ 24:3-245
from the Palaeogene of Northern Kyushu ... .
Publications received... 218
Proceedings ... ... ... ... ...
. ...... 246

30

31
32

33
34

Number 24 (Published October 31. 1956)
Transactions
298. Koichiro MAslll>A: On the Mioc~ne Pectinidae from the Environs of Sendai ; Part 9, On Pecfe1t ( Clzlamys) miyatokoettsis
Nm.wHA and HATAI .................................................................. 247--250

35

iv

299. Kametoshi KAl'l'>IERA: Toriyamaia. A New Permian Fusulinid
Genus from the Kuma Massif, Kyushu, Japan ........................... 251-257
300. Sumio SAJ.;,\GAMI : Fusulinids from the Limestone Conglomerate
in the Yagooki Valley, Tamanouchi, Hinode-mura, Nishitamagun, Tokyo-to, Japan ................................................................ 259-265
301. Saburo KAr-;r-;o: On Some New Glyc, merid Molluscs fromJapan ........................................................................................ 267-271
302. Kei Osurn:: On Fossil Diatoms from the Oil-Shale of Yoshioka
Formation in the Southwestern Part of Hokkaido, Japan ............ 273-276
303. Teiichi KonA YASH! : Miscellaneous Notes on the Cambro-Ordo·
vician Geology and Palaeontology, XXVI. Supplementary Notes
on the Cambrian Trilobites from Southeastern Asia .................. 277-284
304. Tokio SHIKAJ\!A and Yoshihiro KIRll: A Miocene Stegoloplwdmz
from Yatuo Group in Toyama Prefecture ................................. 285-289
Publications Received ..................... 258
Proceedings .................................... 266
Systematic Index ........................... 290-291
Index of Fossils .............................. 292-294--- --·- --

--

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