a -!t~~i.~'¥~{U..*• !c.f
Transactions and Proceedingsof thePalaeontological Society of Japan
New Series

No.7

'

Palaeontological Society of Japan

August 31, 1952

CONTENTS
TRANSACTIONS217.

An InterestingI~alation

between Stomatorbina DoRREEN, 1948 andMississippina HowE, 1930 of Foraminifera ................. Takayasu Ucmo 195
218. A Miocene Crab, Tymolus kamadai n. sp.

from the Numanouchi

Formation of the Joban Coal-field ................................. Rikizo IMAIZUMI 201
219.

The Discovery of New Miocene Fauna in the Northern Part ofNishitagawa Coal-field, Yamagata Prefecture, Japan.......................................... Kcnzo 0GASAWARA and Toshimasa TANAI 205

220.

Terabratalia (?) imzaiensis (HAYASAKA) from Iwate Prefecture, Japan............... Jchiro HAYASAKA 213

221. Occurrence of Gymnocodium, a Permian Alga, in Japan ....................... .
... ... ... ... ... ... ... .·.. ... ... ... ... ... ... ... . . ... ... ... ... ... ... ... ... ... ... ... ... Kenji KoNISHI 215
PROCEEDINGS . . . . . . . .. . . . .. . .. . .. . .

. . . . . .. . . . . .. . .. . .. .. . . .. . . . ... .. . .. . .. . .. . . . . .. . .. . ... .. . 222

President:

Hisakatsu Y ABECouncillors:

Kiyoshi AsANo, Ryuji E~oo, (Business and Accountant), Seido

ENPO,

Haruyoshi FuJIMOTo,

Shoshiro

HANZAWA, lchiro

HAYASAKA,

Koichiro lci!IKA WA, Teiichi KoBA YASH 1 (Editor), Jiro MAKIYAMA, Tatsuro
MATSUMoTo, Masao MINATo,

Tsuneteru

OINOl\llKADo(Publication),

Tokio SniKAMA, Fuyuji TAr< AI (General Affairs), Hisakatsu YABE.

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. 7, pp. 195-200, Pl. 18, Aug. 31, 1952.

217. AN INTERESTING RELATION BETWEEN STOMATORBINADoRREEN, 1948, AND MISSISSIPPINA HowE, 1930, OF
FORAMINIFERATAKAYASU UCH£01'
Faculty of Engineering, University of Tokyo

Pult•iuulina concentrica It Discorbina, EPonides, Mississippi no 'f~ co flli tc f k ; .n.t:: J!:, -tOlf\l'inl:.t EPistomina '/J· MississiPPit~a, q>$rc Epistomitlfl t;::iltll·o Mlli:,.-"' "/ ~{!f.ilttO:firtm~
0/H.ttl·~~HHLm V) 1'-l$1/li:i~ a:~9l:L. <::tfiM a: Th1H- "C. EPistomina o~ o lli!r.ttfrlill Hiiglrmdina 1c
cx~ b ,fl.,1 tr:. Plllvinu!ina CO/Icentrica"'iffrmi Stomatorbina j;::iJ!cN:> G .n. 'fr:.onf:!Ht CJ1'!1~1'.1':7 Tvi$ ottat:t~.t8 J: v: 1\-k,(a o74i,i¥~1:Jtl offl.!l'. ff:fL!1Urtoio•1-fflEf 1p t;:: Stoma.
torbi1w COI:centrica Oloc~~1:ll15'bf-·J'~*5-ThJil..t:: 0 c:::.ofl!lo:!IIHf~J·;t7 ;1 91.10 ~ YY -:1 t"Jtlt71
oillilflJTilto Mississippina monsouri .!: ~Hf~J!: fr,(<: ~ 9, ~~~;::: MississiPPina llli ot.¥~H: t "? "Cit•o o Stomatorbina .!o Mississippina o rp tllW.J~*oj~ff a: ~-I! l..'C, 1t l';· r.t Stomatorbi11n J!: Mis.
sissiPPi11a o(,Q~S~ ~ .!: "J ;t, ?> ~. Stomalorbitw o/jjlm~~<O o S. /or rei .!: S. conCNllrica .!: ofllltcai:~t..:~l!:.t'~<> c:::..!: a:mtliit..<:.:a <o1"lmiWi£¥

The writer obtained a few specimensof the so-called " Prelvinttlitta cotzcentrica
PARKER & JoNES" showing the growthstages from recent beach sands at
Minato,Chikuma-mura,Kamo-gun,Shizuoka Prefecture (southern end of
the Izu Peninsula) and also at Yacne,
Ogago-mura, Hachijo Island, Tokyo
Prefecture.
Some species of genus "Epi'stomina"
TERQUEM, 1883 have been transferred to
new genus "/liiglunditta" BRoTZEN,
1948 ;and Pulvimelina
concentrica
PARKER & JoNI\S has been included in
new genus "Stomatorbina " DoRREEN,
1948. After examining the descriptionof these two genera closely the writer
however found that Pulvinulitw C01Zcetttrica should be included in either
11.-fississippitta or Stomatorbitta.
1) Read Feb. B. 1951; received
1952.

April 14,

The original description
atorbina is as follows.

of Stom-"Low trochoid spire, dorsal sutures broad
and limbate; ventral sutures sharp and de·press..."Cl; periphery usually subacute; aperture
ventral, an elongate slit at base of last cham·ber ; supplementary ap~rtures. or clear spaces.
on ventral side of each chamber, just below
periphery, elongated spirally. depressed below
surrounding surface and closed by smooth shellmaterial, usually of slightly different colour
from that of the rest of the ventral surface.
Family Rotaliidae; subfamily Siphoninidae(DoRREEN, 1948, joum. Pal. vo( 22).

The genotype is Stomatorbina torrei(CusHMAN & BERMVDEz)=Lamarcl<inatorrei CUSHMAN & BERMUDEZ, 1937.
DoRREEN included Puluimelina cottcentrica in Stomatorbina. The last men·tioned has more prominent supplementary
apertures and shows world-wide distri. bution than S. torrei: Nevertheless heselected S. torrci as the genotype by
195

196

Takayasu UCHIO

the following reason.
" In their description of S. iorrei. CUSHMANBERMUDEZ do not mention the supplemenhry apertures, which are hard to see insome poorly preserved specimens. As EPonides
CO/lcentricus (or Pulvinuli11a concentrica) this,or closeh' allied species, have been recorded
from the Tropical Pacific, the Indo-Pacific,
Australia, the Kerimb::~ Archipelago and theMedit~rranean by various authors.
I am indebted to Mrs. PLUMMER for supplying mewith Recent specimens from the Shetlands.
which possess limbate dorsal sutures. but also
EPonides-Jike apertures without supplementary
apertures and which arc not related to Pul·
vinulina concentrica as figured by BRADY in
the Challenger Report (plate CV, figures 1 a,b). Hence it is apparent that two different
genera have been called Pu/vitmlina concentrica
P. & J. Although the one figured in the ClulJenger Report seems to have been adopted as
typical by most subsequent authors, yet, obviously, confusion exists and S. iorrei is here
adopted as the genotype ............ Another genus
which must be considered here is MississiPPina.
CHAPMAN (19-tl, Trans. Roy. Soc. South Australia. vol. 65, pt. 2) recorded Mississippina
concentrica from the Philippines, from southof Cape Wiles, and from the Lower Mioceneof Port Phillip. PARR (1945, Proc. Roy. Soc.
Victoria, vol. 56. pt. 2) recorded Eponides
co11centricus from the Victorian coast and statesthat the characters of the species suggest thatit might be referred to MississiPPina. Dr.
HowE kindly sent specimens of his MississiPpina monsouri. the ventral face of which shows
great similarity to the ventral face of Stomalorbilla. However, in MississiPPina tire whorls
embrace both dorsally and ventrally and theaperture extends from the ventral side, acrossthe periphery, to the dorsal side. Dorsal
sutures are not limbate, as in Stomatorbi11a,
but are depressed and the supplementary apertures are on both dorsal and ventral surfaces.
Therefore, while I can not accept MississiPPilla
and Stomalorbi11a as being congeneric, the twoare clearly related and I suggest that MississipPilla has arisen as an offshoot from Stomatorbina(DORREEN, 1948, Journ. Pal. vol. 22).
&

From Dr. DoRREEs's generic descriptions and explanation above cited, thewriter thinks that the main difference
between Mississippina and Stomatorbina
is that the former has supplementary
apertures on both dorsal and ventral
surfaces and the latter on ventral surface
only, although there is a difference inthe position of aperture.
The writer's yo:mg specimens ofPulvinulina co1zcentri'ca P. & J. arc very
similar to the original description ana
figure of MississiPPiina monsouri HowE,
and the writer has tried whether the two
arc conspecific or not and compared the
young specimens of the former with the
topotype of the latter which was kindly
sent to him from Dr. Alfred R.
LoEBLICH, Jr. of the U.S. National
Museum, and some differences are observed, but the former more resembles
the figure of holotype than the topotype
specimen, therefore the writer sent the
specimens of the former showing growthstages from young to adult to Dr. A R.
LoEB!.ICI! asking him to examine andcompare with the holotype of Dr. HowE's
Mississippina monsoteri.
Dr. LoERLicn's detail and carefulobservations on them in his private
letter, on March 10, 1952, is read.
" The holotypi! of MississiPPina monsouri has
7 chambers in the last whorl, as does theparatype in the U. S. National Museum collections. A specimen on your slide of a sliz~
comparable to that of the type of !If. monsouri
has 6 chambers in the last whorl. The suturesof P. concentrica is much more limbate, distinct,
and raised than are those of A!. monsouri
which are depres3ed. The aperture of P. con.
ctmlrica is much more conspicuous than that in
M. mollsouri and the umbllical flap is much
more conspicuous in P. concmtrica extending
further into the umbilicus than !If. mosnouri ...
I believe them to be specifically distinct andthat one should not be called merely a " varie-An interesting relation between Stomatorbina and MississiPPinaty" of the other. The specimens you sent of
P. concmtrica are certainly similar to specimens
figured by PARKER & }ONES, ......... "For reference, original description ofMississPPitla monsouri HoWE (Jour. PaL,
vol. 4, 1930, p. 330) is as follows.

197

MAN, U. S. Nat. Mus .. Bull 100, p.
327, pl. 68. figs. 4 a-c.
1929. l!.ptmides concentrica (P. & }.), Cusn.
MAN, U. S. Nat. Mt1s., Br1ll. 104, Pt.
8, pl. 9, figs. 4, 5.
1948. Siomatorbitw concentrica (P. & J.), DoRREEN, ]ourtl.

Pal., Vol. 22, p. 295.

1951. Stomalorbina concentrica (P. & J.). PH" Test in early st:1gcs trochoid, later becoming
almost planispiral, conv~x on the dorsal side,somewhat umbilicate on the ventral side, allwhorls visible on the dorsal side and most of
the preceeding whorls visible on the ventral
side ; distinctly umbilicate. Sutures depressedon both dorsal and ventral sides; peripheryrounded. Apertures of two sorts, one kind at
the base of the last formed chamber at the
periphery, the other kind being supplementaryap~rtures elongated in the axis of coiling on
both the dorsal and ventral sides of the periphery of each chamber. Diameter 0.50 mm. Holotype from the Byram marl at Byram, Mississippi." (see Pl. 18, Figs. 2a-c).

As H. B. BRADY said, the peculiar andvery characteristic feature of "Pzelvinulina concentrica " is a broad band ofclear exogenous shell substance bordering the chamber and concealing, togreater or less extent, their lateral faces.
(see Pl. 18, Figs. la-c).
The description of tllis species is asfollows;

Mississippina concmtrica (PRKER &}ONES)

Plate 18. Figures 3 a-c, 4 a-c, 5 a-c

Discorbina vestita. SEGUENZA, Mem.
Roy .. Acad. dei Litlcei, ser. 3, vol. 6, p.
148, pl. 13, fig. 39.
1884. Pulvinulina concentrica P. & J., BRADY,
Rep. Voy. Challenger Zool. vol. 9, p.
686, pl. 105, figs. 1 a-c.
1915. Pulvinulina cmzcentrica P. & J.. CUSHMAN, U.S. Nat. Mus., Bull. 71, pt. 5,
1880.

p. 51, pl. 28, fig. 4.

1921. Pulvinulina concentrica P. & J., Cusu-

LEGER & p,\RKER, Ceo/. Soc. Amer.
.Mem., 46, Pt. II, p. 22, pl. 12, figs, 2

a, b.
195~.

EPistomina concentrica (P. & }.), Ucmo,
Japan. ]ourn. Geol. Gcogr, vol 22.

DescriPtion :-"Test biconvex, oral ;chambers compartatively few, five toseven in the last-formed coil, carinate;
sutures covered by a clear shell material
joining with the carinal border and often
covering a large portion of the test,
both above and below ; aperture near
the peripheral border on the ventral
side. Diameter up to 2 mm. (CusHMA'l,1915, U. S. Nat. Mus., Bull. 71, pt. 5, p.
51). "
At both Minato, Chikuma-mur,l,Shizuoka Prefecture and Yaene, Hachijo
Island, Tokyo Prefecture, the growthstages of this species are observed indetaiL1. In early stages (see Pl. 18, Figs.
5 a-c), this species shows the characterof MississiPPina HoWE, and it is very
similar to M. monsottri HowE, Oligocene
species of Mississippi, America, namely,
test partially involute ventrally andevolute dorsally ; the last whorl has 9chambers which are slightly inflated,havihg clear but opaque band of shellmaterials parallel to periphery on both
ventral and dorsal sides.
2. In the next stages (see Pl. 18, Figs.
4 a-c), the characteristic opaque band
expands irregularly in each chamber on
dorsal side, but simple elongate band as
in early stages on ventral side ; unbilical198

Takayasu Ucmo

flap much more conspicuous than inearly stages, extending further into
umbilicus, therefore test becomes completely involute ventrally, the last whorlhas 6-7 chambers which are more
inflated than in early stages.
3. In adult stages (see Pl. 18, Figs.
3 a-c), each opaque band on dorsal side
expands much more and occupies wholearea of each chamber, therefore eachchamber seems to be opaque and nottransparent and also seems as if there
is no characteristic feature, while simple
elongate band exists on the ventral side
as in early st"1ges: the last whorl has
about 6 chambers, and the other charac·ters as in transitional stages. The specimen of this adult stages is the typical" Pulvinulina cmzcentrica. "Considering the writer's observation,
Dr. A. R. LoEni.ICH's comparative observations and Dr. DoRREEN's description
an·\ ililtstrations, the writer reached thefollowing conclusions;(1) Pulvinulina concent1·ica PARI<ER& JoNES does not belong to Eponides,
Epistomina, lliiglrmdina but should be
included in Mississippina.
(2) P. concentrica is distinct from
MississiPPitw monsouri, the genotype ofMississiPPitza HowE, 1930.
(3) Adult form of P. co~Jcentrica andStomatorbitza torrei have almost thesame generic character except that theaperture of P. concentrica extends fromthe ventral side, across the periphery, tothe dorsal side but that of S. torrei
ventral, an elongate slit at base of lastchamber.
(4) Therefore if adult form of P.
cmzcetttrica is not included in Stomalorbitta, then the genus Stomatorbina isvalid, but if included, then the genus
Stomatorbina DoREEN, 1948 is a synonymof the genus Mississippina HowE, 1930.
The writer's
specimens
showing

growth stages of Mississippina conccntrica (PARKER & JoNES) are deposited in
the following repositories ;1. Specimens from Recent beachsands at Minato, Chikuma-mura, Kamagun, Shizuoka Prefecture (Reg. No. CF
3030), are deposited in the Geological
Institute, Faculty of SciE.'nce, Universityof Tokyo, Japan.
2. Specimens from Recent beach sands
at Yaene, Ogago·mura, Hachijo Island,Tokyo Prefecture are deposited in the
United States National Museum, Washington, U.S.A.
Distribution :-This is the very characteristic species of wide distribution but
usually not occurring in any considerable
numbers.
According to H. B. BRADY, this species
occurs at two Challenger Stations in the
North Atlantic, namely, off Bermuda, 435
fathoms, and west of the Azores, 1000
fathoms; also off Shetland. 75 to 90
fathoms ; in the Faroe Channel, 155
fathoms; and off the coast of Norway,
15 to 40 fathoms; in the Bay of Biscay,
and in the Mediterranean. The South
Atlantic has furnished specimens fromoff Tristan d'Acunha, 100 to 150 fathoms:
and the South Pacific, from off Kandavu,
210 fathoms ; off J{aine Island, 155
fathoms.
CusHMAN recorded this from Albatross
stations D4087 in 44 fathoms and D4922
in 60 fathoms, bottom temperature 79.2"
F., both stations off Japan and he also
recorded from D5151. D5172, D5179,
D5217, D5424, D5469, D5569, D5572 in thePhilippine and adjacent seas~ namely,
east coast of Luzon; Verde Island Pas·
sage ; between Ruris and Luzon ; off
Romblon ; and numerous stations in the
Sulu Sea about Jolo and Tawi. The
range of depth at the stations is from23 to 500 fathoms ( 42 to !H4 meters),
the average depth 204 fathoms <373

An interesting relation between S!oma!orbilla and Mississippillameters). Bottom temperatures are given
at but five of the numerous Stations asfollows: 50.4", 52.3\ 52. 3°, 6.1, 1°, and75. 7~ F. (10.2.,, 11.2°, 11,2° 17.~ and24.2°C). PARR recorded this from theVictorian coast, and CHAPMAN from thePhilippines, from south of Cape Wiles
and from the Lower Miocene of Port
Phillip. Under the name Discorbina
vestita, SEGUENZA tigured an unmistakable specimen of this species, obtained
from the Miocene formation of southern
Italy.
The writer wishes to express his mostsincere thanks to Dr. Remington KEL·

199

LOGG (Director), Dr. G. Arthur CooPER(Curator), Dr. Alfred R. LoEnLicH, Jr.
(Associate Curator) of the United States
National Museum ; Dr. Hurbert G.
ScHENCK, Professor of Stanford University; Dr. K. UwAToKo, Professor ofTokyo University; Dr. K. AsAr-.o, Professor of Tohoku University, Sendai,
Japan and Dr. Leo. W. STACH for theirkindness, advice and encouragement.
Especially the writer is greatly indebted
to Dr. Alfred J{. LoEBLICH, Jr. Thanks
are also due to Mr. J. KuGA for delineation of Foraminifera.

200

Takayasu Uclno

Explanation of Plate 18
Figs. 1 a-c.
Figs. 2 a-c.
FigS. 3-5.

MississiPPitra COIICelllrica (PARKER & ]oNES).
adult stages. (reproduction from H. B. BRADY, 1884, pl. CV, figs. 1 a, b.).
Mississippitra mo11souri HoWE.
(reproduction from HoWE, 1930, ]ourn. Pal. vol. 4 pl. 27 fig. 4).
MississiPPi11a cotrcentrica (PARKER & JoNES).
showing growth stages (Specimens from Miti.ato, Chikuma-mura, Kamo.gun, Shizu.
oka Prefecture).
Figs. 3 a-c. Adult stages. typical !.1. co11centrica showing the similar feature ofgenus Stomatorbirw. x 45.
Figs. <l a-c. Intermediate stages. x 54.
Figs. 5 a-c. Young stages ahowing the feature of genus Mississippiua. x 55.

Ucmo : Stomatorbina and MississiPPi11a

Ia ·Pt.ATE 18

Trans. Proc. Palaeont. Soc. Japan, N.S., No. 7, pp. 201-204, 5 text·figs., Aug. 31, 1952.

218.

A MIOCENE CRAB, TYMOLUS KAMADAI N. SP. FROM
THE NUMANOUCHI FORMATION OF THE JOBAN
COAL-FIELD11RIKIZO IMAIZUMI
1st College of Arts and Sciences, Tohoku University

fl.l.fM~:?'iJI.£1lliii{Z!AJM.lf:b-v~ .1 '7 ;e ...... -t 7: itlll$~D>jj;i.ff;W-1i!lil::iil':t:i!l...HtHJ:.IJHJUf..&ii~PII~~fl)•l•:tlrt!fii{ZI-'!M»-&~!1\Lk :b '7~ .I '7 ;e ...... .{ 7U#J.V ...... -( 1/ :b .:.tJKrdl~t>ll-o t.lc ']- <'! "';):I> t !:> »•K -v ;e ...... .{ 7 Jillt;:.i\.ft. b l1- o o jztaii)!Ji~l'i!l11fitit.E* K/jjj T l> ;): ~ fl):jtll.Rttt/i
t\llC i: -t::,&,.S: 0.q-.{k:JJ•
K. HATAI identified the foJiowing fos·sils which were attached to the same
specimen.

The fossil crab which is considered to
be a new species, was collected by Mr.

Y. KAMADA from the Miocene Numa·nouchi formation at Kosuganotsutsumi,
Takaku-mura and Misaki, Ena-machi,
both in Iwaki-gun, Fukushima Prefecture.
It seems to represent a mature specimen
belonging to the genus Tymolus.
The writer wishes to express his hearty
thanks to Mr. KAMADA who collected
and offered the fossil crab and also
to Dr. H. YABE, Professors S. HANZAWA,
and K. AsAtW and Dr. K. HATAI of theInstitute of Geology and Paleontology,
Tohoku University for their encourage·
ment.

TcllitUl veslaloidcs YoK. n. subsp.
Macoma d. tokyocnsis MAK.
Nassarius sp.
Nuculana sp.

Description :-carapace subcircular, almost as long as broad. Width of orbital
border about 1/2 of carapace. Gastric,
cardiac and branchial region weiJ delim·
ited and convex. Antero-lateral borders
characterized by having two tubercles;
last one sharp. Posterior border concavein the middle or intestinal region.
Meso- and meta-gastric region triangular in shape, cardiac region somewhat
acute in the posterior part. Proto-gastricregion U·shaped, with a pustule on theouter anterior side. Tips of rostrum
obscure, lateral frontal teeth of rostrum
projecting outwards.
External orbital
teeth thin and its projecting tip brocken.

Family DoriPPidae DAKA 1852
Subfamily Tymolitzae ALcocK 1896
Genus Tymolus STil\ll'SoK 1858
Genotype, Tymolus japnnicus STIMPSOK.
Type locality, Hakodate Bay. Japan. SAKAI, T.,
1937, Sci. Rep. Tokyo Bunrika Daigaku, Sec. B,
vol. 3, p. 68.

Tymolres kamadat" lMAIZtrMJ, n. sp.
Text-figs. 1, 2.

Dimensions :-carapace. length 10mm., width 12mm.
width of the posterior border 6.5mm.
width of the base of the rostrum 4.5mm.

Prcservatiott :-Mould of the carapace
embedded in the gray tuffaceous sand·stone.

Holotype :-IGPS coil. no. 74002.
Locality attd geological horizon :-IGPS

1) Read June 30, 1951; received Feb. 5, 1952
201

202

Rikizo lMAlZUMI

Joe. no. Fs-14 ; east cliff of Kosuganotsutsumi,
Takaku-mura,
Iwaki-gun,
Fukushima Prefecture, (Taira sheet),Lat. 37°1' 1611.2 N., Long. 140°57' 45''.2
E., Numanouchi formation, Miocene, Y.
KAMADA coli., 1948.

Text-figs. 1-•1, Tymolus kamadai n. sp.
Text-fig. l, holotype, nat. size.
Text-fig. 2, the figure of the holotype, x 6/5.
Text-fig. 3. the referred specimen, the mould of
the carapace, x 8/5.
Text-fig. 4, the cast of the carapace, the same
specimen as text-fig. 3, x 8/5.
Text-Jig. 5, Tymalus japonicus STIMPSON after
SAKAI's Fig. 4. 1937, nat. size.

Referred specimen :-IGPS coli. cat. no.
74308, text-figs. 3, 4.

inct. The right outer orbital spine canbe obscurely seen at the base of therostrum.

Geographical distri'lmtion of the living
sPecies :-the genus Tymolus contains
eight species, of which two are known
from Havana in Cuba (232-441m.), one
from Australia and the others from the
Indo-Pacific, Barbades (365m.), West
Indies (212 and 216m.). Two species havebeen reported from Japan; they are(SAKAI, 1937, p. 68, EDWARDS et BouVIER,
1902, p. 94)
Tymolus japonicus STIMI'SON, 1858, type
Joe., Hakodate Bay, Japan.

Tymolus mzctler (ORTMANN), 1892, type
Joe., Sagami Bay, Japan.
The distribution of the Japanese Recent
species of Tymolus is as follows.
Tymolus japotticzts is found in depthsof 50-350m. on muddy or sandy bottoms,
it ranges from Hokkaido to Kyushu, andhas been recorded by Y. YoKoY A fromthe following localities (YoKoYA, 1933,
pp. 105-107 ).
1.

Locality attd geological horizmz :-Misaki, Ena-machi, Iwaki-gun, Fukushima
Prefecture, (Onahama), IGPS Joe. no.
Fs-21, Lat. 36°55' 56''.8 N., Long. 140°55'
1911 .3 E., Numanouchi formation, Miocene,
Y. KAMADA coil., 1952.
Preservation :-a mould and its cast of
the carapace embedded in the YE:llowish
gray soft tuffaceous sandstone.
Dimensions :carapace, length 13mm., width 13mm.
width of the posterior border 7mm.
width of the base ofthe aostrum 5mm.
width of the gastriccardiac region 4mm.
U-shaped proto-gastric region, length 3mm.,
width 3mm.

2 or 3 pustules of the antero-lateralborder of the referred specimen are dist-

2.
3.
4.
5.
6.
7.
8.
9.
10.
11.

Between Sltiriya-zaki, Aomori Prefecture
and Todosaki, lwate Prefecture, in 86,
9lm.
Near Todo-saki. Iwate Prefecture in 130,135. 150, 152, 154, 190m.
Between Todo-saki, Iwate Prefecture andKinkazan, Miyagi Prefecture in 165m.
East of Kinkazan, :rvliyagi Prefecture in
320-314m.
South of Kinkazan, Miyagi Prefecture in
146m.
South of Shiwoya-z:tld, Fukushima Prefecture in 99m.
South of lnubo-saki. Chiha Prefecture in
123, 238m.
Coast of Boshu Chiba Prefecture in 130m.
Sagami Bay, Kanagawa Prefecture in 165m.
Near Maisaka, Shiz·Joka Prefecture in
192m.
Suruga B:ly, Shizuoka Prefecture in 110.
123, 128m.

A Miocene Crab, Tymol11s J(amadai n. sp. from the Numanouchi
12. South of Toha. Mie Prefecture in 207.
291m.
13. East of Owase. Mie Prefecture in 132m.·
14. South of Atsumi, Aichi Prefecture in 91m.
15. West of Ashizuri·zaki, Kochi Prefecture in
296m.
16. West of Tanegashima Isis. in 203m.
17. South of Koshiki Isis., Kagoshima rreft'C·
ture in 132m.
18. South of Gotu Isis., Fukuoka Prefecture in
324m.
19. West of Tsushima lsi., Fukuoka Prefecturein 115m.
20. North of Nagata, Yamaguchi, Prefecture
in 130m.
21. East of Mishima, Yamaguchi Prefecture in
93m.
22. Wakasa Bay, Fukui Prefecture in 101m.
23. North of Noto Peninsula, Ishikawa Prcfec·
ture in 132m.
24. Toyama Bay, Toyama Prefecture in 135m.
25. West of Lake Jyiisangata, Aomori Prefec·
lure in 115m.
26. Tsuruga Strait, Aomori Prefecture in 44.
108m.

Tymolus mtcifcr (ORTMANN), found in
depths of 50-300m. on muddy bottoms.
1. South of Shiriya.zaki. Aomori Prefecturein 55m.
2. Between Todo·saki, Iwate Prefecture andKinkaz1n. Miyagi Prefecture in HI. 177m.
3. North of Kinbzan, 1\lliyagi Prefecture in
106, 123m.
·
4. South of I<inkazan, Miyagi Prefecture in
146m.
5. Eas't of Shioya-saki, Fukushima Prefecturein 104. 132, 201m.
6. Between Shioya-saki and lnubo·zaki, Chiba
Prefecture in 102, 124, 141m.
7. lnubo-saki, Chiba Prefecture in 95m.
8. Sagami Bay, Kanagawa Prefecture in 135,
170, 452m.
9. Kii Strait, east of Shikoku in 128-159m.
10. NJrth of Ashizuri-saki, K&hi Prefecturein 348m.
ll. South of Koshiki Isis. in 2-13m.
12. North of Note, Ishikawa Prefecture, japan
Sea in 123m.

203

Other records are :-Sansibar Kanal,
Lat. 5°27 1.4 S., Long. 39°181.8 E. in 463m.
East African coast, Lat. 0°27 1 .4 S., Long.
42° 471.3 E. in 638m.. Andaman, in 40Q800rn (DoFI.ElN, 190-t, p. 35).
Remarlls :-The fossil species herein
described may be a juvenile spccimanof the DoriJ;pe. The subfamily DqriP·
Pinae and Tymolinae are divided asfollows.
Dorippinae
Tymolit~aeexternal maxi!- not long, incom· long. almost comlipeds
pletely cover the p!etely cover the
buccal cavern. buccal
cavern.
affrrent bran- situated either may or may notchial openings immediately of be situat~d nearshortly in front the base of theof thechellipeds. chellipcd.

Such critical parts as above listed can
not be seen in the fossil specimen, which
is similar also to the genus Etlmsa of
the Do,·ippinae.
Etlmsa and Tymolus are distinguishedfrom each.other by the following feature.
The front of Tymolus is provided withfour teeth while that of Tymolus isentire, bidentate or four-dentate.
The shape of the carapace is more
subglobose in Tymolus. Tymolus kamadai
is similar to Tymolus japonicus, but canbe distinguished by the proto-gastricregion and number of and position of
the pustules.
References
DoFLEIN, E. ( 1904); Brachyura, in Carl Cnm<,\Vissenschftliche Ergebnisse d. Dcutschen
Tiefsee Expedition auf dem Dampfcr "Valdivia" 1898-1899, pp. 34, 35, Taf. Xll. figs.
4·7, Taf. XXXVIII, figs. 6, 7.
ElJWARDS A.M. et BoUVIER, E. L. (1902);
Reports on the results of dredging underA. AGASSIZ by the U. S. coast steamer" Blake·· XXXIX. Les Dromiaccs et 0.-rystomcs. t.fem. t.fus. Comparat. Zoo/. Harvard
College, XXVII. 1902-1912, p. 94, pl. XIX,
figs. 1-7, pl. XX, figs. 1-3, (Cyclcdorippc
atJiemzaria A. M. EDWARDS).

Rikizo lMAIZUMI

204

lWAI, J. (1950), Kamenoo Formation (Tertiary)of the Joban Coal·field, Short PaPers, IGPS
Tohoku Univ. Sendai, no. 1, p. 61.
SAKAI, T. (193<~). Brachyura from the coast of
Kyushu, Japan. Sci. Rep., Tokyo Bunrika
Daigaku, Sec. B. no. 25, p. 283.
-(1936), Crabs of Japan. pp. 39, 40.
--(1937), Studies on the Crabs of Japan, II

OJ:ystomata, Sci. Rep., Tokyo Bzmrika Daigoku, Sect. B, vol. 3. pp. 68-71, pl. X, figs.
2, 3.

NIINO, H. (1950), On the Bottom Deposits on
the Banks at the Mouth of Wakas::1 Bay
and on the adjacent Continental Shelf. ]our.
Tokyo U11iv. Fisheries, vol. XXXVII, no. 1,
p. 145.
YmmYA, Y. (1933), On the Distdbution of De·
capod Crustaceans inhabiting the Continent·
a! Shelf around Japan, chiefly based upon
the Materials cellected by S. S. Soyo.Maru,
during the Years 1923-1930, ]ottr. Coli.
Agr., Tokyo U1;iv. vol. XIII, no. 1, pp.
103-107.

Trans. Proc. Palaeont. Soc. Japan, N.S., No. 7, pp. 205-212, PI. 19, fig. 1, Aug. 31..1952.

219.

THE DISCOVERY OF NEW MIOCENE FAUNA IN THE NORTHERNPART OF NISHITAGAWA COAL-FIELD, YAMAGATA
PREFECTURE, JAPANYKENZO OGASAWARA* and TOSHIMASA TANAI*** Sumitomo Coal Mining Company,*' Geological Survey of Japan.

JlJj!J~jltj[I]JIIJ~ITI~V.>•I•Wf111:11::ri!fill¥atlfr.::9X-c: iJijiJlJII~Nflf v.>~(:.j'fJitc~<::,

J:Jlif.,:f,IJT;kilJlif~

j;tf,cv.> Jl{tfi;V: ~I:H To c. e l:ti)~Jcff.ffl< L 11: ll:, 'i'WH v.>i1:f:Jtm a:¥!Ht;· ·too.:. .fl. b v.> Jl.11::4'5 ttf~:ff.l:t>}; !1 .1: < t.c v· :il', !Jil Ji:::·e ~ 11: t v.> l;t 13M 19 f!ll·e «> o o c. .fl. E.. v.> IJ•<:, Veneridae ]lV: Tellinidae r.:fijj·.to :t v.>;V:;k~a: ,!J.v>. L:tJ· t Tellinidae ITJ APolymetis, Augulu.~ ll;
fmf-Fttct:flllf;:t:t'J:IZt.~:.:. 2: l:tt#i'ln(J-e.o o o c. v.>11:::6~i1J.Wtrq:::M!I::-el! :o t v.>t.t, ffl.:{Et-c·Jc,illv
c J! 1Jj b tJ: "' ~·. i<. >:"ir.illl!!Hi~3;fi V.>i\~ll'fllftltl:!Uift:tJ• b v.>{I:::U!f'lliftlll'ttc.fi'H!'1"L -1<1 !J' 6 fj;V::Jtilfi I.LV' .o o '-- tr· '-· flb"i~Ht c. v.>illimm,Nmil'ttv.>{t.1ig;IJ4'1f.i'ilt, i\reMt'tv.> tv.> .1: v t:t fftit <• •I·~ll!:v.>~fk'tt~iJ~¥ftr· f>,•I•-'fJJ!tiJ (trLb#Jl!ID v.>~~?lH!t.k:to tv.>e~.:t.tc"·otH~lJJJlf~· 1fillJHiUll!

Hirohama, Kamigo-mura. (Fig. 1)

In the Nishitagawa district of Yamagata Prefecture along the coast of Japan
Sea, the coal-bearing Tertiary deposits
with abundant pyroclastic materials andextrusive rocks develop on the basementof grano-diorite. As already reportedby the senior writer. at the western sideof the mountain range the Tertiary deposits can be divided into two formations-the Sanze as the lower and theKamo as the upper; and the Kamigo
formation which is very tufaceous andthought to be an equivalent of the Sanze
formation is distributing at the easternside.
As it has been reported that the 1\Hocene flora had occurred in this area, here
we report the occurrences of several molluscan fossils, being collected from thetufaceous siltstone of the Oyama member of the Kamigo formation. Main
localities of them are following two,
namely the bank of Kaminoike and theroad-cutting near the Kagayama Park,
Oyama-machi. ·The similar molluscan
fossils are found in the similar rocks at

Fig. 1. Map showing the fossil localities
in the Nishitagawa Coal-field.

t+-*-= ,., ..

x plant fossils'1< molluscan fossils

This fossil fauna contains several new
species and abundantly many specimens
belonging to the family Tcllinidae, but
most of them are ill-preserved. The
shelly materials scarcely reserved on the
moulds and the hinge part usually unobserved.

1) Read Feb. 9; received March 15, 1952205

206

Kenzo 0GASAWARA and Toshimasa TANAI
Table 1. List of Molluscan Fossils
-----

A B
Chicoreus ( Rhizophorimurcx) ligmrourmms (NoMURA)
Striat'Ca (Estc/lar:ar) uetsukieusis (HATAI & NISHIYAMA)]ommisicl/a aff. lakeyamai OTUI\A
Clcmcutill papyracea GnAY
Cyclina mitsuchii OYAJ\IA (MS)Chione (LeuAomll) cfr. tayacnsis (NOMURA & llATAI)
Paphia sp.
Sa11gui11olaria (Soletellina) sp.
APolymctis (Leporimetis) 11iPPo11ica 0YAJ\IA (MS)APolymctis (LePorimctis) lakaii sp. nov.
Angulus (Moere11a) aff. donacinus (LINNE)
Angultts (Moerella) kagayamcmis sp. nov.
Angulus (Moerc/Ta) sp.
Angulus (Fabulina?) sp
Angulus ( Tellinides) timorcnsis (LAMARCK) var.
Tcllirta (Scissuli11a) cfr. dispar CoNRAD
Glauconome sp.
Cu!lel/us otukai sp. nov.
Cu1/cl/us oyamensis sp. nov.

c D E

X

X

X
X
X

X

X

X

X

X

X

X

X

X

X
X

X

X

X

X
X
X
X
X
X

X
X
X
X
X

Horizon and locality :6yama member of Kamigo formation
A: Kagayama park, 6yama-machi. Yamagata Prefecture.
B: Kaminoike,
C: Obiro, Kamigo-mura
Yatsuo group
D: Kakebata formation in Toyama Prefecture.
E : Kashio formation

The total number of distinguishedforms and their respective localities are
given in the list. (Table 1)
At present it has never been reported
on the Miocene fauna comparable with
the Oyama fauna in this area. But thefossils of the Yatsuo group in Toyama
Prefecture includes several forms identical to those of the Oyama member. The
Kakebata and Kashio formations of theY atsuo group yield abundan't molluscs,
among which those from the lower member of the Kakebata formation show
the nearest resemblance to the Oyama
fauna in the present field. Between theboth faunas 6 species are common. They
are as follo;ving:
Chicorcus( RlrizoPhorimurex)

tigano11Tmws(NoMURA)

Stri,zrca (Estcllaca1') uctsukicnsis (HATAI &NISHIYAMA)

Cycli11a mitsuchii OYAMA (f\'IS)
Clcmmrtia PaPyracca GI<AY
Apolymetis ( Leporimetis) nippmlica OYAMACMS)
A11gulus ( Trlli11ides) timorcmis LAMARCK var.

Otherwise, Clementia papyracea, Chicoreus tiganoztrames and ]oamzisiella takeyamai are common to the middle-lower

New r..liocene Fauna in the Norlhern Part of Nishitagawa Coal-field
Miocene fauna, for instance, Tsukiyoshi,
Tsuyama, Shiogama and Kadonosawa
faunas. In the present field, the Oyama
member containing these molluscs isoverlain by the Zenpo?.i member, fromwhich many plant fossils, such as ComP·
toniphyllum Nazemam~i NATH., Liqzeidambar formosana HANCE, Cyclobalmwpsis!vfandraliscae (GAUDIN), Zelkova Ungeri(En·.) and others are yielded. The geological age of the flora is considered tobe middle-lower Miocene. The Kakeb:1ta
member, whose fauna is comparable only
to the Oyama fauna for the present, also
contains Miogypsina and Operculina, or
locally Comptoniphyllrem and Liqttida-

mbar.
From the above-mentioned facts thewriters intend to consider the geologicalage of the Oyama fauna to be " lower
Miocene".
The writers wish to express their gratitude to the late Prof. Y. 0TUI<A, Dr.
F. TAI<AI, Dr. K. 0YA!viA and Dr. R.
SAITo, for their kind directions andmany suggestions in this study.
Description of the noteworthy Speicies
Family Murcidae

Clzicoreus (Rhizophorimurex) tigan·ouramts (Nol\lt:RA)
Pl. 19, fig. 1
1935. Murex tiganouranus, NoMURA: S;lito
Ho-on Kai Mus. Dull. Geol.. No. 3, p. 225.
pl. XVI, fig. 18.
1950.

Chicoreus (Rhizophorimurex) tiganour·mws, OYAMA : Rep. Geol. Surv. ]ap.
No. 132

Height ca. 30:nm., Diameter 19mm.

Remarlls: This sprcies is not so wellpreserved and the aperture and canal
are lacked, but is rather identical to
NoMURA's species from the Shiogama
bed in the vicinity of Shiogama bay.

207

Family Arcidae

Slriarca (Estellacar) uetsukie11sis(HATAI and NISIIIYAMA)
Pl. 19, fig. 2
1949.

Rarbatia (Barbatia) t10tsukie11sis, HATAI

and NISHIYAMA: ]our. Paleont. 23, p.
89. pl. 23, figs. 6. 7.

Lt·ngth lOmm .. Height 6.5mm.,
Thickness 3mm.

Remarks: A few outer moulds of thisspecies, found at Oyama-machi, do notpreserve ligamenta! area which is trans·versely striated, but the general shapeis quite identical to OYAMA's well-pre·served specimens g:1.ined from the Kake·bata formation of the Yatsuo group.
Family Unglinidae]oamzisiella aff. takeyamai 0TUKA
Pl. 19. fig. 3

f oamzisicl/a takeyamai OTUK A:
Jour. Fac. Sci., Imp. Univ. Tokyo, vol.
v. pt 2, p. 29, pl. IV, figs. 32-34, 37

Camp. 1938.

Description : Shell small, ineqilateralor nearly equilateral, ovoidal or circular
in shape, rather inflated ; beak small,more or less prominent ; postero-dorsal
margin slightly convex, posterior end
roundly truncated, antero-dorsal margin
concave, anterior end narrowly rounded,
ventral margin moderately round; surface ornamented with fine concentricstriae separated by concentric interspaces
which are irregular in breadth; ligamenta! area never marked.
LengthHeightThickness

l!l.5mm.
10.5
18.0

14.0mm.

5.5mm. (fig. 3)

16.0

6.0

9.5

Remarks : The most allied species tothis specimen is ] . takeyamai 0TUKA
having been described from the Uetsuki·

Kenzo' 0GASAWARA and Toshimasa TAN AI

208

Tsuyama group of the Shobara basin in
Chugoku, western Japan.
Family Veneridae
Clemettlia papyracaa GRAY
PI. 19, figs. 4, 5.

C/cmm/ia papyracca. SoWERBY : Thes.
Conch. vol. ll, p. 700, pl. CLI, fig. 155
1880. Clementia papyracca. K. 1\fARTI~: Die
Tertiaerschichten auf java. Th. I, S. 99,
Tab. XVIII, Fig. 6.
1940. Clementia papyracea, OYM•IA & SAKA:
Res. Inst. Nat. Resouc. vol. I. No.2. p;>.
137-144, pl. 15, fig. 15 a, b; 16
1855.

Length52mm.
28Height41mm.
22Thicknes>
2l.5mm.
12.0

II/L

0.796 (fig. 5)
0.785 (fig. 4)

Remarks: A few specimens are obtained. Their general shape and ornamenton the surface are identical to those of
C. papyracaa. The species is reported
to live in a warm or tropical water,
south of Formosa.
Cyc/iua mitsucllii OYAMA (MS)Pl. 19, figs. 6a, b. 7

Length32mm.

Height39mm.

Thickness
22mm.

H/L
1.21

Remarks: Our specimen is identicalfairly well to OYAMA's specimen. Cycli11a
si11eusis GMF.LIN is the most allied spPcies
to this, but the latter is distinctly higher
and more strongly inflated than theformer.
Chione (Leukoma) cfr. tayaensis(NoMURA & HATAl)
Comp. 1939. Venus (Chione) layaensis. NoMURA& IIATAI: jap. Jour. Geol. Geogr., vol.
]6, p. !i9.

DescrijJtiou : Shell small, triangular.
with marl<ed radiating riblets, crossingthese riblets there arc distant co.ncentric·
ally raised lamellae; anterior extremityround, posterior end sub:mgulate; anterodorsal margin slightly excavated, postero-dorsal margin more or less convex; ligamenta! area not so long but well mark·ed ; hinge and pallial line not observed.
Length7.0mm.
8.5

Height5.0mm.
6.5

H/L

0.71
0.76

Remarks: This species is closely allied to Chione tayaetzsis in the above described characters, but on account of its
ill-preservation, it can not beet perfectly
identified.
Pap/zia sp.
Pl. 19, fig. 8

Descriptions ; Shell large, ovally elong·
ated, compressed vertically; surface ornamented with very distinct concentricribs which become wider posteriorly andnarrower anteriorly: beak not prominent,
antero-dorsal margin slightly concave,anterior extremity produced, narrowed,
or rounded; antero-ventral margin alittle arcuated with a curve at an obtuse
angle a little anteriorly below the beak;posterior extremity not preserved; pallial line not observed.
Length55mm. (at least)

Height37mm.

Thickness
5mm.

Remarks: The characteristics having
been observed in this specimen, are thegeneral outline, especially concaved an·tero-dorsal margin and distinct concentricribs. As the fossil species of the genus
comparable to the present material isnever found, it seems to be probably a
new species of Papltia. But on accountof its ill-preservation we give no specificname to it.
Satzguinolaria (So/eta!liua) sp.
Pl. 19. fig. 9

Description : Shell elongated, closed,
a little longer posteriorly: surface sculptured with concentric irregular wrinkles
and striae with irregular, radial, slightly
flexures; rather convex at the umbonal

New l\Iiocene Fauna in the Northern Part of Nishitagawa Coal-field

area, umbo more or less produced, situated a little anteriorly near the midlength ; antero-dorsal margin slightly
convex, postero-dorsal margin concave,
ventral margin slightly arcuated. Hinge
teeth and inside of the valve not observed.
Length42mm.
21Height
18.0
9.S

I-1/L
0.428 (fig. 9. right valve)
0.432 t)eft valve)

Remarks: The present specimen isclosely similar to Soletellina adamsi DEsHA YES, but it is more rou'ld at theanterior end and has not marked wrinldes on the surface than the latter.
Soletellina minoensis YoKoYAMA is easHy
distinguishable from the present specimen
by its height.

209

anterior end rounded ; postero-dorsal
margin short, posterior end obtusely
truncated (or rounded); ventral margin
not well observed, but more or lessstraight with a contraction near theposterior end. Surface ornamented withnumerous fine concentric striae and wrinldes which become obscure near theposterior end. Ligament narrow but
distinctly marked, hinge not well observed.
LengthHeight Thickness H/L
ca. 40mm. ca. 34mm.
ca. 0.8SO (fig. 11)
32
28
Smm.
0.878
38
32
0.847

Family Tellinidae

Remarks: This species is comparatively common in our field and very similar to APolymetis (Leporimetis) nippotzica, but rather higher and more inflated
than the latter.

Apolymetis (LcPorimeti's) 11ipponica

Angulus (Moerella) aff. donacinus

OYAMA

(MS)

Pl. 19, figs. 10 a, b

Length4'3mm.
23
39

36
34

Height Thicknfss H/L
33mm.
8mm.
o.78n (fig. 10)
3
0.738
17
30
0.770
28
0.778
27
0.750

Remarks: The present specimens are
fairly well identified to the type-specimen
from the Yatsuo group. This species is
one of the most characteristic and common fossils in the present field.
APolymetis (~cporimetis) takaii
sp. nov.
1'1. 19, fig. 11

DescriPtion: Shell large, high, subtrigonal or subquadrate, nearly equilateral,strongly inflated in the anterior half
part; beak prominent, incurved, nearly
mesial. Ornamentation of the surface
and radial folding are quite as well as
Apolymetis 1tiPPonica.
Antero-dorsal
margin slightly convex, moderately long;(LINNE)
Pl. 19. fig. 12Comp.
1767. Tel/ina donacina, LI~NE: Syst. Nat. ed.
12, p. 1128. No. 59
18!7. Tel/ina donaci11a, SoWERBY:
Thes.
Conch. vol. 1, p. 232, pl. LVI. fig. 12;
pl. LXVI. figs. Sa, b.
1853. Tel/ina donacina, WooD: Mono. Crag
Moll. vol. II. p. 233. pl. XXH. figs. Sa, b.
1909. T. (Moerella) donacinus, CoSSMAN &PEYROT: Conch. Neog. Aqui.. p. 230,
pl. VIII. figs. 13-18.

Description : Shell small, elongate,
rather compressed, moderately convex,
subtrapezoidal, inequilateral, anterior
end round ; postero-dorsal margin alsonearly straight but short, posterior end
obtusely angulated ; ventral margin
slightly arcuated: surface ornamented
with fine concentric striae, and an obtuse
radial ridge observed from beak to
postcro-ventral edge. Ligamenta! area,
hinge teeth and pallial line not observed.
Length 17mm.,

Height 9mm.

Kenzo 0GASAWARA and Toshimasa TANAI

210

Remarks: LINNE's species, Angulus(Moerella) dotzacintts is the nearest approach to this specimen in the above
described characters, but the latter is too
ill-preserved to be perfectly determined.
This species is ranging from Miocene torecent and the living one found in Britain
and the other part of Europe.

Atzgulus (.Moere/la) kagayamemis
sp. nov
Pl. 19, fig. 13

Descnption: Shell ovally elongated,dorsal slopes rather straight, ventral
margin nearly straight but slightly convex ; anterior side shorter, obtusely angulated; beak pointed incurved ; lunularregion distinct, anteriorly situated, observed along the whole length of the antero-dorsal margin; surface ornamented
with fine concentric striae, even con·centric undulation and fine radial striae,
presenting a faint cross\vork fabric near
the ventral margin ; an obsolete radial
flexure seen from beak to posterior endof ventral margin ; pallial sinus deeply
elongate, elliptical and attains anterior
one-third of the length.
Length35mm.

Height22mm.

H/L
0.628 (fig. 13)

Remarks: The present specimen issimilar to Tellina (Moerel/a) aldrechi
DALL in the general outline, but in thelatter a flexure runs from beak topostero-ventral corner, postero-dorsal
margin concave, posterior end truncated,
and rather smaller in height. Tel/ina(Moerella) lzettdcrsoni DAI.L is more
broadly rounded in anterior and posteriorly longer than the present new species.
This species also resembles Tel/ina(Moerella) jedoettsis LiscHKF. which isfigured by Y. OnlKA from the Miocene
formation of Shobara, but differs in thatthe anterior and posterior extremities
are more round, and antero-dprsal

margin is slightly more convex.

Atzgz,lus ( Afoerella) sp.
Pl. 19, figs. 14. 21. Descrtption: Shell oval, inequilateral,
ventral margin more or less convex,
antero-dorsal margin nearly straight or
straight, posterior side shorter, its extremity subangulate below; beak pointed,
not much incurvcd; surface ornamented
with numerous fine concentric striae andin a specimen faint radial ones are found;ligament large, fold obsolete, teeth andpallial sinus not distinctly observed.
Length Hl.'ight 11/L (fig. 21. left, valve)
27mm. 19mm. 0.703 (fig. 14. ..
,IR
10
O.f.6612
8
0.555

Remarks: The most allied species tothis specimen is Telliua lata GMEI.IN, but
the latter is distinct from the former by
the more roundness of the antero-clorsal
margin and anterior end.
Angulus (Fabulina?) sp.
Pl. 19, figs. 15

Descriptiotz: Shell suborbicular, slight·
ly triangular, subequilateral, more orless ventricose; ventral margin arcuated; antero-dorsal and postero-dorsal
margins nearly straightly convex, theboth adjacent to the prominent beak, andthe former shorter and less sloping thanthe latter; anterior side round~d. posteri·or side rather angular; surface ornamented with numerous very fine closely concentric striae ; fold and flexure
absolete (only a faint sign of flexure seenat anterior area), lunule and escutcheon
sharp, lateral teeth not observed.
Length.
9.5mm.

Height
8mm.

H/L

0.8~2

Remarks: The present specimen israther characteristic to Angulus in theoutline of anterior half, which is slightly
convex in antero~dorsal margin, and ro-New 1\Iiocenc Fauna in the Northern Part of Nishitagawa Coal-fie:dunded in anterior end. But its posteriorside is different from that of subgenera.Moerel/a and Tellinides, and rather close
to Fabztlina.

Angulus (Tellinidcs) timore1tsis(LAMARK)var.

Pl. 19, figs 16a, b, 17Comp.
1847. Tclli11a timorensis, Pili LIPPI: Abbild.
Tellina. Tab. IV, fig. 2
18<~7. T. (Tellinides) timorcnsis, SoWERfiY:
Thes. Conch. vol. 1, p. 292. Pl. LXI. figs.
15.~. 172.
1920. Tellin'l timonmsis, TESCH, P.: Palaontologie von Timor, 8, s. 105 Tab. CXL.
fig. 278
1941. T. (Tellinidcs) limorcnsis, KURODA:
Catal. Moll. Taiwan, pl. XII, fig. 87
Length43mm.
39Height Thickness H/L
30mm. 12(6)mm. 0.697 (fig. 17)
28
0.718

Remarks : In the present field thisspecies is rather abundant, and almost
identical to Angulus ( Tellinides) timoreusis a living species of Indian Archipelago, Philippine and etc. in the generalshape and ornamentation of surface.
Psammobia vesPerlina CIIR:>I:-;ITz is al·
most similar in its outline, but Psammobia has a wider ligament and conspicuous gaping.

211

lete ; surface ornamented with numerous
fine concentric striae ; ligamenta! area
narrow but sharp ; two lateral teeth
long.
Length
13.5mm.
15.0

Height
Bmm.
10

H/L

0.5~)2

0.666

Remarks: The present specimens arc
closely similar to Telli11a (Scissuli11a)
dispar in their outlines, but the former
is rather shorter and more rounded.
As the right valve is not found, thesubgeneric character of the oblique striae
on shell surface is not ascertained.
Cteltellus otukai sp. nov.
Pl. 19, fig. 19

Description: Shell thin, long; surface
ornamented with fine concentric wrinkles;
posteriorly elongate, terminal marginsubtruncate (nearly square), situatednear the anterior one-fifth, a little gaping
at both ends ; teeth not observed.
Length44mm.

Height15mm.

H/L
0.340 (fig. 19, right valve)

Remarks: The present species is mostallied to Cttltellus hauleyi DuNKER, but
the !attar is longer. This species isnamed in honor of the late Prof. Y.
0TUKA of Geological Institute of Tokyo
University.

Tellina (Scissuli1ta) cfr. disPar CoNRAD
Pl. 19, fig. 18
Camp.
1857. Tellit:a disPar, SowmwY: Thes. Conch.
vol. I, pl. LIX, fig. 108

Description: Shell small, ovate, slightly
elongate, subequilateral, subventricose ;beak pointed, rather incurved, situatedat the midlength of the shell ; antcrodorsal margin short, not much sloping ;anterior extremity rounded: Posterodorsal margin nearly straight, posterioredge obtusely angulate, ventral margin
slightly convex; fold and flexure obso-

Cultellus oyamensis sp. nov.
Pl. 19, fig. 20

Descripiio1l : Shell elongate, compressed, a little gaping at each end, rather
straight; surface ornamented with fineconcentric striae and irregular wrinkles ;posterior side narrow and elongate, rounded at the end ; dorsal margin straight, ventral margin slightly contracted
near the midlength; anterior side short,attenuated at the end ; umbo very small,
not prominent ; ligament narrow but wellmarked near the umbo,

212

Kenzo 0GASAWARA and Toshimasa TANAI. Length- 45mm.

Height
12mm.

H/L
0.266

Remarks: :This species is more narrowbladed than the preceding new speCies.
References
CoSSMANN, M. & PF.YROT. A. (190)), Concho·
Iogie Neogenique de L'Aquitaine Pdecypodes l.
.
HATAI: K. & NlSillYA!viA, S. (1949), New;fertiary Mollus:a from Japan. ]our.
Pale01rf. Vol. 23, No. 1, pp. 87-94
KuRoDA, T. (1941), A C:1talogue of 1\Iolluscan
Shells from Taiwan (Formos:~). with Descriptions of New Species. t.fcm. Fac. Sci.
& Agr. Taiholw ImP. Univ .. vol. 22, No.4
MARTIN, K. (1880), Die Tertiaerschichten auf_ · Java, Th. 1
NoMURA, S. (1935), ·1\liocene. Mollusca from.
Siogama. Northeast Ronsyu, Japan. Saito
Ho-on-kui Mus. Res._ Bull. (Ceo/.). vol. 6.
No. 3, pp. 193-232.
- - & HATAI, K. (1939), On Some Fossils from
Akita Prefecture, Northeast Honsyu, Japan.
]ap. ]our Geal. Geogr. vol. 16. pp. 36-€4.
OTUKA. Y. (1938), Mollusca from the Mioceneof Tyugoku, Japan. ]our. Fac. Sci., ImP.
Univ. Tokyo, Sec. 2, vol. 5. pt. 2.
OYAMA, K. (1950), Studies ~f Fos3il Mollu;canBiocoenosis No. 1. Rep. Gcol, Sr4TV. japan,
No. 132.
OYAMA, K. & SAKA, K. {19·14), Fossilienmollusken der Tul<iyosi-Formation (1). Bull.
Sigenkagaku Ker1kyusyo vol. 1. No. 2.
PIIILIPPl, R. A. (1847), Abbildungen und Beschreibungen neuer order wenig Gekannter
Conchylien. Bd. 2.
SoWERBY, G. B. ( 18·!7), Theaurus Conchyliorum vol. i.
TANAI, T. (1931), La structure geologique deIa partie septentriomle du bassin houiller
de Nishitagawa. Prefecture de Yamagata.
]our. Geol. Soc. ]ap:m., vol. 57, 110. 668.
pp. 157-170.
- - (1952), Des fossiles vegetaux du bassin
houiller de Nishitagawa, Prefecture de
Yamagata. Japon. I. japan., four. Geol.
Geogr., vol. 22, pp. 119-135.
-.- (1~52), The fossil flora from the Nishitagawa Coal-fikld, ]:.lp111. II. (MS)TEscir, P. (1920) Palaontologie von Timor. 8.
Wo()o,' V. (1853), A Monograph of the Crag
Mollusca.

Explanation of Plate 19.
Fig. 1. Chicorcus (RhizoPhorimurex) liganoura11us (NoMURA).
2. Stn'arca (Estellacar) uetsukiensis (HAT AI & NISHIYAMA)F•Jg.
Fig. 3." ]oallnisic/la aft. takcyamai OTUKA
Figs. 4, 5. Clcmcllfia papyrac_ca GRAY
Figs. 6a, b. 7. Cyclirra cfr. milsuchii OYAMA·Fig. 8. PajJhia . sp.
·
Fig. 9. Sanguitrolaria (Soletellitra) sp.
Figs. lOa, b. APolymelis (Lcporimc!is) 11iPPo11ica OYAMA
Fig. 11. Apo'ymetis (LcPorimJ/is) takaii 0GASAWARA & TANAI
Fig. 12. Atrgulus (llfderella) aff donacinus (!.INNE)
Fig. 13. A11gulu.~ (11-!oerella) kagayametiSiS 0GASAWARA & TANAI
Figs. 14. 21. Angulus (Moerella) sp.
Fig. 15. A11gu/us (Fab.ulina?) sp.
Figs. 16, 17. A11gulus (Tellirrides) timonmsis (LAMARCK) var.
Fig. 18. Tel/ina (Scissulina) cfr. dispar Co~-H~AD·Fig. 19. Cu/tellus otuk:Ji OGASAWARA &.TANAI
Fig. 20. Cultel/us oyamensis-OGASAWARA & TANAIOC ASAWARA & TANAI : Miocene Fauna of Nishitagawa

PLATE 19

9

16 a

17

18

16 b

8

1

15
10 b

6b

2

s

13

7

]9

11

Trans. Proc. l'alaeont. Soc. Japan, N.S., No. 7, pp. 213-214, 3 text-figs., Aug. 31. 1951.

220.

TEREBRATALIA (?) INNAIENSIS (HAYASAKA) FROMIWATE PREFECTURE, JAPAN"
ICHIRO HAYASAKA
Department of Geology and Mineralogy, Hokkaido University~ f·!Mlli (f)Terebratalia ( ?) imllliellsis:

c c ;::: ~;r--; ¢ *~t1$f~.::Ht.;rflt1{ a: jj;-t" 0
li'·J.t.i·-tl!SIn the collection of the Tertiary fossils of Northeastern Japan in the Department of Geology and Mineralogy, Hokkaido University, there are two specimens of a brachiopod species in association with some molluscs from Suenomatsuyama, lwate Prefecture.
The
brachiopods belong to the species which
was described by the writer of thispaper in 1!)22 as Magellania lenticzelaris DEsHA YES var. imzaiensis nov.,
because the specimens were obtained
from the depth of about 200m. in a shaft
in the Innai Mines, Akita Prefecture.
Although· the internal features were notexamined because of the lack of suficientmaterial, the specimens were regarded
to be a Magellania on account of someexternal characters. But, at the sametime, a close affinity of the fossil to acertain species· of Terebratalia was emphasized by the writer in the discussion
on the affinities.
The most characteristic external feature of the fossil from Innai Mines is"that the two valves are in their urnbona! region ornamented with distinct
radial striae that hardly extend halfway
from the beak." The whole surface is,in reality, covered by concentric growthlines, but in the area beyond the radiallystriated visceral portion of the shell thelatter alone occupy the surface.
In 1940, HATAI, in his comprehensive
work, refers to this fossil, and calls it
Terebratalia imwiettsis (HAYASAKA).
He examined the original material of" Magellattia

lenticularis

imtaicmis"

preserved in the Institute of Geology andPaleontology, Tohoku University, but
the internal structures were not ob·

Terebratalia (?) imwiensis ( HA YASAKA)
from the Suenomalsuyama series,
Iwate Prefecture, Japan.
Ventral (1 ), dors:li (2) and lateral(3) views ( x 2/3)

1) Read June 22, 1952; received April 4, 1952
213

214

Ichiro .HAY ASAKA

served. Because of the external affinities
in certain respect:> it is regarded by him
as probably a Terebratalia. It seems,
therefore, better for me to put a ? as to
the generic denomination.
Be it ,..,-hat it may, the original material was believed to have been obtained
from the lowest Neogene formation in
the Innai Mines region. According to
HAT AI, however, Terebratalia ( ?) innaietzsis is "Upper Oligocene (?) to
Lower Miocene " in age.
Now, the occurrence in Iwate Prefecture is to be taken into consideration.
The specimens are in the collection of
MATSUI from the Suenomatsuyama series
in the northern part of Iwate Prefecture.
According to Y. 0TUI<A the Suenomatsn·
yama series is rather lower Pliocene
than in upper Miocene in age, as wasconcluded from his studies in thestratigraphy and palaeontology of theregion.
The two localities of the br:1.chiopod
species being situated so closely to eachother, and, in consequence, possibly
within the same paleogeograpical area,
the occu"rrences seem to be chronologically not very remote if not strictly

contemporaneous. Then, the brachiopod
species under discttssion may have to berecognized as a form indicative of thelower Pliocene, or the upper Miocene, i.
e., the middle Neogene, of the northernpart of Japan.
As one of the specimens at hand,though not anything like a complete one,shows the characteristic feature very
distinctly, and, as neither of the illustrations given by HAYASAKA and HATAI
repre>ent the striated pattern of thesurface ornamentation in the visceralportion, pictures are here given to supplement the rather imperfect descriptions
and discussions hitherto available.
References
IIATAI. K. (1940):

The Cenozoic BrachiopJd:tof Japan. S::i. Rep. Tohoku Imp. Univ.,
2m! ser. (Geology), vol. 20, pp. 292-3, pl.
3, figs. 4·1-45.
.HAYASAIC\, I. (1922):
Oa Some Tertiary
Brachiopods from Jap:tn. Ibid., vol. 6, no.
2. pp 156·7, pl. 8, fig. 17.
OTUI<A, Y. (1931): Tertiary Structures of theNorthwestern En:! of the Kitakami Moun·tainland, Iwate Prefecture. Japan. Bull.
Earthq. Research Inst .. Tokyo Imp. Univ.,
vo/. 12, pp. 566-638.

Trans. Proc. Palaeont. Soc. ]ap:m, N.S., No. 7, pp. 215-221. Pl. 20. 6 text-figs., Aug. 31, 1S52

221. OCCURRENCE OF GYMNOCODIUM, A PERMfAN

ALGA-, IN JAPANYKENJI KONISHI
Geol. Inst., Univ. of Tokyo
f:l .:f: J: !J =~*il:U.l'k~ Gymno.-odium v.iltiill L tc ~ ~ : '"i;IH~fW,{dl~~l'.!.!'f'f 7 2!',(i}!C.f':- J: !J.:t:•V1·M~~~L, ~QK*~V~~re~~L~V-ilit~Lko~~~=-----~----In describing a new species of Gymnocodium, I wish to demonstrate the highvalue of the genus as an index fossil.
The species was found in a piece of fusulinid-bearing limestone from Imogadaira,Talmra-village, Fukui Prefecture (Prov.
Echizen) (Lat. 35°48'38.7" N., Long.
136°20'17.7" E.), which had been presented to Prof. KosA Y Asm from an amatuer.
It was transferred to the writer for close
examination because of its special interest
that it came from an uncultivated region
geologically.2' The writer wishes to express his sincere thanks to Prof. KoBAYAsHI for the continuous encouragement and supervision of this paper inmanuscript, to Prof. Ryuji ENoo of the
Saitama University at Urawa for his
suggestion and assistance, and to .Mr.
Yoshitaka HoRI, master of Koyo Middle
School at Fukui, the collector of thespecimen.
Through this study it is found thatthe limestone contains late Early Permian fossils among which an algal species
similar to Gymnocodizem belleroPlwntis

is found in profusion. A form from the
Kitakami Mountains once referred to
Gynmocodium, was later made the genotype of Hikorocodium by E:--JD::J (195') &'51). This is, therefore, the first occurrence of the genus in Japan. According
to him ll1izzia occurs in the mountains
in the" Parafusulina" Zone where it is not<!CComp:mied by Gynmocodium. The coexistence of the two genera that werereported from several foreign localities,
may indicate the age of the Neoschwagerina· Verbec!dna Zone.
The two fusulines are typical of theTethian fauna like Polydiexodina in the
Atlantic fauna (Du:,mAR, 1942; TuoMrso.r-;, 1946, etc.). As discussed below,
Gynmocodium is an inhabitant in thewarm sea of the two provinces of thesame age distinguished by the abovementioned fusulincs and possibly survived later for some time. Gynmocodium belleroplzontis is its type species
which is known from Southern Europe(Bellerophonkalk) and Iran. The occurrence of Gymnocodium is expectable in
Afghanistan, Indochina, South China or
elsewhere3' in the Tethian province because the genus is known now in Japan.
On account of the wide distribution of
the genus in the limited age it may becomparable with Mizzia (JoHNSoN,

1) Read, Oct 20, 1951; received, March 25,
19522) A fusulinid limestone locality at Sugitani,near lmogadaira, is all wh1t has b:!en known
since OHTSlii<I and KIYONo's sheet survey(1919); last spring. HAYASAKA & MATSUo(1951) rep:>rted Neosclmugerina craticulifera(SCHWAGER) from Imogadaira.

3) JoHNSoN (1946-a) noted the occurrence of
this genus in East Indies.

215

Kenji KoNISHI

2161942).4> (Sec Text-fig. 1),I

Description of Species
Genus Gymnocodittm PIA, .191!>

8..

.!:;!

::!

,....,

~<:>

~

""

01

::<)

"'
rli + :;:

.,..,

....

'\j

..::..
<:>

Q.,

01

'0

"' ·;::"i::

...,.
0>
,...,

N

01
.c .!a
~

0

'"Cl
(::

..c:u

fJl

"' z'-'~

01.."" ~ ~;::
c.: If)~0< C> '"0 ":l.....
~ .....
z""::J~ A.. s: ""G 'G0""

~

<:>
....
<:>

:.

til

0

..:
M
><
0>
..: ;:"" :;:""tl..... ~
;:;
t'-

!::
~- ~
....

rJl
rJl

(/)
(/)

< ~0.. '\j<:> ~._,~

'0

c

0

-.;:::::1.c"'<:> 'i:...
l:....~ :1'o(j !:: ..::-<:>
GO"" .;. G.. c....

'-'.;'5 '"0·a""i5"' ·;::

<0

~

;i

~

!::

1:1

~<:>

,....;

t>(l

~

i

x

0

E-<

G c..<:>

OJ

0

If)

"" ~c
!:() :;:.c
II? urJl :.:
<U

E-<

z"'
-c
c

!:i

• -o·a

·;::
~

~ ""
:;; .cu:::~ ..::- "'0
..

z..

0 <l

X

The type species of Gynmocadimnis
Gyroporella
bellerop!wtztis
RoTHrLETZ(1874) whichwasdiscovered in Dolomitcn, South
Tirol. It was referred once to A1acroPorclla by FIA (1912), but laterhe (1919, '26, 'Zl & '37) instituted
speciesGynmocodium on thewhen he described it from theEellerophonkalk in the Linaric
Alps, because it can be distinguishedfrom M acropri1·ella and also from
G;·rc-porel!a by the bifurcation of
the thallus, pith· like ~>tructure of thecentral body and irregularly rami·
fied and cone-shaped branchts. The
type localities of the SiJ€des were
investigated geologically and G. uodosum was added to it by 0GIT.VIE·
GoRnoN (1927 & '34). Her Fusuli11ella
itoi (1934 ; I I. 3, figs. 3 & 4h: Pl.
4, fig. 5) which was found in association with this species and somebrachiopods and mollmks, looks
like a minor foraminifer, Hemigordius<?;, for example. In the
Buekke Mountains in Hungary a
black bituminous lime~>tone yields
G. bel.'eroplwtllis with Afizzia veleIn
bitana (JABLONSZKY, 1918).51
Yugo-Slavia it occurs at several
places as reported by many au·
thors; its coexistence with G. ttO·
dosum, VcrmiPorella velebitmw, M.
Ncoschwageritza
velebitana andsp.(!) is noteworthy.Sl (KocH, 1932).

0:

attained its acmic
prominence with the Sosio stage, as
did M•zzill in the Artinskian andlater on.
5) According to joliNSON's compilation(1Y42).

4) Gymuocodiumn'Occurrence of G_vmnocodium, a Permian Alga, in Japan.

1-IERITSCH (1934) described it with M.
velebitaua and a few other fossils fromthe W aagenopltyllmn indicum bed of the" Upper Permian " limestone at Zazar
and with M. velebitmza, Productus richt·
hofeni and minor foraminifers from"stratigraphically highest limestone beds"
at SomiS>. The most eastern locality(1-IERITSCH in K'inw, 1933) is Isfahan-Saidabad basin, in Iran, where it is accompanied by M. velebiiatza, Parafusulina
sp., Amblysiplzonella sp., WaagenoPhyltum sp. nov. (HEIHTSCH), Pt·odtectus
djulfensis SToY. and some other fossils.
Parafusulina sp. which is the solitary
fusulinc from the grey black limestone
may be correctly placed in the genus,
but the fact that another limestone closely set to the parafulinid l;mcstone yields
Polydicxoditla pcrsica KAHLER must not
be overlooked. JoHNSoN (1951) describedseveral gymnocodians including two new
species from the polydiexodines-bearing"Late Permian" formation in the Ap:1che
Mountains, Texas.
In summarizing these occurrences,
Gymnocodimn is almost restricted to the
Ncosc1twageri11a (-? Yabeina) Zone in the
Tethian province and to the Polydiexodina
Zone in the Atlantic province (TnoMrsoN,
1948), if the dubious Iranian one is
ignored.

Gymnocodiumjaponicttm KoNISHI, sp. nov.
Plate 20
Materials; Beside a few individuals
exposed on eroded surface specimens include numerous sections, longitudinal(11), cross (ca. 40), tangential (8) andoblique (ca. 100), all from Imogadairalimestone and stored in Gcol. Inst., Univ.
of Tokyo.
DescriPtion; Colony shrub-like, repeatedly ramified, composed of elongate,
tubular to club-shaped thallus, all segmented, as recent Halimeda or Galax-

217

aum;
each thallus
subcylindrical,
though somewhat constricted or expanded at places, terminating at apointed or blunt tip, sometimes almost
rectangularly dichotomizing and provided with protuberances of various
size. Thallus 10 mm. at the longest andits width ranging from 0.75 mm. to 1.50
mm.; it is encrusted with lime around apith-like central stem which is composedof branching a'ld twisted filaments withgreater thickness (0.024-0.0~0 mrn. ), if
comtured with the other species. Pithfairly thick (0.33-0.48 mm.), relative tothe outer diameter of the thallus; gradeof calcification, however, quite variable.
Branches radiating from the pith obliquely to the axis of the thallus and open
their outlets on surface; branches widened, generally from base to top, at firstforking into very fine threads, abruptly
thickened as much as scores times, andcontinue to expand constantly till theyterminate at an elongate cone; somebranches, however, irregularly constricted
or expanded with irregular intervals. The
angle between the branches and the axisof thallus 10-15 degrees at their branching po!nt, 20 degrees at the thickened
part of the branch, and 50-70 degrees
when they reach at the outer layer ofthe calcified wall. Some branches repeat
to bifurcate in a vertical plane from thevicinity of their junction with a pith,
where no partition exists. Pores of the
branches distribute on the surface withregular intervals; some 20 of them count·able in 0.5 mm. square of surface. Sporangia spherical to oval, 0.27 to 0.48mm. indiameter, located near the border between the calcified wall and pith. No other
difference seen between fertile and sterile.
Observation ; Although nothing can be
mentioned definitely of the articulation
among the thalli, several specimens aresuggestive of segmentation as indicated218

Kenji KoNlSHI· Measurement; (in mm.)

I Length

I Size pores
5.38 I
0.055±.01
of

L/W

7.79

I

1.45

pp 7198

6.51

I

0.89

i

7.32

I

0.080±.01

9.30

I

1.34

I

6.94

I

0.061±.01

6.77

I

0.93

I

7.28

I'

0.075±.(}1- - -II

PP 7197-a
--

10

I

Width

I

PP 7201 (Holotype) j

pp 7200

1

I

- -

- -

I

I

427

PP 7197-b0.6.'1

6.58

I

I

0.08H.Ol

Length

r·0
/

'

0.2

i

{/'~
-~I

ll-~

5

uatn
1.0

0.2

l.f>

0,4

Text-fig. 4

Text-fig. 2
Sl::c or poresJ

Longer

D-1

•latb

s-:s
1,5

.. os

...' .
'

I.... ··',

B-1; G. be!/eroPhontis PIA (1926 & '27)
B-2; G. bclleroPhontis OGILVIE-GORDO~ (1927)
B-3; G. belleroPhontis PIA (1937)
J ; G. japonictmt, new species.

,l.O

Short•r
Width

0,5-r-.-.--.-.-~~--T--r-..-,--

0.5

1.0

Text-fig. 3.10

Text-fig. 5l..5in 0GILVlE·GoRDoN'S illustration (Textfig. 6). Moreover, a curious specimen
shows that a tip of smaller segment
is united with a pore, instead of a tip,of larger segment.
(Plate 20, Fig.
9). Therefore, the segmentation andmode of growth may be similar toOccurrence of Gymnocodium, a Permian Alga, in Japan.

those of recent Codiaceae. The thallioften dichotomize with an angle of 80-90
degrees (Figs. 7 & 9). Structure of the('.<'1:;11h}~'i:~ j

\'~~i

~

-l'~

)~lj

,;
~'

n(~

\q

Text-fig. 6. Gym11ocodimn belleroplzontis(OGILVIE-GORDON, 1927, Pt. 3, p. 70)( x ca. 4)

central_pith is ill-preserved. The central
body is frequently free from lime en·tire\y and filled with transparent calcite
crystals as seen in matrLx. Thick, darkcolored and tangled fibrils, sometimes
bifurcate, transmit into the structure-lesscentral body with impure and semi-transparent calcite filling. Vertically but
irregularly bifurcated branches are obsen·ed in several longitudinal and tangential sections, while any horizontal one,as in Vermiporella or A1ztlzracoporella,both dasycladaceans, is not recognized
in a whorl. Simple and ramifying branches are arranged without any regularity.
Constriction of the branches is scarcely
found. Number of branches on a whorl,countable in cross sections, varies from19 to 42. The collection contains only
four fertile specimens with obscure sporangia ; in a few oval ones their narrowerbase is attached to a tangled filament.
There are at least two pores on asporangia, through which spores may get
out.

219

ComParison; PIA (1937) made specificdistinction of Gym1wcodium with reference to the shape of thallus, size of poresof branches, size of sporangium, gradeof calcification and others, where theformer two are also accepted by
JoHNSOS (1951). The known species6>
may tentatively be classified by their
outline as follows ;1. Cylindrical but s:>mewhat constricted.

2. Strongly expanded
and pinched.

3. Spheric.
4.

Moderately bulged.

5. Compres:;ed.

G. belleroPhollfis?> (PIA.
1912. and later authors)
G. solidum PIA (1937)(?)G. cfr. fragile JoHNso:-; (1951)
G. 11odosum 0GILVIEGORDOS (192.)
G. /orcepimtm }OJINSON(1951)
G. fragile PIA (1937)
G. motliliforme
PIA(1937)
G. temllum PIA (1937)
C. fexatllltll
JoHNSON(1951)
G. compressa PIA (1937)

The size of branches is not much different, except G. bellerophontis. G. japOiticum closely resembles G. belleroplz.
o~ttis7> in size of pores of branches, position of sporangia and also in generaloutline, but the former has the more
slender and elongate outline of the

6)

G. caneum PIA (1937) is omitted here

because neither description nor illustration
has as yet been published.
7) Because of RoTHPLETZ's (1874) original
paper is inaccessible to the writer. theconcept of G. belleroPhonlis is obtained
from the PIA's description ( 1912 and later)which agrees with that of OGILVIEGoRDON. It is, however. noteworthy that
according to her quotation (1927, p. 70),
RoTHPLETZ's bellerophoJJJis differs considerably from Gymnocodium belleroPhonfis
PIA in size of pores, even when the former
is ten times magnified. (See Postscript, p.
220)

Kenji KoNISHI

220

thallus, and has longer internodes andlarger size of sporangia.
Occttrrmzce; Beside indeterminable corals, .gastropods and ostracods, the limestone of Imogadaira contains AtractylioPsis (?) sp., Gymtwcodittm japonicum*,s>Tetrata:xis cfr. conica+, Cribrogenerinasp., PachyPhloia sp.+. GlomosPira cfr.
pusilla of OzAWA (1925), G. sp., Codonojusiella sp., Sdzwagerina sp., Neoschwagerit~a cralit;ulufera*, N. rotunda+ and· Ncosclzwagerina margaritae (?). Judging from the assemblage it must be late
Early Permian to which roughly corresponds the age of Zone of Neoschwagerilla· Vcrbeekina.
PoslscriPI: Recently the writer had the
oppotunity to peruse the original description
and illustration of the genotype of Gym>~o·, .codi11m. RoTH PLETZ described as: "Sie bestcht aus Iangen, 1/2-1 mm. dicken, ungegliedtrtim Rohrchen, die von einfachen, in Quincunx
gestellten, etwas nach oben gcrichteten Poren·
caniilen durch sctzt werden, welche 2-3 f'· dickesind." (RoTIIPI.ETZ, A. (1894}: Ein Geologische-Querschnitt durch die Ost-Alpe nebst Anhangtiber die sog. Glarner Doppelfalte. Stuttgart.)

References
DUNBAR. C. 0. (1942): Permian faunas; astudy in facies. B11il. Geol. Soc. Amer..
Vol. 52.
Ermo. R. (1950): Late Paleozoic Calcareous
Algae from Kitakami Mts. (abstract) ]o11r.
Ceo!. Soc. japan. Vol. 56.
- - (1951-'52): Stratigraphical and Paleon·
tological Studies of the Later Paleozoic
Calcareous Algae in Japan. 2 Pts. Trans.
Proc. Palaeont. Sec. faPmz, N. S., Nos. 4-5.
GERTH, H. (1951): Die Ammonoideen desPerms von Timor und ihr Bedeutung fiir
die stratigraphische Gliederung der Perm·!ormation. Neues ]altrb. Abt. B. Bd. 91,
llft. 2.
8) · + and * indicate common or abundant.
respectively.

HAYASAK.A.' I. & MA'l'suo H. (1951): On the
Permian Fossils from Oguradani. ~ojiri.
Kamianama-mura, Ono-p;un, Fukui Pref.
(Prelim. rept.) ]our. Geol. Soc. japan,
Vol. 57.
HORNIBROOI\, N. de B. (1951): Permian Fusulinid Foraminifera from the North Aukland Peninsula, New Zealand. Tra1:s. Roy.
Soc. New Zealand, Vol. 79.
JoHNSON, J. H. (1946): Vme-secreting Algae
from the Pennsylvanian and Permian of
Kansas. B111l. Geol. Soc. A mer., .rot. 57.
- - (1946-a): Late Paleozoic Algae of !\orthAmeriea. Amer. Mid. Nair .. Vol. 36. No.
2.

- - (1951): Permian Algae from the Apache
Mountains, Texas. ] o11r. Poleo11t .. J'ol. 25.
Joii!\SON, J. H. & DoRR. M. E. (19-12): The
Permian Algal Genus Mizzia. ]our. Paleon/., Vol. 16.
KiiHN, 0. (1933): Das Becken von Isfahan·
S:~idabad und sdne alt·miociine Korallenfauna. Mit Beitragen von F. HERITSCH
und F. KAHLER. Palclot~logr., Bd. 79, A.
OGILVIE-GoRDON. 1\1. M. ( 1927): Das Grodener-. Fassa· und Enneberggebiet in den
Siidtiroler Dolomiten. Abltattdl. Geo/. Btt11•
desamt. Wien, /3d. 2-1, H/1. 1-2.
- - (1934): Geologie von Cortina d'Ampezze
und Cadore. ] ahrb. Gcol. Buttdesanst.,
Wien, Bd. 84, lift. 1-4.
0HTSUKI, Y. & KlYONO, N. (1919): Geological Map and its Explanatory. Tsuruga
sheet, Jmp. Geol. Surv. ]apo11.
OL-TMANNS. F. (1923): Morphologic und Bio·
Iogie der Algen. ]et~a.
PlA, J. (1912): Neue Studien tiber die triadischen Siphoneae verticillatae. Beilr. Poliiont. Oesterr.-Ung. 11. Orients. 25.
- - (1919): Katalog der Diploporensammlungdes naturhistorischen Museums in W'ien.
Nal~trlz. llfus. Wien. Atm., Vof. 33. 1\'o. 1.
- - (1920): Die Siphoneae verticillateae vom
Karbon his zu Kreide Zool.·bot. Gesell.
Wien Abh .. Vol. 11, No.2.
- - (1926): Pflanzen als Gesteinsbildner.
- - (1927): Thallophyta (in IIIRMER's Hatzdb~telt der Pa/tiobota11ik).
(1928): Die Anpassungsformen der Kalkalgen. Paliiobiol., Bd. 1.

K oN ISHI: CymiiOCOdttmt

Occurrence of Gymttocodium, a Permian Alga. ·in Japan.
- - (1937): Die wichtigsten Kalkalgen desJungpalaozoikums und ihre Geologische
Bedeutung. 2e Congr. Strat. Carbonifere.
Heerlen, 1935. Comp. Rend.. Tom. 2.
THOMPSON. M. L. (1946): Permian Fusulinids
from Afghanistan. ]our. Paleont., Vol. 20.

221- - (1948): Studies on American Fusulinids.
Protozoa. art. 1. Paleot1t. Contr. Univ.
KottSas. No. 1.
YABE, H. (1948): Neos::hwagerininae Du:mAR
and CoNORA. Proc. ImP. Acad., Tokyo.
Vol. 24, No. 9.

Explanation of Plate 20.
Gymnocodium japonicum KoNISHI, new species.

Fig. 1-a. Longitudinal section showing the outline of the thallus with central body which is freefrom lime. Branches bifurcate repeatedly near the center of the left wall.
Fig. 1-b. Oblique cross-section with an uncalcified pith.
Both (Figs. 1-a & -b) are sterile. (No. PP7201 Holotype) ( x 10).
Fig. 2. Longitudinal section of an imperfect thallus with a pointed tip and pith structure composed of twisted filaments. (No. PP7198) ( x 10).
Fig. 3. Longitudinal section of an unsually slender specimen. It shows irregular disposition ofbifurcating branches. (No. PP7200) ( x 10).
Fig. 4. Fragmentary thallus with an uncalcified pith exposed on weathered surface. ( x ca. 5).
Fig. 5. Longitudinal section of a fertile thallus with two oval sporangia.
They join with tangled thick filaments. (No. PP7197) ( x 10).
Fig. 6. Two cross sections. Pores of branches are di~tributed irregularly.
The specimen on the lower side is coated by Osagia. (No. PP7195) ( x 10).
Fig. 7. Obliquely longitudinal section of a ramified but ill-preserved thallus. Pores are regularly
spaced on surface. (Fragments.) (No. PP7196) ( x 10).
Fig. 8. Cross section. Elongately conical branches are seen on a whorl. (No. PP7202) ( x23).
Fig. 9. Obliquely tangential section of ramified thallus. the left branch of which is almost destructed. The disposition of the internodes of the right branch is suggestive of the segmen·
tation. See page 218. (No. PP7199) ( x 10).

222

Proceedings of the Palaeontological Society of ]apan
1

PROCEEDINGS OF THE PALAEONTOLOGICAL SOCIETY
OF JAPANr f:l <t>=·1ii ~IJ?n:¥=4};·!.('; 50 l!llf9114};J JTBln 27 ~6 JJ 22 n )~o;ck~llP.~~ :11!!R~~~=- ~, -r!mfN!T ($•§~tX· 64 ~)o ~iiJi~Jl[~:.~lli}(:l~~O)fln L.o....................................... Hiroshi OZAKI-*:filii Anadara granosa LINN.:;*:Ott: -?If'<:

Palynological Study on the Kamikita
Lignite, Aomori Prefecture, Japan ....
........................... Shigemoto ToKUC'AGA-'f fi~ fS'i .ll 11liJW 1H- q;) 1!1-I!U:~tll. 1\l ~ A<J ilf!ll: ...........................................ff.ite.=::$The Fossil Flora from the Nishitagawa
Coal-Field, Yamagata
Prefecture,
Japan.-U .................. Toshimasa TAS-"1~~MI.II'Ii~'ti\A-:tJi•UJ 2, 3 Jc--:>.,,oz: (f~ill\!) .......................................... tl.rt3ff:n>
ftr.·lltf~}:i~lfi/Jti1~.fi4!tloftl .................. i«~~ill*·ll.)/ifl~f.f.UJi!l1Jnfilltc-:>v'<: ......... iff.m~*llli!!il'.:k/f.\81 SltirakioPteris (ftltl\l) ill!l1ll-!J~•,-i>;~lf,l;;.j,; i 1tJII>V:Jt-*~*-11]l/(i)fHt.fi IC -? .,.
<: ............................................. i«~lli!:~
A Fossil Palm in Kenroku park at
Kanazawa ..................... Yudzuru OGUR.o\
Foraminiferal Assemblage of the so-callFormationsined Sandy-Shale]ap~nese Oil Field of japan Sea Side...... ..... .. . .... ...... ... .. .. .. Takayasu UcHio
New Records cf some Foraminiferal
Genera in Japan ............ Takayasu UCHio~~r.~ t~u~milt ro J[~tl!:.&v: ~tl!:'fnlm
tt~e -?~,-c ................................. f.limt-F"E~IU~_;f,; iltitl!l8: f.\-JIITfi"->{tE;fHl..!V. tc-?

... ,-z: (ft£) .............................. ¥H£.::::lill
Miogypsinidae "->~ltt (ftl!i:) ...... <f:/RIE~lill;ftJ¥ii:ii!i~:-:*-fffl.!l1.1tM"tc-?v'T:

iUf l'~

M-=riT:ii4Ji!!/1"->1tT!tt:-:>v' -c ......... &-*raft
1:1 *·ill'i Palaeopneustidae tc?"', -r:(f'\:J'JI.) .................................... ~~ ,1:1
Terebratalia? imraieiJSis (HAYASAKA)
from lwate Prefecture (ft~) .........
lchiro HAY AS AKA
On the occurrence of llfargaritifera
nwrgarilifem (LINNAEUS) in the
Conifer Bed of Ekoda, Tokyo. .. .......

"->~-Ntc --?v' T: .............................. ...... IJ•i\'li.l.t;x1l::1iU~"->ilf!ll: CJtv.> 2) ............... :*111 tt
Jlllj• t1i iff b· b ~J! -;; tl-1:. ~{1? !'t q;) J!. -(~.............................. ::kill

flll·mttil£•1•~"-> Pectinidaet£Otq;> 1)............................................. Jft'PJ:-¥--.IIIt-;g·dlllillii.MJI 2, 3 v.>fil.1tfit.::?~' c............ :................................... i¥Jil*~
On the Ontogeny of Neohiboliles... . .. .. .. .. .. .. .. .. . .. .... .... .. .. . Tetsuru HAN AI
Late Triassic Pelecypods from the
Kochigatani Group in the Sakuradaniand Kito Areas, Tokushima Prefecture, Shikoku, Japan ( fti!10 ........... ..
.............................. Koichiro ICHIKAWA
Early Nco-Triassic Pelecypods fromlwai near lt:1ukaichi. Tokyo Prefecture· ({ti5\!) ............ Koichiro !CIIIKAWA~!U!IhHl'i::f -;.o ~ 7:.- ni!="~.!lltc?v·-r.

<-tt iPJO ....................................... ;r-&!aA Study on Estherites nliddendorfii(Jmms) ............... Tciichi KOBAYASHI &Hisashi KUSUMIYounger Mesozoic Estherians from the
Tunghua Region in South Manchuria........................... Teiichi KOBA YASH! &Hisashi KUSUMI
Sundry Notes on Some Conchostracans.............................. Teiichi KOBAYASHI
P.!l~:ft f-fll'll&i!t -=r:F.t*M i111 "->~ ~ tt. h t~
t: 1" c Tha/assina anomala (HERBST)................................................ 4-JRJJil
On a New Land Turtle from Palaeogeneof Hokkaido .................. Tokio SHIKAMA;ite~~ .kliiJT j!!j:Ji9...*t-tJtH~1i •ill ~Lii;JJitf
t.::?v'-c (-'fl!l) ..................... "~~~1CJ: IJThJ!-atJ-tc:r7.-t:7.-1-JL-7.tc?

lf•<: .......................................... ~:Jt-'!1!~-*:ffltt: ~It o r 7. -e -'"- 1- 9 ~(Desmostylids) v.>l!iil'>t.::OOro-~~ ...... i!Ul>J~IIf:iA;l.; 50 lj!v.>fnJJl-:J!<~t.::,&~lt o 1i!M~!F
ilf~~ii!re ................................. ~ifll~:~t------------- ----- ------------------.,

Announcement
Bibliography of Japanese Palaeontology and Related Sciences
1941-1950
including papers published by Japanese authors as well as thoseby others which concern Japan and its surroundingsCompiled by

Ryuji Endo, D. Sc.
Professor of Geology and Palaeontology
Saitama University, Urawa, Japanjust published as a non -periodical publication of the Society.
Foreign subscribers free; foreign non-subscribers US $1.50
Domestic subscribers Yen 300; domestic non-subscribers Yen 400(Mailing charges inclusive in all cases)
Orders to be addressed to

the Palaeontological Society of Japan
Geological Institute, Faculty of Science, University of Tokyo, Japan.

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.•

CONSTITUTION
of the
PALAEONTOLOGICAL SOCIETY OF JAPANARTICLE 1. Name
The Society shall be known as the Palaeontological Society of Japan. The Society is a sectionof the Geological Society of Japan.
ARTICLE 2. Object
The object of the Society shall be to promote the study of palaeontology and related sciences.
ARTICLE 3. Achievement
The Society in order to execute Article 2 shall ( a ) issue the Society journal and other publi·
cations. ( b ) hold or sponsor scientific lectures and meetings, and (c) sponsor collecting or
field trips, and lectmes.
ARTICLE 4. Membership
The Society shall be composed of persons who are active of interested in palaeontology or
related sciences. and shall be known as regular members, honorary members, and patrons.
ARTICLE 5. 1hc members of the Society shall be obliged to p:~y annual dues to the Society, forwhich they shall enjoy the privilege of receiving the Society's journal and of submitting
papers which have been read and discussed at the meetings for publication in the Society's
journal.
ARTICLE 6. Administration
The Society shall have the following organizations for its administration.
(a) Gt•neral meeting. The general meeting shall be composed of the Society members. Morethan one tenth of regular members shall be present to hold general meetings. Administra·
tive affairs shall be rlecided during the general meeting.
(h) !'resident. The presidt>nt sh:lll be elected from among the regular members. The president
shall represent the Society and supervise its business m:~tters.
(c) O>uncil. The council shall be composed of councillors who are elected from among theregular members. The council shall discuss administrative affairs.
(d) Business council. The business councillors shall be elected from among the council members, and shall administer husines.<; affairs.
' (c) Officers shall be elected by vote of returned mail ballots, as a general rule.
ARTICLE 7. Amendments lo the constitution shall be by decision of the general meeting.

By-Laws and Administration
ARTICLE 8. The Society's journal shall be issued three times a year.
ARTICLE 9. Regular members shall be persons who have knowledge, experience, or interest inpalaeontology or related sciences.
ARTIC!.l': 10. Patrons shall be selected individuals or organizations who give special support to theobjectives of the Society.
ARTICLE 11. Honorary members shall be persons of distinguished achievement in p:~laeonto!ogy.
The council shall nominate honorary members for decision by the general meeting.
ARTJC!.E 12. Applicants for membership to the Society shall submit their full name, mailing ad·
dress, date of birth, occupation, and name of school from which they graduated.

Dues
ARTICLE 13. Rates for annual dues of the Society shall be decided during the general meeting.
Annual dues for regular members is Yen 400.00 (domestic members) and U.S. $2.00 (foreign
members). Patrons are individuals or organiz:1tions donating more than Yen 10,000.00 an·
nually. Honorary members are free from obligations.
ARTICJ.J' H. The Society income shall be from membership clues and bestowals.
ARTICLE 15. The Society shall have one chairman, fifteen councillors, and several business councillors, whose term of office shall be two ye:us. They may be re-elected.

Addendum
ARTICLE 1. There shall be four business councillors for the present.
ARTICLE 2. The Society journal shall be issued three times a year for the present.