1:1 -It"'~~~~~~*·i~tTransactions and Proceedingsof thePalaeontological Society of Japanng f lJ 11 ~
1936

No.4

t\"E 514-516 ~1X :J'J(,ffiU)[Reprinte 1 from J our. Geol. Soc. Ja,pan, Vol. 43, No. 514-516.J

UUIJf£!iii:ti.G

f1~ 43:'£0Palaeontological Society of Japan

:k

§
~

CONTENTS"* Tl'ansactions

17. Pa1'ast egoc101L 1f;i I::tlt"'L ( 7 Ji 20 I3f1MO ··· · · · .. · .. ·1f[ ren Wif ;;Ie 62
Tokio Sun;:AMA, On the Gen us Pam,!jlegodon (Resume) (Published
July 20) .. . . . . .. .. .. .. .. .. .. .. .. . . . . .. .. .. . . .. .. .. .. .. .. .. .. .... 69
18.

"f ?":7 "":/*' J;l C1'CI.ssatellites fov eolat'l.ls (Sow.) o)~O)~ f;:&tL (8Ji 20 13 g:~O .. .... ... .. .. .. . .. .. . .. .. ..

. ...... fl·tili z El'JJ

70

K einosuke TAN, On the Shell Structure of Cmssatellitc.~ j oveolatt/,.s(Sow.) (Resume) (Published August 20) .... . ....... . .............. . 74
19.

Shigeyasu TOKUNAGA and Fuyuji TAKAI, A New Roe-deer,
CalJ?'eol~£s (Cap1' eolina) maya-i, n . subgen . and n. sp., from theInland Sea of Japan (Published August 20).· ............. "75

CalJ1'colu8 (Cap1'eolinc£) mayai tC)/X v'''C ni1a~D (8 J'l 20 8 wMO ..... .
··· ·· · · ···· ··· ··· · ·················.~m&~~~=n20.

K6iti SUZUKI and Kenichi ICHUiURA, Molluscan F ossils fromthe Raised Beach Deposit of Takai, Tat eyama-H6zyo-mati, Tiba
Prefecture (Published September 20) .. .. .. ' .. . .. . .. . ... .

.. . .. .. .. .. .. .. . .

(li1aW) ( 9 J'l 20 r:J 1i&~)' . " . . . . . .
..... " " .. " it'Y,i- - , Tlr ;tj. 'It
93

Yanosuke OTUK A,

Pliocene

T3Mbliffiflll~~{~rnr i'ili;JI:m iJ/I fl'(I!t Jl.1'~;o

21.

80

*

Mollusca

fromManganzi in

Kotomo-mur a, Akita Pref., J apan (Published September 20) .

96

fJ\ EEll\W,/J,p:t:l'mmi'*iltC'JJl.1'[-;;o Cfil:iIJl!) (9 }J 20 r:J t£~) *:Jg 1m Z ll)J 105

557-

1 7.. Parastegodon..li It: )jx L.. "'C

aurorae MATSUMOTO, 1918 :fi:: genotype c L-, S tegoclon minclanemis NAU~'IANN

lJzvt E lephas p lanif1'O?H FALC . & CAUTL . 1O-'lT.il:fi:: referred species .c L-t:
1);(;iljitlt~ .i/1-t.: l/;, 10-(' ib:O 0 attrorae :ttW:JJtfll~1 ~ tltc '~~'n;If Elephas tz:: A.,f1 btltc.;f£,2):5}1r.1O ~/v t(~ -C StegocZoniIT£f;;!·1O 1:1:J:liJI{r. IO*Iu.~~jlli(le 1:il:lHi'- :0 l/;, IO -C ib :0 0f~L-, ~~:101:J\'~*i> ~'hi'i·tlC :f:IJ:.!oJj5f~ 2 7( E:llm l1rIlHcjilll.~"-j';: , genotype c L- t: fi/f5E3~
t:r.f:ill"C·ib ~, 31... S tego cZon ?ni?~clanensis NAUl\fAKN t E:I T~iOJ IWi)l-'r:I'~l~~*L-il'~;nb .fVt-, El ephas p lanifj'ons F ALC. & CAUTL. (l'ifrDt ~ ~~ (Ie 'lttrr=m:-C, E:lltijlO'1i.)U\lc;t-t1iDpH~-C ib:O 0) l/;":(.m1iiJ1:i: ~ l£'!*~¥(; :fi:: jI,\J:::I:i>' ·J* b ~1Jc lOi>':5t fl)l-1t--j';:, 151iiB'~t1l!!.1O ·!1:)Ufi>'3't:5-}*1j 1l)}1t.--j';: , JffJIO 5~~Sfi>ql'jilIJ:~G-C ib ~tc. 0 :;JjJ1 ~:O (Ie CtU?'O?'ae ~~)It.JA I!ili1O Stegoclon airawana MARTIN tIC $l <1W. --c Jig.t:, D IETRICH, MAAREL ~1) l\1ATSU MO'l'O, H., 1929. On Pam stegocion lVIA'l'SUMO'l'O and its Bearing on tbe

Descent of Earlier Elephant. Eci. Rep. Tohoku Imp. Univ., Sendai, Ser. 2 (Geol.),
voL XIII, no. 1, pp. 13-15.
2) lVIA'l'SUlIIOTO, H., 1918. On a new Arcbet,ypaJ Fossil Elephant fr om lVIt.
T omuro, -Provo Kaga. I bid. vol. III, no. 2, pp. 51-56.
;f2: :2js;j,~( ±fj:J]'it~ e);g~K7\, ;t~ b ~L t~o

3)

DIETRICH, W.O., 1929.

Di scu ~sionof Matsu moto's papers in Sci. R ep.

T obok u Imp. Univ. Sendai, J apan, XIII. 1929. N eues J ahl:b. f. lVIin, etc., Jhrg.
19, III, pp. 466-467.
- ( 62 ) -558

r.t a~t?'o1"a e 'i:: ai?'Ctwul1U rD 1 ~1r.m! (re ~~·-f'c L. , Pa?'as ' egoclon m\l ~) X1tf:-:J-C, Steg oclon &JrD synon ym 1'C ~~·VJ.c~~tc o :jIJL ~J'!'C L.-c Jinkf Paj'astegoclon

IX. -3J!Br.t , Stegoclon c

A?'chidisko clon (planifj'ons'i::1;-tr ) (reA -3 ~ ~m'i::*~. ~kl'C~~~,.~ ~ ~ ,-,, ~ < m ~n-3GL.'-"o - ~I'C,')

P a1'Ctstegocl on /ri.J;U::.rD:!m ~ 3;!1! El:l (re J: -:::>-C , it'>"i ~ 1~~)fJ ~ n 1:cil,-:::>1c;f;l!'z-C it'> -'3 0

tr L. o riIjlml'C ~ nIX.il'-:::>k ~~R-Cit'> -'3 0 L ~ f~fiJtrD ](f.! < *IJJ ,1):JJ~;(Fjil'3::: c. L -C ,13 * c .~*~,~ -C it'> -:J-C , ~7/trDb"~' lre L -C 1~1!*1'C t~T -3 m:1fJ; < , .I;g3/<i$(:,~ o.)t~*'i:: Jf~:I&~ -'3 ;f;I1WdrD~~- ~-*,ltl'C Steg oclon c ~ ftiX L. -C 1i§- -3 ~JIJ("C it'> -'3 il, G~"iiffillrD~:f;lkil' IX. '-" rD -C ib -'3 0

1'!$-'3 (rc:!lili:*;P[iJ: !J a~t rome (dJjL.k ~ rD 1~'!*il' ~r& ~ ~!l&~Hi~n01'C:¥

rD Stegoclon rD ~r.J1* (,j: ~r&!J 1.f.tt~-Cit'> IJ ]J!~h ~) rDc'it'>::t, 0

gn ~ , L eiden

V!l!J1;Jfii'i~~:tl!!I[,ffi(VH(re f!i'1'Til'n k .I!!\\3/<i~¥f',~R(7) )Wf,W Stegoclon t;~*il' , ::J(~ lj!}:!I0.iiif:i rD
r:p ~& Stegocl on ~rD 1~*c ;jijg ~-C1.f.,:}~c T~1, r.f , ',~{I£~*;P~ -Cf!1!m ~ 7,'1-'3 Pa'r astegoclon (ct. , lif~T -'3J: IJ tl1!. IX.'-"~';~-Cit'>::t,o{n]' A ?b 11ft L. 1Ji}· -'3 :;;'Ji: ~ , Stegoclon
CAUTL.)

0.)g enotype k -'3

S. cli f tii (FAL C, &C Ctu?'orae il >-&c~~IX.~:m4'i::1f-r -'3~r·-c , ?aii§ 'i:::gg: L.IX. V> 0 !fl~ -jj /ri r!Ji';H~ Stegoclon rD ~IJ,:IIl:?b }JlTtLf:iI':ll:jIX. ?b rD -C it'> !J .1l1~ ~:IIl:?b jjJb{r. L.t~ ?b rD

k.'il' G-Cit'>::t,0;c L. -cIijlj;ff~ *ilf~i31:J1'C :iili.-:::>-cfjl-J-{-;f, jlli;f.2-1 L. -C L. "i ~~ ostego clon I~J 'i:: ~H!,~::t, ?b n!!2,~ IX. '-" ?b , JltrD jlli;jq-Ht o.){§JFi:!m{fiJ-C ib -'3 0

Pa?' CI -1.i4"I];j(1'C ',);1;-:::>-C ;fiil )7f'~'i::!~ tk rD ii , ~1~gJ o.) 'j,~(re , 7f:bi~0.)J:lUJ'~~:m4 ~ < , &' 1:1I:j~:m4 L.il, n{'.

Jt* , .1!!§3/Z:1\t,~rD )Wf,W Steg oclon (a irawanct, t?'igono ce phalus, '/n·inclan en sis)1-;]: S t egoclon lllif';~rD ~IJ-c?b i'iJnJi: !J 5j---1r. L.k n~,,-c ib -'3 ., DUBOIS lD ]mSiwalik rD Stegoclon c <D ~;milit;~ nP.!.~VJ..A?bIi§- -'3 iJ ' ,<, EP m:J ANENSCH ;~:tl!!. 1'C J:

IJ llS

1) MAAREL, F . H " 1932, Contribution to the Knowledge of the Fossil Mam malian F aun'l of J ava, W etens, Meded" no, 15, p. 162,-

( . 63)-

Pa7'((~te,qodon

Jlll\ K )}X II' -C

JiX: D'I'IJ -J ~ !J d:: R£Z I] ~.:h tc. 0 O SBORN o.) :£Iu %, S tegoclon d::!lf- .~:; ?b, Siwalik ro
S tegoclon 7"):2",~ - d:: i) IJ * Mc o.) j(rl < ;}§-"L Ji5kt;li{-C10.Q o f!'\ L- , lfk:?b:i!!:1.\), L-kl/,ro/tt , g,< ro~*iJ ,t~illfivc!i!:· .Q j(n<, insi gnis d:: ganesa -C10.Q o ;f~·*I:(i/:: 1::0.) P al'astegocl on ~ro5EIf~ !1~l~~o.)~ itC L!iillil~i/tt subhyp soc1ont (tC L1&it

il:..l; < , T:&/tt{J'l~ m:i J:: !J flifl.L ~~ < , ~~:o.)£1f!\ 1!J: g,YM7C-t.Q ?b_ 1L(tCt~'tt -f , !~~il!'.Q'tt
bnk.Q'¥kl':t-1~Jf~!m7lUY3§:~I~~fJIDDIH::£L- , Loxoc1ont sinus ~fJJ~< 0"/JJeiflfo.Ii~3!(Jl'P ,~.ffi r)ij·f,~ Stegoclon (tC illiiYFJL- L ;Y JThI L-ft "" 0 1i~*iW·:I:: /'iPa1"a-

z:t,stegoclon (tC mincl anensis rol:i- tr::f*bn1t!!.0.) 2 fill:/tt S t egoclon Jf~itCAnb nkiJ> , J![:o.) l@:5-J-I'i IlJjIIf-C ftH'5)zitC }J;', J.,. o tJ L-6 DIETRICH ~(df'f: v. , 1t!!.ro 2 f:j[~?b -%- i'tt, .~3!Q~~ 0'if!li·ii\ll Stegoclo n ro J::J& 3 fill~ Parastegoclon (tC Anlvc. -r .Q roiJ>;fi, ro;}§- -C 10.Q

0

@fl i? ;f:IIWJ ro'§}!*o.) fifj~-r .Q S te g oclon ~ Parctsteg oclon

I)

Paras tegodon l':t::7ero 7 f'1fI~1.'tJ o
1.

P. a~t1'01"ae (MATSUMOTO)

2.

P. mindanensis (N1I.U:M1I.NN ) MATSUMOTO

3.

P. tdgo nocephalu.s (MARTI N ) SUIK1I.1IU comb. nov.

4.

P . ail'awan't (MAH'l.'IN) S U IKAlI{1I. comb. 110V.

5.

P. akas! i ensis T ' IK AI

6.

P. in fr equens SUIKAlI!1\.

7.

P. 7c~vantoensis TOKU N AGA

1) {Il! i:: )'&ili:~!&\7.kji,\(±P)j-~li <1) Pa7'aste,qoclon sug·iya71la'i T OKUNAGA, 1935. ;3> ih;;, 01:\: 1:: J: ;;, c, airawCLlw (':: Ili:'i(J;), L filI (1) Ji1;J])I;n: JR"..Jjlk~ K J: ~ J!1:JJIJ ~;tl;;, c. 11l;JJl!;
Y11JR enamel plication tl l1TliX ~;T Y?- - I, tt'I1:'i1ta:;f-! L.., :flIU19J,jf7JIJKm lJ'11};;' f~E Ii!!11l L..
td~'i1t a: J't-fliil i - ;;' c. tl:'/§",,,- G ~1-ft 11'0 /!~Cmj:;l'i71;:: Ii: Will fJ: II'llR ~ , liHili tt 'I:1,'i1ttl!PUfi}j L..tJ: iJ'l;£' '1:0ih;;, 0 sug-iya1na'i K '?II' L tl?l~/p G:'/§"~J: ~ I:~~~'~ i-;;, 0X, Jl.\lili('C tl Stegodon t1'igonoceplialus p"raeCU1'SOj' KOENIGSWA LD, 1933. ;Ii' ih ;;' 0S. t. tl'ig011 0C(1Jlwlus J: 9 mr~M19 tJ: - mIfill c. ~ ;tl L Jlil-;;'-( 64) - .-

0

,

56{)

.*mf';t S t egoclcntina e

O SBORN

C. Ma?n1n ontina e OSBORN 7J '·:1"1 :J ~-t'~tl:.,{:1f ~Jl.1illJ L, S tegoclon c. A 1'chidiskoclo n, P arelephas ~ c. wi*1'J: ~rut~ YC 2b ~ 0 1{~.*t~IJ.:I:C') 1~H' GtLk~5E~t.[;l.5'F[f YC , S tegoclon ·c. w.:ZiJ -t ~ ~::;7(C')'li1t ~ ~:/3H' ~0

a . . ~mliir f';t5i'~ 2 :;icF-:l1liT"C'fiJl& 9 .[;I,J: , ~(J; 3 7(F-:lliii"C'ffJl& 13 .[;I,j:, n~~K 15 K~-t ~ 0 S t ego cl on --c' I'i~~ 2 7(F-:llffit&!l&C');J;Mn[[21'-:itj 8, ~~ 3 7(!::llffi C') lkJl&f';t 13~-t ~oS . cZi f tii f';t 21'-:itj 3, S. insignis

t 3,' S . o1'ie ntalis f';t 3.5, S. sinensis

t 3.5, A 1'ch icliskoclon plan if1'ons f';t 4.5 "C'2b ~ iJ' G, r~jJiJjli!t vi p lanif1'o1H K'IZHt& L, cli f ti i C');f:1 2 1~K ~-r ~ ;::J;f.iJ' 2b ~ 0 S . o1'ien talis sh ocloensis MATSU (1)~WTO, 19 24 ( 1~)(Wt*1'J:<l~l ~ ;Hl -ef;S-1'J:\.A) (l.)]j-f';t1HMt 4·. , 4 .5 C', Stegodon

Wr5/<::JgjC') t C') c'ib ~ c. (1)~T-"C'2b ~ iJ>, lili Z iJ tH 31~Wftv- Q ~K *flIl:('C A ~~' ~ t (1)1'J:tLlf'lf.r L{3iJj5'j-"C'!b ~ Q
z.~C')·liii:i[-f';t~-t ~ 11C1MJ~ <~ 7J ~J~V. m! ~*:m L -e.m:-~ IICJJN~'1'J: V-ob.

fiK id: n;ifK, !F;'f)] IJ C') JJj-g"

M ch iclis lc oclon 1£~ L < 1'J: \.AiJ' ,· n-rjfnl~}JrRJ. (2)",C')7'1' -t7'1' 1'J: )J~ n! m esi a l exp an si on ~ ~T 4j1: 2b !? 0c. f£'i!i~' Jl'l:l1']1'l'l[ltrA:jj j- 2 Jl!t11C 5j"tL, )~ CE f:t j'i;..q Ji'1H~lfiJ', 30 t lA:jJj!rC') j; iJ'>)Ij[\.A o S t egoclon c'f;j:-JiJx:l'C jj-Jcri.6~L< )~v- o ·!!l:lJlpfibJ,*mlri:b't.i: C') ft5t31l:fJl~fj:jj-JEl-*MiJ;:~i~'tt GtL -e ,d,j j-J\JC') rAj'h41Xf';t, IA:J)ffi-:b;:Ji:iii:I±', L -em ~ C') c 'ib ~ 0~:!fl:[, f';t ~1'l ';!li; Jli c '51,=1fj;@f¥!:i&--tt GtL1'J: v-r:k~t)_tb Q

jtill!. Y£~~-t ~ ~ 'l~U~f f';t , ~j'K ti.~ 2 7(F-:lliij, ~r& 3 * E:l l~~jV',)m:17C')1~iJ) J:M J.: 9,5l!. -e, i1t!lJ;:11C , X/d: S ~':~I'bIIC, Xf';t Z ~1'bK iITl LiJl -t ~ 4j'f- "C'2b ~0z. f';ttkC') JJN~guWt1f

K J.: ~-:rmC')rr<!~/lEJ\I.~c. }J!. f';ttL, catag-en elJ s is ~ l;1- -efJt aJl L~\.Ao ~rL,

1r~ 3

7( F-:lliirfi!l& 13,..",.15 1iC -e, *IHK <IJ'71'bC')1!fHiiiillarlr.t , Steg ocl on *i1f~C')1&Jf~ c L -e
(1)~*fi;tt!I;:(2)

S IIIK AMA ,r:r;;j;:Efl7. T ",- 1,";/ (7);fill'i!i'i.
T ., 1936_!1k 'i't~~tfFoi1G 3 1~ -373-4 'lt~o

On Pm'astegodon infrequen s sp. n ov. from t he Akasi

Distri ct. J:t;l' rl"
-

(

65

) -

561
:ViJf~'!1~'(j: ~) 0:> '"'[,~ ~ iJ> G ,iJ> ':. ~rr,g '~II'J ~O:>~ tit ~, c7~ '"'['ib 6 '5" S, O?'ientltlis-? S , sinensis C'):tm~'f~Vj ~@[1iO:>i.J~mj(j:r£'"'['if)~o ( OWEN (rC J:: ~ o)PamstegocZon ':[3; ¥iJ! ·m ' G9 ·I:~Hrif'I'.IjU)j-tt:o lh c7~ Vi, a-i?'awana, t?'igonocephalus l!z
0:: akashiel1sis 0:> 3 :fill'"'['ib:O 0 cti'l'ltwana-t?'igonocephalus bi*-'j:lre ffiilfLlJi;c7~JI~

mt, jjfl'~l1'O:>Jl~!Ut~;t:1\J!. J:: D S. ganesa Ire 1JI-t :0 a7cashiensis 11: lj'i'H%zO:> Jl~mi:, s,J( 1)

XVi A, 'planif?'ons (rC 'B'I'T :6 a .~3fH~P; 0:> PamstegocZon C 13 *0:>i?'6signis

PantstegocZon Vi~'"'['~JH);), L L lh, Ii}!'liJ' (rC }j~"" -=c &'~ :O c }~. VikL:o (, 13 *0:> Pa?'astegoclon i.J~ A1'chicliskoclon C ~IiJt* ib :0 4!Jr·, p , -in!?'equens RV;' p, lLwctnto en sis(rC »~''''' L f;![:I,~ GkL :o ~JJ. -C'if) :O a 1H L II·r] fill'I Vi S. o?'ientalis -C,;L c S, insignis i.J~
I"JNIiJ>~i.J ,o:> [I,VJ ilml1:friIiITtro:>:fillc (j:-0td>, 7lUc o?'ientalis c7~i'if!1-.l' 0:> 5G~td':1JIt~

lh 0:>i.J, lh :1:I1~'L (j: "" ainsignis , Q?'ientalis, ganesa, ai?'awana, ct7c ashiensis ~Mmlm 11:~0:>~[3:9i!;DitJJl mesial

I,

I a.

exp ansion (j: La

fk!JiJ~liit , J:%'f,i~~ 2 *E:Ill'ij(rC L

I a',

100 ~:l/13 5 } j :3?: 6,

J:1ij1i~~ 2 *8~0:> fkJJ.& 10, ~:!1:~~ LiJ' G-1", ll'iiJf.L~Il'H~j~
Vi~ L< 1.'2I J I~ · ....... . ..... .... ' ...... . ' '.' ...... ,p, a'IWO?'ae-C'if):O . . " .. , . . . , .. . , . . .. .. " ' .. . , .. , ., . . " .p, akash'i ensis
I b,'f&J}J~lLI:%"fitf~ 2 7(E:Ill'ij(rC L

/

I b,

J:1ij1i~~ 2 *E:IRNlDf&JJ.& 9 ) j :3?: 10, 'f&Vi~;j~Jl~(rC L,~1:fn'(1)

100 ~o~rl' 5 .1;J, T a

SmKAlIIA, T "~ff&

Stufenb ildul1gen ib D .,',"',",'" p, t?'igonocephaltts
1936, Note on Pm'astegodon akashiensis TAKA! from the Akasi

District, Proc, I mp. Acad, Tokyo, vol. XII, no, 1, pp. 22-24,- ( 00 ) -562-3tm long itudinal cleft ,ib!J. ... ... . . ... . ... P . m inclanen/3'is

I b'''. J:.%Yi~~ 2 :*:r::I Jit,I0-Yf~mv: 9, :tl!HL:71,* . ...... ... .. ... ·P. aimwana. ...... . .. . . . ... .. . . . ·P. kwantoensis

lIb.

r%Yi:1Oi'~ 2:;1( I::ll~J(Ie--C~~t\t 100 ~:'f:"134 )'J3'i 4.5, f&r.t 2j:£:f=j't:r b -f'~!lJ illii(le 1m< .. ... ..... .. ....... .. ...... ·P.inf 1·eq1(,enS

P al'astegoclon cD*i11[(:I'~1ll:TI1Ir.tl!i:1t g-~~~iJ~ib:O 0 ;f1-*1~9:±r.t Z ~ Stegodon,!: tt:f Lk.@t~~cD ~(Ie AfL b!/1.,?-& b< bombif1'ons ,!: .1[l. r.t~'L:O S tegodon J:: !J ,Upper P ont ian (Ie i*~ Ltc: 'b cD--C ib G '5 C '2'!/1. ,r:Pt\t--13 ;zjs::iJ~5.i'~"13 I L·!u!' --C

i'h !J , Aschidis7coclon ,!: r.t1!!~~rut~--cib :OiJ~, Pal'ele j- has cDffill.~--Ci'h b '5 c '2' fL--cm:o 0 r;Jj·--C .Il:l:. cD:ifki&cD;}§-lifit:ilIcDJfi1ll:FJ'~i;;j·~:-+c ;;fJThjT:O 0 P amstegodon Ii ;~lt
'jj-[!t ~ --C~1f- L --c m.:o L, i: Iv t:r (Ie r!i~cD Jb cD C ;}§--" b fL t:r \.r> 0 A1'chiclis7c odon,~

Pa1'elep has ,!: cD~dilIDl[Ii:% ~ if] iii ~ 1:/:1, 31~t:r \roiJ~,

tinae (re A fL lv C ~:tL:o cD--C i'h b '5 0:%(Ie fEJ , Mammontinae

Mal1~montinae (reAfL:O 7J' Stego dontinctC'(Ie A fL:O 7J'r.tZx.fri~/±'( 31Q)!lli\.r>o jjJ~.illIHcD 93rbMa~'~j~f~:f!f--::J--C m :ot--Ji--C i'h:O 0;f:L r.ttr Go Al'chidiskoclon C ~rut~iJ~i'h--::J tc tlt(le;}§--"I1t\t>o
A l'ch idis7c oclon (p1'oplanif1'ons, sUbplanifl:ons ~ ) Ii 7 7 ~ }J (le lj~\.r> --C1£~

L, J:.'l1lImX"'Xfrilt O)I¥i-JtI\, lmtll, *'l1lI.illI*m.illIcD ~t&jUl(le1*v.. , ~m-I7J' b J!g:3/~~1'f,~ , 3t7}~'~ --C(le Ef:O :;IdtllDJ:t ~f-1~f:1 Lk TlTr&: !J -{fL-[!tJ1!.(:I'~ t:r~--C ib:O 0 ',ili;n~4tllDJcD 19f[f,(re ',lJf;-?--C mk i }~. lifL:O *1¥i~B.illI*In.illI, m1:EcD .~31Q¥i'~ , l¥i3t1J~t-l!f., *3t;JJ~1(jj;~¥cD ft\;,
ilm.t:r !U!. }j(re jj~\\.r>--C Stegodo n cD 7°1I..>.:: - t:r *iW~ c 5(rtJ;Ltc: --Cib b '5 0 13;zjs::(rePa1'elephas p1'otomammonte1tS cD~fLkfk'J.1-t(re ~:fol'illh' T :0 0 @.n ~J::.'l1lIff.\'('~kllt(lel~\- ( 67)-

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f'llt.l-< fjiJt§' ~ c!dL , h'ffti%G');j:'X[jfJ ~ ~ nk ~(1:f~:5t:i:ltC w: < ~F.Mt3X L i-

To
(Resume)On th e Genus Pa1'astegodonbyTokio SHIK AM A
Pm'astegodon is a ya lid genus, th ough it littl e di ffe rs from t.he gen us Ste,godo?? ,.
a n d specializati on is' continuous from one t o another , Japanese species of Pam-st,~godon are closely related t o t he M!tl ayan fo rms of t he' so-called Stegodon (mind(£?1 ensis, tl'igonocephalus an d aimwcma) ; t he latt er like th e for mer are distinct fromt,b e gen otype of Stegodon. Pamstegodon cont a ins tbe following species ; P. aUl'orae~MATSUMOTO), P. mindanens'is (N AmrANN ) M A'l'S UMO'l'O, p , i1"igonoceplui lus-(MARTrN )'SIliKAMA, p , airawana ( MAR'l'lN) SHIK A}!A, P. al;ashiensis T A1UT, P. injreguen.~ S m K AM A and P.

kwantoensis TOKUNAGA. F rom dental and crauological cbaracters, Pm'a-ste.9oclon is classifi ed into t bree groups of a'imwana, akashiensis-ctu?'orcw and in-.ti:eguens-7;wa?~toensis, It is an oriental st ock, baving interm edi at e cbaracters between ~ Stegodon

and .A.l'chidisl.:odon,

In J apan it seems t o bave dissappeared at-t be end of tbe Ter tiary owing to its catageneti c declinat :on.

,<""., '-(

69 , ) -. -.

18.

~7' 7~~*Jt

Crassatellites foveolatus(Sow.f ) O)~;: (7) :ff1f~ Ie: :5i,;t-Cfl·H~

Z Ilj]

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(7) ~;[¥-~ IUJ 1b tr.

<5(';; 5, 6, 7 lfuil ~rl i~)*~ f1i}· :o K 3?/j-:J -C :7J<.1~ Lit 0 Iiln Cms-

satellites fo ve oZatt£s (Sow.) ~)1liUr.f'F)'f'J K J: -:J '-C.z: O) il[iiUnJJ rl 1'iI\5hj'it~l}%i!i{f; /j ~T:0 c , t(7) fmrliJ' Gt1MnJJ O) J~];?IJ7.6:m~:o C \(\~~i[tt*1'1l'j;Ii~ttI.J'~I'.IjLi)j Lit <0.
-r:ib ~o[II )~?,"5 ~v* ffi!

C. f oveo/att£s (Sow .) [ =C. y ag twai MAK I Y AlIfA

1927.] ~=fltf.J' ~I-C ~~ llI Jibt::I::K J: -:J-C~i[~fr:m~t~,'?*c lliirI(7)mHiJrlf1b' G(7)1r.
· 1:i(7) J::.K~~H!r c; ~It (7) f.J ;: lfktJrCib 0 0;ltiHl!(1C. 1929 (.Fmllrl~y.::I:: K J: -:J -C±11.c(7)fr!i(C'.xifrl'3iJ, G t ~~fi.L,5-~ d1.. -C if') :0 I.J', Y:ii']K lj~' 0:-C ict :fJ.~;f:jfI , 1r.1:i{:ITI(7) FI~~:h'::J~
K f1!}.G~, :m~fill:~1m1try:;hi1:!j;;Ij(1C. ~jift~ttm:(J)~tfJf.K!g, < ,1r.::r:J{:ITI~¥JEj(ilI I1Jli:U!jltJJ,(1)¥.IHHJ..\; C') f,tpfr=r-]\ K-C;<jqill ".:>,],;~ ·15(-;tfide L,,!y 1914 K{ft---.. r.J:, C.jov('oZatus (Sow.)

1870 ;V'lE L- < C. suZcata RVE . 1843 non LAM ARR, C. yarJ'um'i MAKIYA~,[A 19:17, C,.~ulcat(£ NOMURA

1933 non LuI. , C. l 'anehami YO "OY A~[A etc. ;V, Synonym t.J. ~ i!: ?:11

Q k o • • «V ~m K.~-C~*m ~ ~~i!:.~L-ko-( 70)-

(i38:ptEf;k15tR"*=fm-, m~J!iJ ' G*lrJt¥lH!f ~ n -C?;) {) 0¥Jt.)oll J: I) illiJ--ll Ltols:f1llG')INl'lllH!&:(!;t~!;; 15 {1Ii1 1'C~ L,

it!!. G')~!IJI1'C

J:~ L -C ~ \.A jj -e ii'> {) 0 ;L~1~*Vi :m1:.T'lIU: "ltil~ L -C {iiJ~:f-G')~iMj:<, .:e G')%i!J,(III). 'I:i'f~" Vi ft~ IlrtI,IJ. ± G') ~c;l\!( ill: fl~ L \.A i.J ' G, L L -c Vi 5&-" {) I'C 2~J£ t::r: \.A 0 ::J( I'C VE-*- U-J.*~*G') ' G')I'C.\.At~~~{) o

5it 4 hilil :-»xMijJJ Vifi'j1fW,-rc"tJ: < 1filiiG')tJ\'?*c_ljiJ;&~ill: ~~I'C ~~ L -C?;) {)0-t G');t)!&: Vi~rn J: ~ 13tYIMI'C~u;'?'t~Ht{:ijJJ (Cm:ina) -c'lli'lJ ~ fllt]1I:5J'.;Ii:: ~~\.A -C*,;; 33,('C~~ {) 0 %-ffJJVi .:en,.!:. 1iIIl-IflJ~Jll:'iG') ffJJlmr,lj; (Interstitial g ro ove , I'C J: --?-C ~r.:i-c G-fL-Cl.l {) o ijJJO)f/It!liJiOOId:19U"V;t , A9"Ca inflata RVE, ill:J.!.{)~ 5 xlDl'b-c' , 1i.;:(:jJl1frjiM1T'I5.R !J , .:e G')*OO Vi t'ffi'j) , -c-1'J: 0 0 it!!.G')_*-c- (!;t;Jt,-P L t IfrJtl-c"t;r 0;1)'> , 5i'~4~-c- Vi~Vi~rnJ:!J • •I'C ~ {) ~~-c-m~MI'C1'J:--?-Cl.l{)0 LG')~~~l'Cm~I'C lli:t'f:.! Ltdi!l:5J' -c- 3Z< I) j}K" ~ n,-C l.l {) 0 if.I&\ -C ffJJ Vi ;L~G')~Jt-C" lIft l).!&<J-C 1.;>.{)O

. 5it 5, 6, 7 ~ :- )lifiUffJJ V') J®-11. ~rn.&v: .:e OJ~ftlli:-c-:Ili t fJ;ljnl'b <, .:e G')if,lj;;i L
1t~!I:5J'~ WJl~r~~ {) C,

J:: t;r {) *ffiiffJJ oJ pg,~~7tjtIJ <, L n, c. r G')"llxMnJ]G') i!-.!:. Vi~1~Ij ?;MI'l5j Un, {) ~ 51'l: }Gl. Vin {) 0

" (lVJ)*G')f!~it~-3t7N{iJ\!~~ {)ItCO:m1:.f1lltl\'~*KJl;t0-Cit1j:)'I-~ f'f- ~ . Ln,~.~1J)!Z~r -C- W[Q~ Ltci):;m:!l Vi::J(OJ ~ 5 -e ii'> {) 0:l;i'~ 1 IEil G')*!;{:~1Yf-c- Vi 1l!..\1.f1\K m.:~U ~ n, {) 0

K (Konchinscbicht) JHJ!UG') ;j;j <i~J\.A11i\:5J'-c-~-Mfd~"~fk& ~ &1" {) 0
P (.Aussere Prismenschicht) illI;®:,J) tt )jk1~~il!L G') Ai-c- , }ljL ~ ~~G')*';; ]/3~ 2:1 co:ij( i=TB ~ & ~ {) ~P o(Innere Prism,- 3cht.)~i1"tG')m-JJll.:tt-~ L, }:f.~ ~1ll 0)if(J 1/3,

IliJ*

J: ~ 1i!jj~130
P", (Pe rlmutterschicht) ~"fl((5I~& , }!Jl¥1 J/4, 1!!Hil'~;:i:lli oLight green ish gray G') hig h order G');L~~+ * ==- ::7 )l/7) r --e~ jjf~7~15 G')

i!, ~ &1" {) 0::>77- -c-JHcJ1!V\VifiY.Z,co1'J: 0 0ii)~ 2 Iliiil G')f/It~1Yf-c-ViIliJ~ G') ::;I(1tl P /'C 'ili~ {) ]1\:$}It;t,-(71 ) -

Konchins chicht G')

i' 11''7 "" '" *Jl Cm ssalelWes fo vcalatus (Sow.) <o~<o tI~;\1!tI-c JlX-C

rK 7.k1fI7)Ifi3]!.~ffi 9~:Jj'-

639(G) c., ]l!K '2I7.)TK LlJ c~!d1i-3}1]1;Itlfil7.)~5}(R) c. K:Jj'-!1 GkL-3 o '2 17) 9" (G) fiiliffiiffhiJ, Gr&:-3~5}-Cib I), (R) l'i:lit~tffh7.J'
GtJ:-31~~;5J'--Cib-30(G) (R) fxPJ:tfI7)~mtf\I'i(: I7)~~-CJ: < 5}-3-?5KjJx!HffhK'jll!;' -3 *17)~,'j):Jj'--C rlJ::Ific. 17):fj[WI'IJf~ c. -1t-~l1f!.wH'~tJ: Jb I7YCib !J ,-r:, V/iJi:;?cili'<.I7) Jmj~ ~~ t '-c ~'-"K 7.k1:1'-C. tJ: I)

T1j Jb ?#fl'lJtl'Z

CPo) K:jf;-?-C 1.;) -3 0 @njJJjJ-:tffhl7)*17)1{-\15} -CI't (G), (R), (P o) I't In) -1i1t!Jo/rcj~~K1iiJ~iI)/Fill!~~tJ: c. L 07J>tJ: '-"0
LiJ' L:frI7) :gI\:Jj-@nijhl'lm\,ij;I7)1frl:Jj-I'i~TI~ill:tJ::t~a'1J~'17) lb 17)-C3'C).l!'t~ kL L b -3 ~~iJ''217) 1mf,!iJ c. I'i Uf.l II I tJ: ~Ji!. ~ ffi L L 1.;) -3 0
[VJ

1ifJ1l-?-c~tfi' -3 ;t:!lftilltl'i ttl!.17) ffil~g;HtC 1l:,J"t!. G.t1 Q iJ'K!1t,-" L 141);jc L1t 0{r.15' K

1fdJIi L -C b Q 17) ~ Ji!, Q L C. 7J>ib Q 0 LiJ' L '2 17) ~~~K ffi Ltc:: -? 5 tJ: -t' ~" 7 -'E-:/ * ffil.K Ji!,0 ~~I'i·m:-:?-c¥jF.!r~.t11t L c. ~ It~7.J'tJ: '-"0 @5}/r;l: L 17) r=r ~1~ 17)~~
K:f1~ k ~~I7)= *JC~

~ 1'f

C*'J 50 f:ill:) I7)mt H/rJtc.ml7) ~rn.fKJY,t'-"L*~ L LJ't!.1to-r -3 ib -3 J% -c I'i el" JliK jiX{j,j- ijj] 17) ~~ a: 50!. Q 7J >, 1tl!.17) JJHtC it> -? I'i '2 17) ~~-Cii,tJ: '-" L C ~;1'Il-:?tc 0 !1ln Cl'assat ellites mJ-c I'i*JmiI7) EI *~i:tfill 6 fill(!)el" 4~11):I7) t~*c. , jI-K::9t~I ~(2)tj!f.* 1 fflj:c. ~;f%t~ L, 1tl!.I7) J~K it>-:?L !'i

Glyci?neris,

Sunettinct, Cyclin a, Astal·te, Anomaloca1'CZia, Chione etc . . 17) 1 Jj ~~fill ~;jj;:

L1to ,!;J,I.li~!5i;!-li." Qf:ill::U&, 1rm f&~7J>t\lY-Cit> QiJ>, L7.J' L*tm:;?(17) L c. iJ>l§v- q.Ji}.-3 c. },!f,l~o
Crassatellites g~-cl'i c' I7)11H ,*rn.f 17) JliffUnJ]17)1tl!.K 9"JtTK l'i:lit~~' nJ] I7) ~~1.

~ ffi L L b -3 0 ;L~I7)~l7)f!'\~:i:iliI'iJL H'JHtI, L ,2.
(2)*fJHtl!. c. R£~J Ij/:f:l,3l~Q 0

Cl'as sate llit es mJ LI" -t' ~' 7 -'E- :/ * ffil tt vJ I'i 1k!fl ffJJ 17) ~~ I'i lffi;lt ~1li7CCEL:7<'0 6 *ill'N*®i.g:-:::.f;t 4 1"'(:'"'(:' <0 :::'0

1. C, jovealattos (Sow.) 2. C. namos (Ad. et. Rve. ) 3. C. j apani<.:us Dkr.
(= hetel'oglyptus Pils.)
4. C. (ulmns'i (Kobelt) 5. C. con'ugata (Ad. e t Rve.) 6.
C. sublamcliatus (Kobe It)(3) Crassatella sulcata "Solanc1er", Barton Bed, Eocene, PalaeontographicalSoc. Monogra ph XXI V, p. 170, Pl. 23, f. 11, 1870.
-

(

72

) -

640

~~.ooAllL L c:>:@:fiJl:-c1:l:<, :5NJ-U:. (J9'assatellites (tCjQ:ffg{1:I: AstM·t e(2 Wl:fil::~), .:&V' i: (7) jf-(tC Ano?naloca1'Cli(~ ( 1 Wl), Cyclina ( 1 t!fI),
Chione ( 1 fill) ~-Cfi t c9mtillH::Ji!. 1:I:0 04.

.

\fx:o :f:&@lOl;i-"C'1b ib .o lj<!f.5EO ~'ill~fi /i'I.l5EPJ'1m"C·iV .o0( L C) ~j:r.(tC JKt-c; fi/i'I.l5E(tC ~ ]? ~ :ttl <7J' 1b 9:117.1- tJ: 0 .0 . LiJ' L. 1l!!.)j~Pi· .o tf;f~)j( 1:I: 1fII¥:G!Hi ib .0 fl{l1lE8r7<J-c fi/i'I.l5EJ::. c:> Oritel'ion C. 1:1: .0 "" < , tf;!j(tC t'¥?*:h'i: Bor illg Oore 1:1: c' (tC f~ t, ,rt .0 --c 1b {ll ~ ~ .0 "" '@- 1b C:> iJ' c. ,Ii!!, lti 7.1-..0 0:jrm ~~]tC ;!t;. ]? flIJ ~x~~c; 'fjf-?ti: .:ZPW, lf1-W(7) W.i ~xrf,t;~fl!!. (tC -? 0 L~X-".. LT ~ -?tL;w'~ 1I-f1ffi\7/(:n; (tC}]j[:x.1~*~fj~]i!glQ-T ~ 7.1-·i1Xill<m!<;f.fjt ~ ~~~Vj .0

0

J . TmELE : Hand b. d. Syst. W eicbtiel'kunde, III, 1934, S. 845- 846.
U. S. GRANT, H . R. GALE : Pliocen e and Pleistocene Mollusca of O,t1ifOl'll ia, I,
1931, pp. 270- 2i1.
~ff:lf$!.%:~/4 j- A ,~mfR\%:

7"4 j- A , V (2,3 ), 1935, pp. 128- 129.

:1'1-

;f:EZ@:III (5), 1932, p. 207.

~1j:t4fi'i'I'I ;jf.'H'-lm iJf.:J( lll t.>, G nJtlll j- Q ~~ ~1fiIH1J1t15 1'C )j>;JL 'L

C~~ till" ,~llc4Jl:,

V I (12), 1935.
S. N OMURA cmJ';fJt2[~) :Oatalogue of tbe Tertiary and Quartery Mollusca fromtbe Island o~ Taiwan, 1. (Sci. Rep. T oboku Imp. Univ., II ser., XVI, 1933).
J. MARIYAlIIA C1i'it 11!~d~~) : Molluscan Fauna of tbe Lower Part of tbe Kakegawa
Series in tbe P r ovin ce of Totomi, Japan.

(Mem . Ool!. Sc i. Kyoto Imp. Un iv.

Eel', B, III (1), 1927).
M. YOROYAlIIA (t"'li uIX *Jl!IO : Pliocene Shells fr om TOllohama, Tosa. (Imp. GeoJ.
Surv . Jap. Rep. No. 104, 1929).
H . G. BRm.TN:

Klassen u. Orclnungen d. Tier-Reicbe, III, 1931.
-(

73 ) -

V ol. 43, PI. 3L1 (9)

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;W( ~r Tm

e . .iajJuuica ])KB. ") ;f!l~~r f(ii (1 - 3 JJVI'lill
iJt. !k. IJlit' 1t ljR¥!;>j~x 60)

-t 'f5 -'C ;/*~ CraSJaleZiitesjot'eolattls (Sow.) C')\tx Q) H~ :iE ~c )i,i(L641

On the Shell Structure of Cm ssatellites joveolat'l..Ls (Sow).

By

K einosuke TAN
Sllrface of t,he s bell of Cmssaielrites Juveolatus (Sow.) is ornltmentecl o nly wit.h
concentric ribs; beneath this surface layer. ther e is a layer which is c haracterized
by radial ribs.

The existence of this re m a rkable feature has been found r ecently

in the course of studies with the recent a nd fos sil speciuJens colle cted in a ndaround Taiwan, as is shown by th e figures 5, 6 and 7 on the flnnexerl plate.
'When the surface, concentrically ribbed lay er is worn off, it g ives rise t o a featureshown by fig. 4 looking as if to belong to a differe n t spec ies.
On examining under the m i cro~cope, thin sections, both t,r a nsve rse andlongitudinal, of this and many other kindre d species, the author h as become
confirmed of the fact that some of the she lls with cre nul a t ecl internal marginl,ave a sub-surficial, radially ribbed layer, although ill n o other case the featurellas been FO conspicuous as in the species nnd er cons ider ation.
'W ithin certain limits, such a pecul iar featUre of shells may play a n impor 1a nt part ill the specific or e ven generic identification among p elecypods.

ExplaIlatioIl of Plate 34 (9)Fig. 1. Longitudinal section of C. Jowulattls (Sow. )Fig. 2 . . Transverse section of the same.
Fig. il.

Transve rse section of C. .ia.ponicct DKH.

Fig. 1-il

Recent specimens. x 60.

Fig. 4-6

Foss il s pe cimens e ject ed from the mud-volcanoes
Tai wan.

-

(

74

) -

near Taka o,

64 2

. 19.

A New Roe-deer, Capreolus (Capreolina)
mayai, n. subgen. and n. sp. fromthe Inland Sea of Japan.
By
SHIGEYASU TOKUNAGA

and FUYUJI TAKAI[Rea.d June 13th., 1935 ; received July 6th., 1936J

During the past half century Mr. Ukiti MAYA, a resident of
the city of Takamatu, h as been collecting mam malian fo ssils fromthe I nland Sea of Japan . Last year he contributed his entire
private collection to the Fac~l lty of Science and ~ngine('ring,"\Vaseda University, Tokyo. Upon examining these fossils now
preserved at vVaseda University, we found two specimens of apeculiar cel'vid which in our opinion belong to the genus Cap?'eoltLS. The living species of Cap?'eOltLS consist of the following
three, namely, C. WP?'W GRAY, C. bedjQ?'di THOMAS, and C. pyga?'gtLS (PALLAS). Of these C. bedjo?'Cli and C. pygcwgU8 now live inNorthern China, Manchuria, and Korea. The prim.itive Roe-deers,
P?'ocap?'eOltLS latijrons SCHLOS':ER and P. l·tdmeye?'i SCHLOSSER,
were found amongst the Hippa-rion Fauna of China.(I) This r eportdeals with the first occurrence of the genus Cnp?'eoltLs in Japan
Proper, living or exti.nct.
Genus Cn]J1'eol'l,f,8 HAMILTON-SMITH, 1827,

Subgenus CnjJ?'eolinct TOK UN AGA. and TAKAI, n. subgen.
Antler comp arativ~ly l arge, simple, rising together and almos t vertically from the crown of the head and forming a si ngle dichotomous fork.
The first t ine, which d evelops from th~ anterio t' su rface of the antler ata point more tha n one-tbi rd of the total length, curves upward, making
an angle of 70°-75° with the beam . The beam curves anteriorly, while
it , top indicates an antero-inner di~'C( tio!!. The burr i s prominent and(1) M. SCHLOSSER, Tertiary Vertebrates from Mongolia. Palaeontologia Sinica,
Ser. C, Vol. I, Fas. 1, 1924.
O. ZDANSKY, Fossile Hirsc be Cbina. Palaeontologia Sillica, Ser. C, Vol.
II, Fas. 3, 1924.

-( 75)-

A .New Roe-deer, Capreolus (Capreolina) mayai, n. subgen. and n. sp. 643
circular. At the part just below the first tine, the fore- and aft diameteris larger than the side-io-side on'e, its cross section being somewhat elliptical in ,shape. Although , at the middle of the beam the section issubtriang'ular, near 'the top it becomes elliptical again . There are seveml
series of longitudinal irregular nodules on the inner slll'face of the a ntler.
Some of the nodules become la r ger and form tinelets .

Upon comparing the present antlers with those of a Jiving
Roe-deer, it was found that the present ones are intimately related
to those of the Hippocarnel168 group, and should be included in
the Cap1'eol168 group. Judging from their size, bifurcation, andsurface ornamentation, Cctp1'eolina somewhat resembles IIippo carneli68, a South American Guemal. But on account of the angleof bifurcation and of the curvature of beam, Cap?'eolina differsfrom Hipp0Garnel168. Compared with P1'ocap1'eol168 and the frequently described Cap1'eo l168, Cap1'eolinc6 has larger, mor e rugose,and single dichotomously forking antler. The second tine does
not develop, but in Cervidae can often be seen several deformatiesof antlers and degeneration of tin es that are du e to abnormality
and to in juries to the organs. Our opinion therefore is that theloss of the second tine in Cap1·eolina .is due to these reasons.
Since the surface ornamentatiOll of Cap?'eolina is 'more pronounced
than that of t he typical Cap?'eol168, we regard Cap?'eolina as asubgenus of Cap?'eol168 and believe that phylogenetically, Cap1'eolina
stand between Cap1'eOl168 and H 'ippocarnel'l.68.

Cap-reol'us (Cc6pTeolina) 1nayai T OKUNAGA and TAKAI, n. sp.
J11ate1'ial :-A rig ht ant ler from the bottom of the sea, northeast off
Kotuti-Zim a, Kagawa prefectlu 'e, and a left antler from the sea bottom
off Sirahama, Sy odosima, in the same prefecture. Both specimens a:'e
~ ow preserved at the Faculty of Scien ce and Engineering', Waseda Un iversity, T okyo .
De8c1'iption :-The right antler (PI. 35 (10), fig. 1) is r a ther large
and dichotomously forking. The ped icle is believed to be rather short.
The burl' is vel'y prominent and rounded. The first tine, which is damaged, branches a t a point 110mm above the bu1'1' and at an angle of::-bout 70° w ith the b eam, cur ving upwards. The beam curves stron gly,
first outwarrl, then backward, and fin ally sharply forward and slightly
inward . . Tl':JnsveI'se sections are shown in Text-figure 1. · Several series oflongitudin al il'l'egular nodules are recognized on its surface; although the-( 76 ) -644

S. l \Jfa; :\AGA and F. TAKAl

cr
· ··0
Text-fig. 1. Right antler.

x 1/5

Text-fig. 2. Left antler.

x 1/4

outer surface is rather smooth. Somewhat large tinclets issue from theantero-inner and postero-outer 8Ul·face.
The left one (PI. 35 (10), fig. 2) is rather large and also dichotomously
forked like the right one. The first tine, which is almost dam<lged, issues
from the beam at a point · 105mm above the burr, makin g an angle ofabout 75° with the beam. Transverse sections are shown in T ext-figure
2. A keel runs on the outer surface, which is smoo~her than the rightRurface. Two tinelets are present on its posterior upper surface.

Dimensions : Right
L eftantlerantlerFore-anc1-aft c1iameter of pec1icle just below turr · . . 52.0mm 42.0mm
42.0 II
Side-to-sic1e c1iameter of pec1icle just below burr . . 51.0 1/
Fore-anc1-aft c1iameter of burr .............. . . . . 73 .0 II
59.5 II
Sic1e-to-sic1e diameter of burl' . . .. . ..... . ... . ... . . 70.0 II
52.5 II
Fore-anc1-aft c1iameter of beam just above burr . . 47.5 II
43.0 II
Sic1e-to-side c1iameter of beam just above burr · .. . 44.0 II
43.0 II
Fore-anc1-aft c1iameter of first tine at its base .. . . 41.5 1/
49.0 II
Sic1e-to-side diameter of first tine at its base · ·· . . . 39.0 II
30.0 IIDistance from burr to first tine· . ...... .. . .. . . . . . 150.0 1/ 122.0 II
Fore-anc1-aft diameter of beam just above first tine· . 44.0 1/
40 .0 II- = .. ( 77)- -A New Roe-deer, Capreolus (Caprco! ina) mayai, n. subgen. and n. sp. 645
Side-to-side diameter of beam just above first tine 47.0 mm 34.0 mm
31.0 II
Fore-and-aft diameter of beam at its middle part · . 30.0 II
Side-to-side diameter of beam at it" middle part · · 4G.0 1/
34.5 II
Total length in straight l ine ii'om burr to top . . 380.0 II 3~ 0 :'0 II

Horizon: - Probably Pleistocene.
Rerna?'lcs :-Compared with the Pontian P?'ocapreol1LS, P. latif?'ons and P. ?'v,trneY~?'i, the present species differs ent:l~ely fromit in its surface ornamentation, the size of the first tine, and theangle of the first bifurcation. In the Korean Roe-deer, Capreolus
bedfQ?'di, including the Manchurian C. rnantch1L?'i c1~S, the firstbifurcation occurs at the middle part of the total length, wherfl
as in the present f>pecies the first tine issues fr .lm the beam ata point more than one-third the total length from the burr, while
no second bifurcation can be recognized. Several sories of strong
longitudinal irregular nodules d istinguish th e pr<':-.ent fpecies from
C. bedfordi and ·C. pyga?·g1~s.
Bachofen-Echt has recorded the occurrence of Cap?'eol'us cap ?'eol'L~s from the Pleistocene deposits of Wurtemberg, GermanyY )Judging m erely from its figures, it greatly resembles the present
specimens in the somewhat large tinelets and the many series ofstrong longitudinal irregular nodules.
.
The new specific Dame is g iven in honour of Mr. U. MAYA
who collected a large number of fossil specimeM, including thosehere described, from the I nland :3ea of Japan.
Finally we take this opportunity of expressing our h eartiest
thanks to . Messrs. U. MAYA and N. NAORA for much valuable
information.

Cap?'eolllS (Cap?'eolina)rnayai UCJM; v> -C

Giid~)?frrllliJre\ Capj'colina ,') 11J ft J:ti\(:( (I~ :\:jC;! <, - ?J( H11I.s,o 1f~-1'!W: if,J Bi~ ".> 1:1f;i~ 1/3 Cl)fYi-f.» b7.rIl!ld- 00Capreollls @\K!/'Hf t..: ~~ .::.::f1[ i- jlj/tv' -C J;;) Q 'h: J1;[;I:J::il&ft:.;: iii Q b II) C '3iJ'--b~Qo~~ft~*K-Ck< • • L~mft~~Kg ~ ~ ~ ~o ~* 0 **K~-c EW.illI~

iiJJfH . ¥ i' Q 'h'~vl~K 3li-:5 <.";:-1ftV'NVl1~f;IBHfU: t..: Q0

rlq Oli]K:)'&{lti 0 f;.6'Uco/eihlYlj ,:!:, I;J 0 ~k(1) Frh . Ad. BAClIOFE:>'!-EcFIT, Das V'el'kommen von Cetpj'colous im Plistozfin
Wlil'ttembergs. Palaeontolo:;(Eche ZeitschriH, Bd.. 13, 1931.
-(

70

) .-

S, TOKUNAG .I and F. TAKA!

646!lk~ECD<b~ ~if.)v;):*~< tf. ~/HJ(~:&":::n:J.;Joo Cctp7'colus (Capr colina ) maywi i-tl~:<1;:~.ill!:"n) o

B'UtBl!:CDjfJ t It!l\:;: L Capl'colina llli J~ ;b{ Iiippocameius }gjiK jH'&t.z: iMtlf~Hc <b .0 4;jl:i- 9:[\ .0 0L...)j> L...~t-rJ(/.)7}lttf~.2kZfW~1' ''~ R ~ 7JK!i{'l: :&~;b{iITI!,1b b ~'L .0 0 Capl'col'ina llli}gjiv;): '$.::~blil~ v '-CJ.;J.o;bn"f;J: ~Capl'coiu< }gjiKJ~-3"o ~CD UGI,f;J:.j'L.o o AAi::j\f"'.,)nnCD:&~1,f;J:~t.::~i-i~ <;;:J1:, ~-RCD7}lttM:lli.2kZf£ZTffi Cl) !JXjlk1!;~ i@~Jj~K J: .0 0

Cal l'colina llli~f;J:t~~:(19 tf. Cavcolus J~ t Hippocamcius ~ ~tffZf'? VT .0 ~ CD t ,[I, v;):,Viirtemberg (/~ TgjIJJni\Ji>BI: J: ~ 'Wt!f ~ .j'L tc. Capl'eolus cap1'eolus.j'L .0 c~ii51:t F' -1 ';I C1)

LINNE

f;J:**illK)[[ "'='Iii" t ,[I, fj:.j'L Q 0

Explanation of Plate 35 (10)Capl'colus (Cap1'eolina) maya·i TOKUNAGA and TAKAI.
Fig, b, Antero.. outel' view of right antler, x t.

Fig. lb. Inner view of same. x}.
Fig. 2a. Inner view of leg antler. x!,-,Fig. 2b. Alltero"outer vie w of same. x t.

-(

78) -

20. Molluscan Fossils from the Raised Beach
Deposit of Takai, Tateyama-Hozyo-mati,
Tiba Prefecture(Studies on the Fossil Mollusca of th e Boso
Peninsula. No.1)
By
KOITI SUZUKI and KENICHI ICHIMURA(Geological In stitut e, Faculty of Science, Imperial University of T okyo)[Head June 13 b., 1036; r eceived July 6tb., ]036J

One of the present writers (IcHIMuRA), while surveying thO'
geology of the southern part of the Bosi'> Peninsula in 1934, hasmade a large collection of fossil sh ells from the raised beach deposit of Tak ai, Tateyama-I-I6zy6-mati, exposed along cliffs on bothsides of River Tab. The shells are excellently preserved and eventhe . colour patterns are retained in man y of them, thorlgh moreor less faded. The -num ber of the species determined is attained
to sixty-four in total, which are distri buted in twenty-eight speciesof Bivalvia, ono of Scaphopoda, and thirty-five of Gast ropoda, aslisted below;Bivalvia
1.
2.
3.
4.
5.
6.
7.
8.

Numtlana confusc! (IIANI,EY), 1860.
Rare.
Barbatia (TI··i gonodesma) yokoyamai (NO:afURA ), 1933. Rare.
Anadaw (Scaphar ca) infiata (REEVE), 1844 .
Not rare.
ChZamys (Ch lajnys) nobilis (REEVE), 1852.
R are.
Pecten (Pecten) laqueatus SOWERBY, 1842.
Common.
Ostrea (O stl'ea) denselamellosa L ISCHKE, 1869.
Common.
Ostl' ea (Loph a) r osacea DESHAYE S, 1836.
Not rare.
Ostl'ea (Lopha) imbl'icata LAMARCK, 1819.
R are.
- - ( 80' ) -Molluscan F ossils from the Rai ~e d Beach Deposit of Takai

711
9.
*10.
11.

12.
*]3.
14.
*15.
16.
17.
*" 18.
*19 .
20.
21.
22.
"':23.
"'24.
*25.
*26.
*27.
28.

N ot r a r e .
Ost rea (C rasso t1'ea) gigas THUNBERG, 1793.
Rare.
L ttcinct (Anodontia I binlata (PILSBRY), 1895.
Rare.
Coelctl.?ia (P.illu cina) lJisicli'l£1n (DUNKER), 1860.
Cardium (Pa1Jy'r iclea ) mttticum REEVE, ] 843.
Not rare.
Dosinia (Do sine lln) ang?llo sa (PHILIPPI), 1847.
Abundant.
V emts (Chion e) m icm (PILSBRY), 1904.
N ot rare .
V enus (Cldttsinella) t·i H·Ct DILLWYN , 1817.
Rare.
Paphia (Paphia) ettglypta (PHILIPPI ), 18:17.
Common.
P ctphia (Paratctp es ) unclu,lata (BORN ), 1778.
Not rare.
Clem entia v atheleti lVlABILLE, 1901.
Not rare.
Zo zia abb1'eviata (GOULD), 1861, val'.
Common .
Soleclwtus clivcl1'icat us (LISCHlCE), 1869.
Rare.
Macoma (PseZlclometis) p1'ae1'u pta SALISBURY . 1934.
Rare .
Ma cMlul (Ma coma) tokyoensis MAKIYAMA, 1927.
R a re.
Mac oma (Mac o1J),a) p1'aetexta (MARTENS) , 1865.
R are.
M acoma (Psam7nacoma) can-ricla (LL\MARCK), 1819.
Rare.
Ma coma (P samm acoma ) vestal-ioicles (YOKOYAnfA), 1920. Rare.
lJln coma (Psamnw coma) a'Wa.jien sis (S OWERBY) , 1914.
Rar e .
l' ellin t (Fabulina ) n it-idnla D UNK lm, 1850.
Rare.
S olen go uleli CO NRAD, 1857.
Rare.

Scapbopoda*2J.

Dentalittm (D en ta li l ln~ ) octangulat'u m DO NOVAN, 1803. Abundant.

Gastropoda
30.
31.

32.
*33.
34.
35.
36.
37.
38.
39 .
40.
41.
. 42.
43.
44.
. 45.

L en~intina imb1'icata (DUNKER), 1860.
Rar e .
Batilla1'ict multifonnis (LISCHKE), 1869.
Rare.
Ce1'ithiuom (P1'o clava l p f e!fe1'i (DUNKER), 1877.
Abulldan·t.
CM'ithi um (P1' oclava) kochi PHILIPPI, 1875.
Hare.
G01l1'm y a (Contumax ) kobelti (DUNKER), 1864.
R are.
E pitonillm (L-ineoscala ~) yo,"oyamai n. sp.
R are.
E pitonill1n sp.
R are.
Leu cotina (A ctaeo pymmis) exi mia, (LISCHKE ). 1874. Common.
Diala picta A. P.J)A1fS, 186 L
Rar e.
Oclost omia hi lgenclol'fi CLESSIN, 1900.
R are.
Oclost omia shimosensis YOKOYAMA, 1922.
Rare .
l" lwbonilla dunke1'i CLESSIN, 1900.
Rar e .
l'u1'bonilla app1'oximata DALL and BARTSCH, 1906.
Rare.
T w-bonilla multigymta DUNKER, 1860.
R a r e.
Amttt i!-ina t1'ic a1'inata (LINNAEUS), 176'7.
Rare .
C1' ep'i cll!la (SypholJat ella) walshii ·(HERMANSON) REEVE, 1859.

46 . St1'ombus (Cana1"ium) j apon·icus REEVE, 185L-

( 81 ) -Rar e.
Not rare.

K . SUZUKI and K. IcamUiu
47.
';'48 .
49.

50.
51 .

712

St 10 Inbus (CctnaTiun~) succinctu s LINNE, 1768.
Rare.
Polinices (N eVC1'ita) diclyma ("BOLTEN" ReiDING), 1798. Abundant.
Sinltrn (Eunaticina) papillll"ln (GJlmLIN), 179].
Rare.
l'onna luteost01nCL (KUSTER), 1857 .
Not rare.
Rare .
Rapana tho"lnctsiana CROSSE, 186l.

Rare.
PY1'ene (JJ!Iit1'ella) 1Ja?'ians (DUNKER), 1860.
Common.
Babylonia .iaponicct (REEVE) . 1842.
Not rare.
Nassa1'iu,s (Hinia) festi vus (POWIS), If'3.5.
Rare.
55. N assa?'ius (l'?'itonella) jnponiC1ls (A. ADAlVISi, 1851.
Abundant.
*56. /I'assarius (Niotha) lives rens (PHILIPPI), 1848.
Rare.
57. Olivella consob ?'ina LISCHKE, :I 871.
·Rare.
58. Cancella?'ia (1l1 e?'icct) laticosta L OBBgcKE, 1881.
*59 . Cancella?'ia (l\' a?'ona) spen,q leriana DFSHAygS, 1830. Abunda nt.
60 . Ca71cella?'ia (Solatia) noclttlif era SOWERBY, 1825.
Rar e.
61. Clavat~tla consi"lnilis (SlVIITH), 1879.
Common.
62 . l'e?'ebra (StTiote1' eb1'tlm) lischkeana DUNKgR, 1882.
Rare.
63. l'erebTa (St?'iote1'eb?'um) bathY?'ap he SMITH, 1875.
Rare.
64. Hingichw (Ringi w lella) (H' ctata G OULD. 1861.
~ ot 1'<ne.
52.
"53.
54.

All th e species r eported by S. NOMUK\ 1)f1'o])] the same placea few years ago are also contained in thi s collection. They aro
marked with asterisks in the above list. Ba?'batia yokoyamai., Chlamys nobilis, Epitonittm yokoyetmeti, Dietlct pictet, Odo8tomict shimosensis, St?'Omb1tS sttCCinct1tS, Cetnce llcwiet nodulife?'Ct, Clwuetttdct
consim,ilis and Ringicttlet et?'ctatct have not hitherto been known
from any raised beach deposits of the K wanto District. D'ialct picta
and St?'om!ms s1tccinct1tS are the first ones found as fossils in Japan.
Looking over the above list, onO can recognize that this fauna
is composed in main of the species characteristic of the Japanese
Kurosio fauna, that it contains no d emont typical of the O,)'asio
fauna, and that it is most closely allied to tho recent molluscan
fauna of the Pacific coast between Basyil a11<l Kii. Several speciosof the fauna have wide distributions in the subtropical and tropical seas fr0111_ the Malay Archipelago to Japan. Venus tim'a , Zo z'ict
abb?'eviettct, Sinnm papill1tm, J.VasSa?:·ills livG"fcens and Rtngicidet et?'Ctetta are sucl~ examples. Therefore, it m3,y be conclud ed that tho
temporature of the wator indicated by this fauna approx-i mates to,or is slightly warmer than, that of Tatryama Bay of to~c1ay, ' but'
(1) Sitihei J'ro~fURA: «·Mollusca. frOID .the~ Raised Beacb Deposits of ,t he K~v.an­
to Region," Sci. Rep. T6hoku Imp, Univ., se l'.: 2, .vo!. 15, . 1932, · no: ,2, ' pp, , 65, (IF.'141 (77).
,_i0\- - «( 82 : ) -

-

( .

713

Mollusca.n F oss ils from th e Ra ised Beach Deposit of Takai

by no means warmer tllan that of the present Kii coast..
This faunal aspect is q uite similar to that of the raised beachdeposit of Z6siki(l), about 1 km . north of Tak ai, as well as to thatof the so-called" coral- bed of Awa(2) " developed along the souther ncoast. of Tateyama Bay. But it is more or less d istinct fro m thatof the so-called " 'warm-sea deposit" of Kokubu(:l), about 1.5 km. eastof Takai, and from those of the raised beach deposits at Simohuziwa ra(4), Nagaok a(4), Tikura, Seto(4), Titose(") and others locatedon the Pacific side of tho peninsul a.
According to th e I CIlIlIIURA'S fi eld obser vation, the raised beachdeposit of Takai can be correlated to those of Z6siki, Tikura andSeto, but it is a litt le younger than the (, warm-sea deposit" of
Kokubu. H e h as observed also that both sets of the deposits are
set on the " coral- bed of Awa " with a distin ct u ncomform ity between . As a result, the stratigraphical relation among the r aisedbeach deposits of the southern part of the B6so P eninsu la is t a bulated below :,R aisedShell-Beds ofT akai, Z6siki, Tikura, Set o and Ot hers

Beach

Shell-Bed of K ol,ubu

Depos its

"Coral-Bed of Awa"
(Sbe ll-Beds of Numa, K 6, K asana, etc.)

H o ~ oce n eP]iocen eMiocene

Basement:

Com plex

The writers wish to express th eir hear ty thanks to Dr. Teiichi
KOBAYASIlI for his kind advices during the preparation of thismanuscript and to Mr. Tok u bei K URODA for his great assistancein some of the identifications and for the loan of tome r ecent specimens of Diala picta. Thanks of the writers are also due to Mr.
(1) S. NOMURA: Op. c'i t.
(2) M, Y OKOYAMA: "Mollusca from 1he Coral-B ed of Awa ", J our. CoIL Sci.,
Imp. Univ. T okyo, vol. 45, art, 1, 1924,
S. NOMURA : Op, cit.
(3) S. SAUEK!: "Warm Sea Deposits of Tateno-mura, A wa ", J onr. Geol. Soc.
Tokyo, vol. 36', 1929" DO, 434, p, 502,
(4) S.' NOMURA: Op, cit.

-

( 83 ) - -K. SUZUKI and K. I Clli~IURA

714

C. VEKI for photographiDg.

Descriptions of Interesting Species
1i1. Venns (Chione) micra (PILSBRY)
PI. 40 (12), figs. 2-5

r enus cren"(fem A. ADAi\(s (not SOWERIlY), Ann . Ma.g. Nat. Hist., ser. 4,
vol. 2, p . 230.
?1882. Chione c1'cnifem DUNKER (not SOWERllY), Ind. Moll. Mar. Japonici, p . 197.
1904. Ch'ione mic1'a PILSllRY, Proc. Acad. Nat. 8ci . Philadelphia, vol. 56, p. 552,
pI. 41, fig. 45.
1927. Chione crcnifcm YOKOYAi\(A (no(, SOWERIlY), JOllr. Fac. Sci., Imp. Univ.
Tokyo, sect. 2, vol . 1, pt. 10, p. 456, pl. 52, figs. g, 10.
1932. Chione (Timocleal c1'enife1'o'icles NOMURA, Sci. Rep. T6hoku Imp. Univ.,
ser. 2, vol. 15, no. 2, p. 83 (19).
FOUl" left valves and one right valve were collected .
Living :-B6syu to KyusyiL11869.

This species closely resembles Anomcdo cCL1"dia sqlwm08Ct (LINNE)
and even it is not improbable that the former merely r epresents
an immature stage of the latter.
Out of YOKOYAMA'S Chione c?'en~fe?'a from the shell-beds of
Itikawa, NOMURA has established a new species, Chione ('Pimocl ea)
c?'enije?'oide3. In comparison with tho type specimens of Chione
mic?'a PILSBRY, the specimens of c?'enife?'oicles illustrated by YOKOYAMA have certainly a less quadrated outline with a more strongly
protruded posterior end and more nmnerous and finer radial ribs.
But, among the YOKOYAMA'S collection from. the same locality,
there are some specimens almost identical with the types of P rLSBRY'S species, and the two forms are united into a continuous
morphological series by many intermediate ones. Ther efor e, it may
be understood that C. mic?'a is tolerably variable in the outline andsurface sculpture and C. c?'en~fe?'oicles might be no , more than avariant within this species. The continuous variation from C.
?n'ic?'a to C. c?'enijeroicles can also be seen among a number of ther ecent specimens procured from Sagami Bay and k ept in our Institute collection (PI. L10 (12 ), figs. 2-4).
Chione c?'enije'l'a described by A. ADAMS from the Inland Sea
of Japan (Setouti) may possibly belong to this species.
Incidentally, Chione minclanensis YOKOYAMA (not SMl'l'H) fromthe Vpper Musashino Formation of Semata, Tiba prefecture, ap- -

(

84

) _.-

715

Molluscan F ossils fr om jLe Raised Beach Deposit of Takai

inparently r esembles thil:i species, but they 'are differ ent
th e b ln ege nature and surf~1~e sculpLure. and from which it is su ggested
that the former may be an il'rnnature form of a certain species of
the genus P?'otothaca, probably of P. jedoensis (LTSCHKE) ,19. ZOZiC6 abb?'eviata (GOULD) val'.
PL 39 (11), figs. J 0-}8
Of 1St)! . Solen ctbb1'e?;iatus GOULD. Proc. Boston Soc. Nat . Rist., vol. S, p. 26.
Of . .IS6l. .t!zO?' minutus DUNKER, Proc. Zool. Soc. Londo n, p. 425.
Of. I SG;l, S olen abMe'viatu s GO ULD, O:.ia Concll ., p. 164.
Of. IS74. Solecurt·us a bb1'eviat'US SOWERBY, Conch. Icoli., vol. 19, Soleem 'lus sp.
6, pl. 2, figs. 6a, b.
Cf. 1874. Soleew·tus m inutus SOWERBY, I/)id ., S olecw ·tus sp. 11 , p1. S, fig. 11.
Cf. 1888. S oleeurtus abb1'e?;i ,tu.~ C LE SS I ~, Conch. Cab., vo l. 11, pt. S, Soienaceen,p. 9S, pl. 22, fig . S.
Cf. 1888. Soleemtus minatus CLESSIN, I bid. , p. 94, p1. 24, fig. 4.
Cf. 19JO. S oleew'tus abbreviat?.ls YOKOYAMA, J onr. ColI. Sci., Imp Univ. Tokyo,
Yol. S9, art. 6, p. Ill, pI. 7, figs. 12, I S.
Cf~ 1928. Soleew'tus abb1'cvicttus YOKOY,IMA, Imp. Geol. Sm·v. J apa n, R ep. no.
101, p. ]24, pl. 19, fig . ] 2.
19S2. Pi a?nmosolen abiJreviutus NO~ [ UJ~A, Sei. Rep. Tohokn I rnp. Dni v., sel'.
2, vo l. 15, no.. 2, p . 90 (26', (parts).
Shell r elatively small, thin, t ransversely oblong, slightly renif orm, morethan twice as long as high, compressed, in equilat er a l. Beaks situat ed a t
about the anterior t wo-fif ths, contig'uous, small, low, incurved and turned
backward. Dorsal m argin nearly straight, being the arching very slig ht;
antero-dorsal very slowly descending, a trifle convex; anterior end r egul arly rounded; ventral margin almost st raight, fe ebly ex cavated in the
middle, and strongly ar cuat e up to neighbouring mar g ins; p osterior end
obliquely sub-truncat ed, makin g a sharply rounded corner wit h the ventral border; postcro-dorsal mar g in straight, scarcely descendin g . Sur fac econcentrically marked with il'l'egular incr emental striae and provided withan indistinct groove running' obliquely from the umbone to the p osterior
ventral side across the middle of the shell in a ddition to some ver y obsolete radiating ribs and ful'l'ows ; median radial g ro ove rather r apidly wi dening, 'and slightly or ofte u even hardly depressed fro m t he geneal surf a ce, its pos t erior boundary mOl'e or less distinctly m arked by a fine fur ro w, but its a nterior border obsoleted an d sometimes s carcely discernible.
Interior of the shell with an in distinct, b r oad, but sl ightly eleva ted medianradial r idg e, which is corresp onding to the exter n al groove a nd obsoletely
bounder ed by t wo furrows, besides many fine an d faint radiating lines .
Muscular impressions distinct but r at her small, more 01' less irregularly
ovate, th e posterior one broader than the anterior. Pallial sinus tolerablylarge and b'road, round or rOllDc1fy quadrated, deep, approaching the me- - ( 85 ) - -K. SUZUKI and K. ICHIMURA
dian radial e1evation but not extending beyo nd it. Right valve wi~h two
small, short, comparatively strong teeth, of which . the posterior O)1e is
obliquely directed backward; left valve with one small but strong to?th .
.
Several right and thr ee left valves were collect ed.
Diving :- J apan (exact locality unknown). (Zoz·i a ab br ev iala : B6syft tol~yukyu , .Japan S ea, Taiwan (Formosa). China Sea, Philippin e's , Malay,
Netherlands East Indi~s J M:alacca.)

Zozia abb?'eviata and it" a llief; l'xhib it certain amounts of variation in outline and sculpture. Hec-e ntly, B. PRASHAD(l lhas ascertaind that lJ!Iacha sheepmaclce?'i DUNKER 1852, So len cLbb?'eviatus
GOULD 1861, Azo?' oblongus DUNKER 1861, Azo?' solidus DUNKER
1861 (noll GRAY) and lVovactdinaandamanensis PRESTO:'-< 1908 are
all synonyms of ZOZiCL co(t?'ctatcL (GiliELIN) 1790Yl
The fo ssil shell from Takai is easily distinguishable from thetypical form of Z ozia abb?'eviata in its sli ghtly more slender andevidently more inequilateral sh ell with a sub-triaDgularly protruded posterior end and a more obsolete aDd oblique medial groove ,and its pallial sinus which is not extended beyond the medianradial ridge. The proportion of the height to the length of theshell, the position of the beaks and the strength of the m edianradial groove are, however, variable to some extent in Zozia coarctatcL, Z. abb?'eviata and the fo ssil form of Takai in each (seeTable). Z. coarctata illustrated by FORBES and HANLEy C"lifi, for example, closely akin to the typical form of Z. abbreviata in its general outline, while the specimens illustrated by SOWERBy(·lland M.
HORNEs c5l are similar to some fo ssil specimens of Z. abbTeviata from
Naganuma and Tumuki and also to the fo ssil form from Taka i inrngard to the somewhat more slender and inequilateral sh ell. Sinceth.ere is no specimen of Z. coarctcLta in our collection, this speciee
may now be put outside of the discussion. The typical form ofZ. abb?'eviata appears to be linked to th e fossil form from Takai
without any distinct gap. The collections of fo ssil sh ells from the(1) B. PH ,~SHAD:
Siboga Expert., monograph 53c, 1932, p. 31 1.
(2) Solen com'ctatus G~!ELI" in LINNAE US, Syst. Nat,., erl. 13, 1790, p. 3227.
(3) So/e curtm coa7'ctatus FORnES & HANLEY, Brit,ish Mollusca, 1853, vol. 1, p.
259, vol. 4, pI. 15, fig. 3.
(4) Solecw'lus com'ctatus SOWERBY, Conch. I con., vol. 19, 1874, So7ecu'l'tus sp. 8,

pI. 2, fig. 8.
(5) Psarmnosolen coarctatus M. I-I oRNES, Die Fossilen Mnlluske n des TertiaerBeckens von "'Vien, 1856, 'vol. 3, p. 21, vol. 4·, pl. J, fi g. IS.

- ( 86)-

717

Molluscan Fossils from the Raised Beach Deposit of Takai~aganuma(Pliocene) and Tumuki (Holocene) beds contaius suchintermediate forms, a few specimens (PI. 39 (11), figs. 6-8) of which'are very closely allied to the form from Takai, beside,' many specimens of typical abb?'eviata (PI. 39 (11), figs. 9, 9a; YOKOYAMA,
1920, pI. 7, figs. 12, 13; YOKOYAMA, 1928, pl. 19, fig. 12). Therefore, the fossil shell from. Takai may securely be understood as anextremity of the individual variation, or at most as a subspecies,of Z. abb?·cviata. I~ our I nstitute collection of J apanese r ecent
Mollusca. there is found a single right valve (PI. 39 (11), fig. 10)
from an unknown locality which is almost indistinguishable fromthe fossil from Takai.
Z ozia mimda (DUNKER), living now in the Philippines, canhardly be distinguished from a certain immature form of Z. abb1'cviata (PI. 39 (11), figs. 7, 8) from the Tumuki sh ell-beds. Further, it is also very similar to the fo ssil from Takai in the external feature, but its size is smaller and its posterior end is rather
r egularly rounded. The poor illustrations and brief descriptionsof Z. min'Ltta by D UNKER, SOWERBY and CLESSIN are insufficiellt
for accurate comparison. Unless DUNKER'S specimen is actuallystudied, it can hardly be d cided whether his species r epresents
an immature stage of Z . abb?'cvicita or not.
The dimensions of some individuals of Zo zia abb?'cviata andits allies are listed below :,
0;

.n

'"
'0
'"P<
U1
OJ

I>,

;<;:;
~
OJ
0

H

E

'"

::::l

(!)

E

'0

'"PU1
Malacca(Recent)

..

~

>

'0

~
~

SOWERBY)

I ~~
.n ~

a=

::::l en>:l""'(!) ....;

~o..
.~D ~

r.;o

.-

S

~

..c:

~

E

r.

c::

.S

1'<..0
~/lI)

+'

(!)

E

...

..c:
~D

§

.n
~
':;:;

H

;r::

40.0

19.0

rn
rn

c::

-"l

.S::

'bh+,

"'
(!)

(!)(!)~...::t ~
o ~ 0

~.S ~

:E:s.5~'@

A. O' ~ +' ac s:;0..0OQ}~ .... -

+'Q)

p::<

-

2.11

_0
<.>

-0 3 o~ t.~'ii5
~.8
..,
Q

.n
E-i

en

.S
:..

w

~

:r;

1.17

°o
:;;i
..p ~

.:

0:::

-

---- - -- - - -

----

I

left

2,2a

43.2

21.2

6.0

2.04

1.34

2

right

],la

432

21.0

6.0

2.06

l.S4

13.9

<J

II

4

38.4

19.0

4.8

2.02

1.34

]2.5

4

1/

3,3a

36.8

]8.6

4.6

1.98

1.30

12.5

5

5,5a

34.4

17.1

4.9

2.0l 1.29 14.2
- - - - - - - - - - - -I ~left
43.0 20.3
5.5
2.12 1.35 12.8

Coast of

...
.c

Bosyn

.,

<:l

(Recent)

..c

".;j

RllJlvE'sspecimen (after J"ig ht

<:l

.~

(!)

:.-

kf 552aII-( 87)-

13.9

718

K. SUZUKI nnu K . ICllBWRA

....

""S

..0
rn

""

'0

w""

0.

»

':::"

:::

~

~

<.>
0

H

""8

'8

""
~

~

CJ~
..0"";

8-

~

,"0>

>=I"'"'0"" ....

S

S
0

:::i

...,

....
.S

S

en

rn

"

"" ..,
S 1..0.... "" ..It:'~M~~ .&..0
en'" 0 .S:: roO ~.S.
"" ..0 o 0 ........ ..0...,
.....
~.~
..., tn:::
rJl
<fl

~~ ~

..0
.~

~

H

""

:r1""

..0

>ii

>ii

9,9a 42.1

21.0

62

200

1.20

14.7

nil<

boO rl

~o

P

""

p

.S

'M

0..
w""

~

Naganuma

kf 552cright(Upperkf 552b

1/

-

38.4

18.3

5.2

2.10

1.26

135

Pliocene)kf 552d

le ft

-

38.3

18.0

5.0

2.13

1.25

13.1

kf 552e

right

<3

H

(!)

0..0 o~1:: lH.cl8
o..:B :v
0 . ....... d.S
0+' ..., ..., en.~.£ p.
0:

-0.>

:5tn

'1j

.:3

8

p

d

oj

>ii

Tumukikf 5550b2.06 1.52- -- - - - - - - - - - - 2.9 2.02 1.43 10.9
26.7 J3.2,left 9.S
24 2.10 1.58 11.1
left 6,63 20.6

(Holocene)

1d 5550cr ight 8, Sa 16.7+

kf5550d

left

'i3
.,...
;,;:.
....'"..0

kf 5550a..0<3-. _--_.-._-

-

30.5

14.8

7,7a 16.7

-

8.0

1.9

2.09+ 1.49+ 11 .4 -

7.8

20

2.14

Japan
(Recent )

1.49

]2.0

----

------

left 10,10a 24.8

12.2

3 1 1203

1.68

I

right

12

14.7

-

2.15

1.66

2

left

-

31.0± 14.8±

3.6

209± 1.56± J16 ±

""

1/

17

12.5

--

...;

4

d

~

5

<3

31.6

-

31.0

14.5

-

2.14

1.74

-

right 14,14a 31.0

13.7

3.6

2.26

1.70

11.6

13,13a 30.6

14.3

3.4

2.14

1.76

ILl

J. 6~ +

] 0.6-

1/'i3

T akai6II1630.1+ 14.5

3.2

2.08 +"-(Holocene)

7

1/

-

298± 13.0 ±3.3

2.29± ] .50± 1l.1 ±

8

1/

15

28.2

J3.7

3.5

2.06- 1.56

9

left

18

27.7

13.3

-

2.0S

1.56

-

10

right

-

26.3

12.0

3.0

2.19

1.63

11.4

11

1/

--

26.2+ 12.9

3.1

2.03 + 1.38 + ]1.8-

12

il

2.6

2.26

.~

..0
..0

<3

--

S;:l
.~

~

~

.s>'

<i

lJ,11 a 24.2

10.7

1.72

12.1

10.7

------ -- -- --D UNKEJ~'S

Philippin es specimen right(l~ecent) (after CLES-

-

S.O

170

SIN)

(2?) 2. 13

1.43(ll.S? )- -- - - -- - - -REEVE'S
specimenleft -=-1 :;1.4

Britain?
(Recent)- - - - - - - - - - - - Il<'oRBES &
7/S
1.3/4
2.00 1.40
H ANLEY'S righ t, in ch inch
specimen- - - - - -- - - -- - - -"Vien(Tertiary)

HORNES'
specim enri ghtNaples(Recent)

Q

u

-

-

'(

42.4

88 ) -

2.20

14.3

18.5

-

2.29

1.75

1.74

-

719

Molluscan F ossils from tIl e Rai ~e d Beach Depos it of Taka i

35 . Epitoni~Lm (L ineoswla?) y olcoyamai n. r:;p.
1927. Sca?c! l'!JW YOKOYAMA (not, So,i'E1my, 1847), Jour. Fac. Sc i, Imp. Univ
T. kyo, sect. 2, vol. 1; pt 10, p. 417, pJ. 47, fig. 2.
Only one small, imper fect sp ecimen W 2S collected.
Divi ng :-Centra l J a p an?

This species is quite distinct from Epitoniv.m lyrwn (SOWERBY)
in its evidently smaller size a nd its coarser sculpture. AlfiO it iseasily distinguishable from any other species of the genus from
.Japan, both r ecent and fossil, in the shape and sCl~lptur e' of the'sh ell.
38. lJiala picta A . ADAMS
F l. 40 (12), figs . 14-16
Diala pieta A. ADAMS, Anll . Mag. Nat.. Hist.., se r :1, yo l. 8, p . 243.
Diala piela A. ADAMS, Ib·iil., vol. 9, p. 295.
Diala p 'icta ANGAs, Prot:. Zoo l. Soc. London, p . 867.
Diala p ielc! TATE and MAY, Proc. Linn. Soc. New SoutL 'Wales, vol. 26,
p. 388.
1906. Dinla piela PRITCHARD and GA'l'LIFF, Proc. Roy. Soc. Victoria, vol. 18,

1861.
1862.
]878.
]901.

p . 61.

1913

Diala piela HEDLEY, Proc. Linn . Soc. N. S. 'Wales, vol. 38, p. 285, pI. 18,

fig 55.
Shell small, thin, regularly elongat e· ovate, shining, with :::ngled body,vhorl. Spire elevated, n arrow and acuminated, about twice the height of
the aperture. Protoconch small, conica l, a nd composed of two smooth convex whorls. Whorls exclusive of the protoconch si x, regular ly slowly increasing, rather high b et-ween the sutures, feebly convex, somewhat contracted at the sutures; suture impressed, but not very deep. Last whOl'1
slightly inflated, with angulated perip her y ; base rounded and very slightl ycontracted. Entire surface cf spire and base marked by n umerous spiralthreads and lines of growth; spiral threads subequnl, equidista nt, and very
closely set; these on the shoulder somewhat narrower an d more obsolete
thr. n those on the base; lines of growth subvertica l, a f ew of which a r edeveloped obsol ete va r ices. Ap erture subvertical, broadly o~al, rather acutely angled above and somewhat effused below; outer lip simp le, thin andsuarp ; columella slen der, comparatively str ong, slightly oblique a nd hardly
arched ; inner lip thin, very feebly expanded ; parietal wall cove red bya thin callus . Ground col our turn ed out into white, but colour bands andI ines still discernible ; ba nds spiral, narrow, chestnut brown coloured, five(; u the base and three On the sboulder, among the latters o'f wh ich one isl ocated near the upp er suture, another at about th e midst of the shoulder
a nd still another close to the ang- Ie; on the later whorls a nanower lJand
inserted between each p air of these three; COI OUl' lin es, numerous, chestnut
-

( 89

)-

K. S[;Z[;KI and K. I CEIIMim A

coloured, nne, divi ded into short strips ,llld arranged In lOllgitudin pI p a~rallels.
Only a single specimen was collected.
Living :- B6 syft to K yftsyft . Japan Sea. Tyo3en (Kore't).

In his description of this species from Takano-sima in Tateyama Bay, Bosyu, A. Adams has given n either its illustration nor
dimensions. The fossil from Takai as well as the recent :oh o11s
from Urusan in Tyosen (PI. 40 (12), figs. 1<1, 15) agrees "with theorig inal description given by Adams and the illustration of thetype specimen given by H edley except for a band of opaque whitespots on the last whorl. 10 compari son with th e recent specimensfrom Urusan, thi s fossil is slightly less convex and less slender,
more di stinctly angnla ted and marked by spiral colonr bands which
are more uniform in breadth, a little more nnmerous and arranged more or less in differ ent way. Moreover, its last 'whorl is not
so strongl y inflated.
The dilhensions of the fossil from Takai and the r ecent bp ecim ens from U rUba n a re as follows :H eight ofDiamet e r of apt.
I-Ieight Dia me1er
in mm .
in m m. inmm. aperture in mm.

F j .(~ iJr e

Loc.

--Takai(PI 40 (12 ), fig. 16)

68

3.0

2.7

2.0

Dru ~an(P l. 40 (12), fig. 14)

8 .2

3.4

3.2

2.0

Drusan (PI. 40 (12), fi g. 15)

7.2

3.1

2.7

2.0

Lli . St?'ombus (Cana?'i nrn) s~6cc h1,ct~6S LINNE
PI. 40 (12), fi gs. 18, 18a
1768.
1845.
1847.
1851.

St1'ombus su ccinctu s Lu,-Nli, Syst . Nat., ed. 12, p. 1212.
Sl1'omblls sucG'incl us K USTER, Conch. Cab., vol. 4, pt. 1, p. :-:0, pI. 7, fi g. H.
St1'ombus succincl us SOWER BY, Thes. Conch., vol. 1, p. 28, pI. 6, fi gs. 20, 21.
Sl 1'om bu s ·~ llcc in ct u s REEVE, Conch. Icon ., vol. 6, Sl 1'ombus sp. 43, pI. 17,. fig. 43.
1885. St1'ombus s1l':cinclus TRYON, Man. Conch ., vo l. 7, p. 116, pI. 6, figs. 56,
57.

1933 . St?'oml/us (Ln /,iost?'ombus ) sUf'c-incl u.\ Iw. TAKI, Suisan Do ' yo]mbutn Zuse-t u, p. 4.92, t ex t-fi g.

A s ingl e well p r eserved specimen 'was collected. Its dimensions are as
follows : I-l eight, 52mm.; Diam eter , 29 mm. Height of the a pertur e (exclusive of the canal a nd chal1nC'l), 40 mm.; Diamet er of the ap ertu r e, 11 mll1.
Living : -Sa gami to R yukyil. Ta iwan CFormosa). Philippines.

Although this charac ter istic a nd fine species is not uncommon- ( 00)-Molluscan Fossils form the Raised Bpach Deposit of Taka i721'

in the warm waters of Japan, its occurrence as a fossil has nothitherto been r epor ted from J apan.
The fossil from Takai perfectly agrees with the descriptions andillustrations of this species given by KUSTER, SOWERBY, REEVE,
TRYON and TAK!.
61. Clavatula consimilis (S~n1'H)
Pl. 40 (12), figs. 6-12
P llntl'otoma consimilis S~nTFI, p 'roc. Zool. Soc. L()ndon, 1879, p. 188, pl.
19, fig. 11.
1882. Pleurotuma consirn·ile KOBEL'.r, Couch. Cab, vo l. 4, pt. 3, p . 190, pI. 37,
fig. 7.
]920. Drillia n'ivaUoicles YOKOYAMA, J uur. CoI l. Sci., Imp. Univ. Tokyo, vol.
39, art. 6, p . 39. p1. 1, fig. 27.
1927. Dr-ill'ia n'iralioides YOKOYAMA, Jour. Fac. Sci., Imp. Univ. T okyo, sect.
2, vol. 1, pt. 10, pp. 393 (part), 4W.
1935. Clct'lXttu/Ct cons';m·ilis OTUKA, Bull. Eal'tb q. Res. Inst., vo l. 13, pt. 4, p. 872,
pI. 54, figs. 103, a-c.
1879.

Several spe'cimeus were collected .
Divin g :-lVIutu Bay to Kyusyu. Japan Sea. Ty6seu (Korea). Chiua Sea.

The followings may be suggested by our r enewed study on th e
Y OKOY AMA';:j original specimens of D1'i llia nivalioides :1) D. nivalioides YOKOYAMA which has originally been instituted with two specimens from the Kosiba and Naganuma bedsof the Pliocene age in Kanagawa 'Prefecture may be a synonym o~Claval1da consimilis (SMITH).
2) The specimens collected from the Pleistocene sh ell- beds of
Ozi in Tokyo and Namamugi in Yokohama, and r efen d to D .
nivcdioides by YOKOYAMA also seem to belong to the S~U'l'H'S species.
3) Those collected from the Pleistocene deposit of D6kwanyama in Tokyo and from t.he P liocene Omma beds at Omma andNagaya, I sika,va prefecture, and r eferred also to D . nivalioides by
YOKOYAMA on the other hand may be identifiable with Clavc~ t1da
pat1"l.~eli8 (ShlI1'H) and C. pc~t1'1~elis dc~inichi ensis (YOKOYA)L-\.) r espectively.
4) Among the specimens of C. consimilis in our In stitute collection, th ere are, h owever, two forms to be distinguish ed. 011e isr epresented by the specimens from Takai, Naganuma and Namamugl (P t L10 (12), figs. 6-8, 10, 11) and the other is typified by those
-(

!)I

)-

722

K. SUZ UKI and K . ICH IMURA.

from Kosiba, Ozi and Tumuki (PI. 40 (12), figs. 9, 12) as \vell as
the living specimens of Sagami Bay k ept also in our Institute.
The two differ in the axial ribs which are stronger ,in the former ,but such a minor distinction may be insufficient even for the subspecific separation.
The climensiolls of some iliclividuals ar e as follows: -Loca lity

Specime ll
numberSagami Ba.y
(Rece nt)

1

Aperture
Figure num- I-I eight Dia:m eterbel' on PI. 40(12)in mm . in mOl. Height Diameterin lIlli. in mm .
15.3

5.2

5.6

2.1

4.3

2.0

4.9

2.~

4.7

2.0

3.8

1.6

1

6,6a

12.4

4.3

2

7,7a

]23

4.2

3

--

12.1

4.2

4

--

]0.4

3.8

5

8

10.2

3.9

3.9

1.8

6

--

7.6

3.0

3.1

]3

l>zi
kf3349a
Pleistocene) (D . nival'io'i des )

9

12.2

4.4

4.7

20

N anlalllugi
kf3828Pleistocen e) (D. ni-valioides )

--

13.3

4.6

5.4

2.3

10

]40

4.6

4.6

2.2

11

12.2

4.3

4.6

2.1

12

]6.0

5+

6.4

?

T akai(Holocene)

Id332 ('1'ype ofNaganum a D . nivalioicles)(UpperAnoth er
Pliocene)
specime n
Kosiba kf331 (Type of(P lioce u e) D. nival'ioicles)

-

(

92

)-

I

I
I

723.

Mo!!usP,JU Fossils from the Raised Beach Deposi t of Tnkai

nIHil 9 t.l:'T!r;I:Jil ;:Jm~~jfiJ1E:-tto:t!l'i;>j;:a:, :lEKit*il;wMft ~J: Jlt~ q~<-jf;-;J-o;>JU: U Co*!Ulll~ 64, r"I~%X !l!Jl 28, 1mUE'IJ~ 1,

mVE'iJi 35 fillo 11:.:E cDi;\l::{f)'1k!ilH1tl; tc·.&.tff-o
Q!CKIli'l'f1l 2 t.PI'C , mJ·;fJt:zp.r.£:il ; [l'i]-~ T1f.l: ~ 16 fjllQ).l'l.11:. :E rr ~~{{!f L.-c m-i?;fl..O;j:, ;¥t.
c@:'iiiSil ;~jI:1'if~f (D f)Yi*'I' K t JWI ~;fl.. te o Xc@: 64 fill'!' 9 l111f'J:ill),:+-:J·r.£: ;j; ~M*:I:t!! ;r:?;Ht'11e)i '!'fl'i
Mil> b ~~-',!r L. -C m- b;fl.. tt, v' t Q) I: ;h 0 0:<j;:.l'l.11:.;P'lfH13~ C L.-cr:r ;>j;:~*urAi1'JJ ~* c.l: ~}iX~, -!lf~~UI'Jt,r 'll.i\I)J~~~ 1';t;fl..-Chtt, v'o {,l: m~c L.-C ,1 '?t{.~1))H H.l: V*c1+! K ?Eoiflj:j'I~ ".:> .l'l. !liMIH'C IH;'ir1J. Y o o :ffC,?-C:<j;:J'l.JITi-:1ffi. :I:t!! Q)*.I';t.~ Q) m ~ .Q) k;fl..c~ t [l'i]t~, .~~.l:g.~~ '? kW~~ effl~~

Q)* • .l:~a.I: ~ '?kc l';t ~ I';t ;fl.. ~oX*.l'l.11:.:E1IHtili::JJ1'-tt 0 ~ 1l~fH~Wk ~ i'!' fkl1t.l'l. 11:. :E~f'foK :r'~ i(, .l: < '1illrr). L. , m ~W'k JJj·J)j))litfl/!)f~ k ~1- C t "TulG ~ (0. -C h 0
L;l> L.fJj\;illj-tJIimFn ~ ffJ2lil:rPIHM!I.1 J Cft:11~ l1HlZlO -\"' :f,: zp'f("1I1ij
0.:I:t!! m ( ~.~, ~ ~,.~, ~~ ~a.) K ~~o ~ mMQ) .l'l.~ :E $ c~ ~~Ao oc: M i :ljtf.i![:I:t!! ct~,~JU!.) m:f}~ Q) /h¥nc i;H (D I: ~ b 5 0
TlrtJ Q)wM1lEK ,U 1- i';f, i2S~ I:, WiYJk, (.flU=<, ~ t:'~i;; Q) i'!l:f/{Mft mif t [l'i]f1~i'! 9J C'.:> t ".:>1: <0 0 ;6"
1im1i1' C''> f fJ2l'iifJ':tft:§'(qfJ J I';tz~t.l: ~ .)}tiv'o :lEKHcmliv.i: UfJIU;ftt,~ OIn~:til- rr W, -C'ktlJ~frli)lJ M ~ HC j!iXo o)'lkU1: lc~JlJ;jc ;h o:f:illij;'Ji 6 fillK 1iJL-CITc ~iX:;](,:uqLIDi:~Jrr1JII , .... -C ;t5v' t:: 0 fM SW ift l ym YOKO Y,AMA,

H)27 (not SOWERBY, 1847) K ~l L. Epitoniw n yokoyamwi t,r o~ifill45 :i:::ffHll L. k oExplanation of Plates 39 (11), 40 (12)Plate 39 (11)(All figures natural size)
Zozict ctbb1'evicttct (GOULD)

Figs. 1-5.
Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.
Fig. 5.
Figs. 6-8.

Recent sp ecimens from the coast of BosyiLSpecimen No.1 . Ri ght valve; fig. l,extel'ior ; fig . la, interior.
Specimen No.2. L eft valve; fig. 2, ext erior; fig. 2 a, interior.
Sp ecimen No.4. Right valve; fig. 3, exterior ; fig. 3 a, interior.
Specimen No . 3. ' E xter ior of rig ht valve.
Specimen No .5. Right valve; fig. 5, ext er ior; fig. 5 a, int erior.
Specimens fro m the Holocene terraC 3 deposit of Tumuki, I sikawa prefe cture.
Fig . 6.
Specimen No. kf 5550 b in the collection at Imp eria l Universityof Tokyo. L ef t valve; fig. 6, exterior; fig. 6 a, interior .
- ( 93) -K. SUZ UKI anu K. 1C Hl~LUH A

7:14

Specimen No . kf E550 d. L eft valve; fig. 7, exterior; fig. 7 H, i nter ior.
Specimen N o. kf 5550 c. R ight valve; fig. S, exterior; fig. Sa,
Fig . S.
interior.
Speci men No. kf 552 c from the Upper Pliocene Nagan u ma beds
F ig . 9.
at Naganuma, Kanagawa prefecture. Right valve; .fig. 9, exterior; fi g-. 9 a, intel·jor . .
Fig. 7.

Zozia abb?-ev iatct (GOULD) val'.
Fig . . 10.

Recent specimen from an unknown l ocality In Japan . L eft
valve; fig . 10, exterior; fi g. 10 a, interior.
Figs. 11 - l S. Specimens from the r a is ed beach deposit of Takai , Tiba
prefecture.
F ig . 11. Specimen N o. 12. R ight valve; fig. 11, exterior ; fig. 11 a, interior.
Fig. 12. Specime ~ No . 1. Exterior of right valve.
Fig. ]3. Specimen No. 5. Right valve; fi 'o·=> ' 13, ext erior; fi oo'· 13a, Interiol'.
Fig. 14. Specimen }J o. 4. Right va lve ; fig . 14, ext erior ; fio·:=>. 14a, Int erior.
Fig. 15. Specimen N o. S. Exterior of right valve.
Fig . 16. Specimen No.6 . Exterior of right valve.
F ig . 17. S pec imell No. 3. I nterior of left valve.
'Fig. I S. Specimen No.9 . Exteriol' of left valve.

P late LlO (12)1Ilacoma (P sammacoma) awa.jiensis SOWERBY. Fossil from Takai .
Left valve ; fig . 1, ext erior; fi g. 1 a, inter ior. L eng th 16 .0 mm.,height 10.0 mm., thickness 2.5 mll ~ . X 2.
Figs. 2- 4. Ve nus (Chione) micra (PILSBRY). R ecent specim en s fl'om S ngami Bay. X 2.
Fig. 2.
Right valve ; fig. 2, exterior; fi g . 2 a, interior. L ength 11.1 111m.,
height 9.1 mm, thickness 2.9 rnm.
Fig. 3.
ExteriOl' of ri ght valve. Length 9.3 mm., height S.Omm., thickness 2.5 mm.
Fig. 4.
E x ter ior of left valve. Length 11.5 IIUTI .; height 10.0 mll1., thickn ess 3.0 mm.
F ig. 5.
Venus (Chione) micra (PILSBRY) . Foss il from 'l'akai. Exteriorof left valve. L ength 10.3 ll1m., height S.Gll1m., thickness 3.0 ll11l1.
x2 .
Figs. 6-S. Clavat u. la consimilis (SMITH) . Fossi ls from Takai. X 2.
F ig. 6.
Specimen No. l. l!--'ig. 6, aper t nr al view; fi g. 6 a, back view.
F ig . 1 .

-(- 94' ) -725

Molluscan Fossils from the Raised Beach Deposit of Takai

Fig. 7.
Specimen No.2. Fig . 7, ap crtural v.iew; fig. 7 a, back VIew.
Fig. 8.
Specimen No. 5. Side view.
Fig. 9.
ClavatuZa consimilis (SMITH). Sp ecimen No. kf 3349 a in thecollection at Imperial University of Tokyo, from the Pleistocene
shell-beds of Ozi in Tokyo. (D"illia nivaZioicles YOKOYAMA.) x2.
Figs. 10,11. CZavCttuZa consimilis (SMITH). Specimens from the Upp er
Pliocene Naganuma beds at Naganuma, Kanagawa p refecture.
x2.
Fig. 10. Specimen No . kf 332 in the collection at Imp. U ni v. Tokyo,
one of the t ype specimens of D?'illia nivaZioicles YOKOYAMA.
Apertural view.
Fig. 11. A p ertmal view of another specimen fro m Naganuma.
Fig. 12. CZavat ~G la consimilis ( S~II TH) . Specimen No. kf 331 in the collection at Imp. U niv. Tokyo, from the Pliocen e Kosiba beds at
Kosiba, Kanagawa prefecture. One of the type sp ecimens of. Drillia nivalioicles YOKOYAMA illustrat ed by YOKOYAMA (Fossils
from the Miura Penin sula anc1 Its Inuuec1iate North, 1920, pI.
1, fig . 27). X 2.
Fig. 13. Cancellm'icG (M erica) lMicosta L:iBBEOKE. Fossil from Takai.
Fig. 13, apertural view; fig. 13 a, back view . . H eight 37.2mlll.,
diameter 21.8 mm. Natural size.
Figs. 14,15. DiaZa picta A. ADAlIfS. R ecent specimens from Urusan, Ty6sen (Korea). X 3.
Fig. 14. Specimen No.1. Fig . 14, apertm·al view; fig. 14a, back" view.
Fig. 15. Specimen No. 2. Fig . ]5, apertul'al view; fig. 15 a, back view.
Fig. 16. DiaZa lJicta A. ADAMS. Fossil fr om Takai. Fig . 16, aperturalview; fig . 16 a, back view. X 3.
Fig. 17. Cel'ithium (P l·oc.lava) pfeffe?'i DUNKER. Fossil fro m Takai: Fig.
17, apertural view; fig. 17 a, back view. Height 25.0 mm., diameter 8.0 mm. X 2.
Fig. 18. S t?'omb2GS (Cana?"ium) succinctus LINNE. Fossil from T akai. Fig.
18, apertural view ; fig. 18 a, back view. Natural size.

-( 95) -

.JOlll'. Gcol. Soc. J apall, V ol. "13 , Pl. 3D (11) (K . SUZUKI R,11I 1 E:.

C. UE KI Photo.

] (' I[J \ Jl'JU )Jour. Geol. Soe. J apan , Yo1.43 , PI. <10 (12 ) (K. S UZU.KI and K . TCJTDl('R.-\ )Jft

C. Dr-a';:I Photo .

21. Pliocene Mollusca from Manganzi iri'
Kotomo-mura, Akitf! Pref., Japan.
By
YANOSUKE OTUKA(Contribution from the Earthquake Research Institute, I mp. Un iv', .Tokyo)[Read June 13 th., 1936; .received July 12 t.h., 1936]

The Pliocene mollusca from Manganzi in Akita prefecturestudied by Dr. M. YOKOYAMA(l) a few years ago were collectedfrom the vVakimoto sandy shale, the upper division of the Yuri
series, which is believed to be Pliocene in age. On a cliff eastof Manganzi village the vVakimoto sandy fihal( ~ bed is exposedintercalating with a lens of fossiliferous sandy gravel. This lensof sandy gravel is the fossil locality of Manganzi. It contains
many mollusca which the writer will call ihe Manganzian fauna.
The writer ( ~ ) collected 25 species, besides the t wo specie:::, Pse'udogmrnrnatoclon dalli obliq1{'atcL (YOKOYA~lA) and Glycyrne?'is vestitHs(DUNKER), which have already been reportod by M.YOKOYAMA.
Table I shows the species of Manganzian fauna. Most of theManganzian fauna are now living in Norther n J apan and in cold
deep waters. Of the Manganzian fauna (about 70% ) 19 species
are found in the fauna of the Onma series in I f:i ikawa prefecture,
which is believed to be the middle or lower P liocene of Japan.
The extinct species common to both faunae are Lim.opsi s to7::aiensis
Y OKOYAJlfA, 1I1e?'t;ena?'ia yokoyama i l\'IAKIYA MA, Umboniwn (Suchi'I.Lm)
akitanum, SUZUKI, 'P'/.{,?·?·itella (HaustcLto?') saish1Lensis YOKOYAJlfA,'l'achY"'hync7w s venustelrus (YOKO YAMA), and Bittinrn y okoya?1wi
OTUKA. Some of these fossil species are very common in theJapanese Pliocene. Brief descriptions of the new and rare species
follow.

M. YOKOYA1fA, Jour. Fac. Sci. Imp. Univ. Tokyo, sect. 2, I, 9 (1926).
(2) A detailed stratigraphy of this r egion was g iven by tb e ,,'riter in Bull.
Eurtbq. R es. Inst. Imp. Univ. Tokyo, 14,3 (1936).
(l)- ( 96 ) -727

Pliocene Mollusca from Manganzi in Kotomo-mura, Akita Pref., Japan_

Table I.
Nucula (Nu cula l n-ilJonica S:ilHTH• Yoldia (Cnesteri um) 7ceppeliana notabilis YOKOYAlIU• L-imops·is t olcaiensis YOKOYAlIfA• Glycyme1-is yessoensis (SOWERBY)• Arca boucanli JOUSSEAU1I1E• Anaela1'a satow·i o?nmaens·is OTUKA n. subsp ,• Astarte bo?'ealis (SCHUMACHER)• Asta1·te ha,lcodatensis YOKOYAMA• Venericarclia fen'2tginea (CLESSIN)•. Ca1'diu'm (Ce1'astocle1'ma) cilia tum ? CF'ABRICIUS)
Me1'cenaria yo/coyamai .MAKIYAMA
S pisula g1'ayana SCHRENCK
l' ellina sp ,. Pandom (Kenn e1'lia) pulchella YOKOYAlIIA• UmQoniu?n (Suchi 1.l ?n) a7c·i tanu,m SUZUKI
TU?Titella (H a2tst ato1') saishuensis YOKOYAMA. 1'achyrhynchus venustellus (YOKOYAJlU)• Hittium yo7coyamai OTUKA n, n .
• PolUnices d·i dyma (BOLTEN)• N at·ica jan th ostoma D ES HAYES
l'ritonalia (O cineb1'ellus) aclunca (SOWEREY) subsp ,Cancella?'·i a m u myama·i YOKOYAMAe Antiplanes pe1' pe1'Sa contra1'ia (YO KOYAMA)
L01'a og2wana (YOKOYAMA)
Lora elissolu ta (YOKOYAMA)PSe 2telograml1~at odo n daW obliqu ata (YOKOYA MA)*
• Glycyme?'is ves titu s (DUNKER)";Nuculct (NI,£C'Mla) n iponica SMITH (Fig. 1 a, b; 2)1885 11[ucula niJ)onica S~IITEf, Voy . .H. M. S. Challenger Zoot R ep. LamelZib1'anchiata, p. 226, pl. 18, fig. 8, 8a.
~929 Nucula (Nucula) niponica KURODA, "Venus"

1. 3, App. p. 7, sp. 6.

SOWERBY d escrib ed this species as follow s : "T est a m a gna , tenuis,
ova lis, v alde inaequil a t eralis, epidermide nitida olivacea induta, incrementi'lineis tenuibus st l'iata, line is p aucis radiantibus obsoletis impressa. L unulainconspicua, impr ession e h aud profunda circumdata , Umbones pallicli,
convoluti , circa in 1/4 long itudinis totius positi, Pagina interna irides.cens, caerul eo-ma rgarit a cea, r a diat im tenuissima s ubstria ta, a d marginem*

The writer was unable to collect these species .

• = Co=on species between Onuna and Manganzi.

-( 97 ) -Y.O'fUKA

acuta et integra. Fossa ligamellti profuoda, intra val vas oblique Pl'ojccta.
Dentes elongati, aculi, in numel'O circa ~5, quorum octo ante um:"onessunt".

'Type locality: 345 fath. South of h. N ipon ( = Japan).
Dimen sion of spec'i es :Type sp. (afte r Smith)
Rg. No, 1096 in E R. 1.
fro NE Japan (fig. 1)
Rg. No 3084 in E. R. r.
fro Manganzi (fig. 2)

Tbichn css
Dmm

No. ofNo. oft ee th . ante rior t eeth .
824Length22mm

H e ight
15mm

1i:Jmm]2.7 ])]111

4.1 x ~]TIm

25

8

I2mm

9.5mm

3 x2nlrn?

?

Geol. mnge: Pliocene-R ecent.
HIRASE and the vessel "Soyo mal'll" collected this species
from Northeast Japan. The fossil from Manganzi is a small
specimen lacking the anterior margin, but otherwi se closely
agreeing with SMITH'S description. Fig. 1 is the fossil specieE',
while fig. 2 is the specimen from NE Ja.pan.
J:'oldia (Cnesterium) kcppcliwnct 'I'W f(tbilis"' YOKOYAMA(fig. 4, 5)
W22 Yoldia notabilis YOKOYA~[A, J our. ColI. Sci. Tokyo Im p. Univ., 44, 1, p . 1D6,

pl. 17, fig. 10.
1927 Yold'ia notabU·i s YOKOYAMA, .Tour. F ac. Sci. Imp. Univ. T okyo, sec. 2. 2.

4,p.170.
I fl29 Yoldia notabili.~ KURODA. "V cnus", 1, 4. App, p. 11, sp. 40.

This species was first described by M. YOKOYAMA based on a
fossil specimen from the upper Musashino formation. It is stillfound living, having been collected. from northern and central
Japan.
'Type locality: Upper Musashino formation (Sisui, Ootake).
Dimell sion of species :Holotype in Geol. lust. Tokyo
Imp. Univ. Rg. N o. 1611
Rg. No. 1017 in E. R. I. fl'.
Haragama (Fig. 5)
Rg. No. 3078 in E. R. I. fl'.
Mauganzi (Fig. 4)

H eight

L eugthThickness

18.8 m])]

36.1mm4.5mm

Numbe l'of t ee th
about 4628mm

56.7mm

7.Imm

56

]lmm

29mm

?

?

Geol. mnge: - Plioeen e (Omma sories in Isikawa pref.; Yuri
series in Akita pref.)-Pleistocene (Sisui and Otaka in Tiba prC'f.)-Recent (northern and central J apa1:t).
- ( 98 ) -Pliocen e Mollusca from Mangauzi in K otomo-mura , Akita Pref., J apan.

729This species is closely allied to Yo l dia johanni D ALL' l ., but
the former has a sh ell with narrowed posterior end which isturned upward, whereas the latter has a sh ell wit.h a broad
posterior which is not upward. The concentric grooves on theshell surface of Y . notabi li.s YOK OY AMA reach the anterior margin.
The oblique grooves do not reach the anterior end.
The living specimens of Y. n otabi lis YOKOYAMA are covered
with blackish brown periostracum, while Y . johanni DALL .is
cover ed with yellowish brown periostracum. The muscular impressions of the left valve of the former species are shown in fig.
4. Fig. 4 i s the fossil specimen from Manganzi and fi g. 5 a living
specimen from H aragama in Hukusima prefcture.
Yoldia SCi sslL1'ata st1'igata DALL(~) is another allied species to
YOKOYAMA' S species.
But the former has a more equilateral
sh ell. The original Y oldia lcepp eliana S OWER By(3) is closely related
to th is species, but judging from ' SOWER BY' S descriptions andt ext figures, t he ' fon ner is distinguished from the latter in its
peculiai' truncated- posterior end. Y 1iotabi lis YOKOYAMA has ashell narrowed in the po,t erior half.

Anadcw a sa,towi omnutensis OTUKA n. subsp. (fig. 3, 8 a, b)
Shell m ed ium sized, thick, sub qua drat e, longer tha n h eig ht, proportionof shell l en gth and hinge l en gth ab out 5 t o 4, equivalve, slig htly inecjuila teralroundly in f r ont , obliqu ely trun cate b ehind, br oadly arched at ventr e andwithout m ::tlc ing any a n&,le at antero-venh'al 0 1' at post ero -ventral corner.
Surface rac1iately r ibbed; r'bs a bout 38- 36, u su all y somewhat n alTOWel:
than inter vals 0 1' al most equal to intervals ; g rowth lines fin e, regular, alittle elevat ed and crossing ribs a s well as their intel'Vals. B aak moderate,situated at an t erior on e-third of le ng th of hinge lin e, curve d i nward.
Hinge line straight, abou t 7/10.5 of shell length. Area loze nge shaped,
or namen ted wi th on e obli que and on e v-shap ed g r ooves.

Dimension oj holotype :H olotype (Rg. No. 1089 in E. R. I. )Typ e loccd;ity:(1)

DA LL, Proc. U.

(2)

DALL, U. S.

Length54 mm

H eight Th ickness Num ber of ribs.
44
35 mm
38-36

=

Nagaya near K alJ azawa, Muddy sand of the

S. Nat. Mus. 66, (1925), Ar t. 17, p. 31, pI. 19, fig. 2.
Geol. Surv. Prof. P aper 59, pp. 18, 104, pI. 14, figs. 9-9 a,(1909).
(3) SOWERBY, P roc. MaIne. Soc. 'London, 6, p. 176, text fig. on p. 177, (1904).
- ( 99)-

Y.OTUKA

730

Omma series.
Original Ana satowi DUNKER ( 1) is an allied species to thissubspecies. But the former species has a shell with angulated
antero-ventral margin. The most t Convex part of the ventral
margin of the former is situated in the middle of the shelllength, while that of the latter is at the posterior third of it.
A?·ca satowi castellata YOKOYAMA (') from the Pliocen e of Dainiti
has a mor e oblique sh ell with narrower hinge area .

..Astctrtc bOl"calis (SCHUMACHER)
1817 TI~iclon ta bOj'w lis ScrrmIAcHER, E ss. Nouv. Syst. Hab. V crs T es t ., p. 47, pi,
17, fig. l.
1881 A stw·te b 01'eal'i ~ , E. A , S~UTll, J oum. Conch., 3, pp. 216-220.
1922 Astaj·te borea lis (CHEMNITZ), M. Y OKOYAMA, Jour. CoIl. Sci. T okyo, Imp. Ulliv.,
44, 1, pI. 10, fig, 11 a, b.
1926 A stm·te b01'eal'is YOKOYAMA, J our. Fac. Sci. Imp. Univ. T okyo, sect. 2, 1, 8,
p . 298, p I. 37, fig. 2, 3.

Geol. mnge : Miocene (Alaska)- Pliocene (Sawane bed in Is.
Sado, Omma series in I sikawa pref. )-Recent (Northern Japan,
Polar and Bering 8eas, Alaska).

..Asta/I"tc lwlwdc~tcnsis YOKOYAMA
1920 Astm·te hakodatensis YOKOYAM A, J our. ColI. Sci. T okyo Imp. Uni v., 39, 6, p.
140, pI. 11, fig. 5, 6.
1935 Jiftm'le haLodalemis O:rUKA, BUll. E arthq . R es. lust. T okyo Imp. Ulliv., 13,4, p. 889, pI. 56, fig. 148, 149, 150.

YOKOYAMA reported living sp ecimens of thi s species fromHakodate.
T '!:Jpe locality: Pliocen e sand of the Kosiba bed near Y okohama.
Dimension oj sp ecies :Holot )' pe in Geo!. lust. '1'. I. U .
P a ratyp e in Geol. Inst . '1',1. U.
Sp. from Manganzi (rg. no. :~ 101 )Geol. mnge :length12 m m
10 mm
9.5 mmh eig bt
11 m m
9.5 m m
0.0 mmt biclmess
3.5 mill
3 mm
2.7 mmPlioceno (K osiba bed, Omma series, Sawane(1) DUNKER, Index Molluscorum Maris J a pollici (1882), pp. 233-4, pI. 9, figs.
1-3.
(2) YOKOYAMA, Jour. ColI. Sci. Tokyo, Imp. Gnil' ,,45, 2 (1923), pp. 17-18, pI.
2, figs. 10-13.
- ( 100)-

731

Pliocene Mollusca frOll1 Manga.nzi iu Kotomo-mura, Akita Pret., J apau.

beJ, Anden shell bed.

Mangallz i of the Yuri series.):-Pleistocene(U pper Musashillo form ltion)-Recent (Hakodate).
lIIercenaria 'lJolwyarnwi (MAKIYAMA) (~g. 6 a, b)
Jap. Jour. Geol. Geogr:, 2, p. 6, pI.
,X, fig. 5 (not of Gould 1861),]026 Venus (j![el'ccnal'ia) stimpson'i YOKOYAMA, Jour. Fac. Sci. I m p. {luiv . Tokyo,
sec, 2, 1, 9, p. 381, 379.
1927 Venus yol~oyama'i M ArJYAMA, Mem. ColI. Sci. Kyoto Imp. Uuiv. ser. B., 3, 1,
pp. 47-46, pI. 2, fig. 8.
19~ Venus Ulc'r ccnaria) stimpson'i YOKOYAMA,. In its sculpture, thisspecies is closely allied
to 1J1e?'ce1w?'ia stimpson'i(GOULD) (l>, but the former
has a longer sh ell. The
differences between these
two species will be clearlyseen in the following tableand graph 1, showing th edimension of th e detachedvalves. Tho units are millimeters.
j![ st'imlJSoni (GOULD)

86.0 mm86.5 1/
II
90.5 IIII. 91.0 II
II
104.0 IIII[,5 .0 II
II
fl1.0 II
II
93.0 II1/
95.0 IIlJ[ yokoyamai MAKIYAMA 73.0 IIII
69.0 II
II
74.5 1/
II
77 .5 II
II
56.0 II
II
63.0 II
II
56.0 II
II
40.0 II1/

H olotype:

•

o

L 10

71

_ 1IttI} stim.psoniG

66.0 mID
68.0 1/
71 .0 II
72.0 II
82.0 II
44.0 II
73.0 II
72.0 II
73.0 II
60.5 II
56.5 II
63.5 II
65.0 1/47 .0 II
5:1 .0 II
48.5 II
34.0 II

OG

0.77
0.79
0.79
0.79
0.79
0.80
0.80
0.77
0.77
0.83
0.82
0.85
0.84
0.84
0.84
0.87
0.85

No. 220 in K yoto Imp. Univ_(1) GOULD, Otia Con ch, p. 169 (1882).
-( 101 ) -(living Aomori pref.)
II
II
II
II

(Pleistoceue, Semata )
II
II
II

(Pliocene of Anden)
II
II

1/

(Pliocene of K akegawa)
II(Pli ocene of Manganzi)(Mi ocene of Kimati)

732

Type locality:

Honohasi , P liocene of Kakegawa, Siduoka

pref.
Geol. 1'c61~ge :from Manganzi.

Miocene-Pliocene. Fig. 6 shows the specimens

PandO'l"(~ (.Kenne1"U(~) pttlchell(.~ YOKOYAMA (fig. 10)1926 Pandom pulchella YOKOYAMA, Jour. Fac. Sci. Imp. Univ. Tokyo, sec. 2, I,
pt. 9, p. 387, pl. 45. fig. 4.
'1933 Calo]J Qdiwn p ulchellum ONOYM!A, Chikyfl, 19, 4, p. 266.

'Pype locality: Anden shell bed (Pliocene) .
Dimensions of species:
Sp. fro Anden (Tg. no. 2210 E. R. I .)Sp. fr o Manganzi (rg. no. 3099 E. R. I.)

L ength28 mm
33 mill

H eight
17 mm
16 mm

Geol. mnge : Pl iocen e (Omma series, Takanosu series, andYuri series) .
This species is cloi:iely allied to Pandom bica?'inata CARPENTER
var.< ) (fig. 7 a, b) an d Pandom ~ua1'Cliana A . ADAMS, but thepostero-dorsal margi n of YOKOYAMA'S species is straight or slightly
concave while the latter two have convex dorsal margin.
The specimen from Manganzi is an imperfect right valve, butclosely agrees with th e description of YDKOYAMA and holotype
and topotypes.
:L'achY1"hynchus 1Jc'Jl//'('stelltts (YOKOYAMA)
1927 B ittium venustell "s (Y OKO YAMA), Jour. F ac. Sci. Im.p . Univ. Tokyo, sec. 2,2,4, p. 175, pl. 47, fig 7.
1933 Tachyrhynclm .\ ven"Rf ,·1/u.\ ONOYAMA, Cbikyfl, 19, 4, p. 270.
1935 Tachyrh ynclms ven ll.,f pU·UR OTUKA, Bnl l. Earthq . R es. I nst ., 13, 4, p. 855.

The specimen fro m Manganzi lacks the apertural part, but
its dimen sions and itH characteristic four spiral cords closely agreewith those of th (~ type Rpecimen.
This species W fl ~ formerly believed to be Bitti-um, but it has(1)

Bri t . Assn. Adv. Sci., R ep . for 1863, p. 638; According to
is a synonym of random bil-irata CONRAD(Proc. Acad. Nat. Sci. 1'1Ii Iadelpbia, 7, p. 267, 1855). Pandora bilh'ata CON RAD
has a more elonga t erj 10\\'(:1' sh ell than tu e J a panese specimen. Present writerconsiders tbat th e J araJ1t.'se Pandora b'ica1'inata m ay. be anotu er distinct speci es,
which is shown in fig. 7 1I, b.
CARPENTER,

DALL, · PandMa bicarinuf f , C A RPENTER-( 102 ) -

Pliocene Mollusca from Manganzi in K otomo-mum, Akita Pref., J apan.

733

smooth spiral cords and no varix. T he columellar end of thisspecies is not canaliculated as in B ittium.
Type locality : Omma series near Kanazawa (Pliocene).
Geol. mnge: Pliocene (Omma series of I sikawa and Toyama
perfecture; Yuri series of Akita prefecture).

Bitti'l,tm, y o7wyctmai OTUKA n. n. (fig. 12)]926 B itti1l1n binodul osum YOKOYAMA. J our. Fac. Sci. Imp. Univ. Tokyo, sec. 2, 1.
p. 270, pI. "32, fig. 15 (not of YOKOYAMA, 1920).

Shell high turreted, apical angle 18; lower half of shell surface ofearly whorls sculptured with two nodular prominent cords forming aperiphery. N odules situated at intersection of axial ribs a nd spiral cords.
Upper half of early whorl sl oped, sculptured with f ew sp iral striae.
Lower surface of later whorl SClllptured with t wo Or three weak spiralcords. Interspaces bet ween these cords very n arrow_ On succeeding
suture is a prominent smooth spiral cord; base slig htly concave or fiat ,sculptured with five t o six spiral cords; columellar end slightl y canaliculated; lat er few whorls slightly varicosed; number of axial ribs 11 to
13 in earlier whorls, 18 to 19 in later whorls.

H olotype: Rg. No. 3100 in Earthq. R es. Inst. establish ed as
an incomplete specimen from Manganzi whose apical and aperturalparts are slightly broken .
Dimensi on oj holotype :Numbe r of whorlheight11

J2.2mmlargest diameter
3.5mm

apical angle
18

YOKOYAMA united this species with Bitti~~?n binod~dosum
YOKOYAMA(l) from the Pliocene near Yokohama, but this species
has a larger Eh ell with smaller apical angles than the latter_ ·B itti~~m binodulosum from the Omma series m ay be anotherdistinct species.
Bitti~~m binodulosum from the Upper Pliocene of the Sawane
shell sand of I s. Sado agrees with this species.

Tritonctlia (O cineb1'ellus) ctd'ttncct S OWERBY subsp.
(fig. 9 a, b, 13 a, b, 14, 15 a, b)
1922 Ocineb'·afalcata YOKOYAMA, Jour. Coli. Sci. Toky o Imp. Univ., 44,1 , p. 65,
pI. 3, fig. 4 (n ot of SowElmy 1840).
(1)

M. YOKOYAMA ; J our. ColI. Sci. Tokyo I mp. Uni v. 39. 6 (1920), p. 68, pl.

4, fi g. 8.
-( 103 ) -

Y.OT uKA734

Shell moderate, fusiform; whorls about eight; nuclear wl~ orl twosmooth, I'einajni:1el' an gulated, almost horizontally ' and flatly truncatedabove, and slightly convex below angle; varicose; varices vari:tble, 'from
six to seven on body whorl, about eight on penultimate, eleven on preceding whorl of penultimate ; in general, varices prominent neal' aperture,extended lam inately showi ng prominent spinosity at' angl e.
Vi7hoJe surface covered with spiral ribs. Narrow interspaces between
these r ibs excavated with fine longit udin al laminae. Number of spiralr ibs about ten to eight on sllrface below angle of penultimate, three tofour on surface above angle of penult imate. Suture slightly contracted.
On body whorl foul' prominent and about thirty two spiral ~·ibs. Aperture
subelliptical, lip prominent, smooth within; outer lip with about fourteen
weak horizontal furrows internally, which become obsolete inward; lastvarix forming broad lat eral expansion to lip; canal closed sligbtly
recurved backward.
Dimension of hypotY1Je of fig;. 13, 14, and 15.
R g. no. 3098 (from lVIangDnzi) (F ig. 15) height . 44.5 mm; largest
diamet er 24 mm; height of apertural surface 30 mm; lar gest diamet er of.
aperture 15 mm; shortest diameter' of aperture 9.6 mm; Rg. no . 986 (fromSemata, Plei sto cene) (Fig. 13 a, b) height 43 111m ; largest diameter 21.6
ml11; height of apertural surface 29 mm; largest diameter of apert ure
14.7 mm; shortest c1iameter of a perture 9.2 111m.

Gcol. Tangc: Pliocene-P leistocene-R ecent?
In it s sculpture, this species is closely allied to T?'it onalia(O cincb?'c ll'Us) adnnca ( SOWERByt ), but the formor has a "h ellwith less (6 to 7) prominent varices than the latter specics, which
however may be only an individual characteristic.
Oci?ubm falcat a of YOKOYAMA from tho upper Musasllino
formation clot ely agrees with the specimen from Manganzi.
SO W ERhY'S T?'itonalia fa lcataO Inay be a synonym of T?'itonalicL
ad7bnW SOWER BY.
•
T?·ito li alicL ·ba?·vm·ensis (GARB) ':l) is another form allied tothis sub -pecies, but 'P. ba?'bm'ensis (GARB) has a higher sh oll thanthe latter.
Antiplanes p e t' /:el'sa cont1"(,u 'ia (YOKOYAMA) (fig. 11)
J!J26 Plew'otema cardl'm' ia YOKOYAMA , J our. F ac. Sci. IlDp. Univ. T .. kyo, sec. 2, I,
(11
(3 1

un

Ill.
Tiles. Co ncLL, 4. p. 44, pI. 394.
GADB, Proc. Calif. Acad. S~ i , 3., p. ]83, (1 8G5) .
SOWERB Y, CUll.
SOWERBY.

._( 1O-[)-

7)3{,

Piioce nc .Mollusca from l\'Iallgallzi iu K otoll1o·mura , Akita. Pref. , Japan.

!J, p. 383, pI. 44, fig. 2 a, b .
1927 Plellr()torn(~ contraria YOKOYAMA, J our. F nc. Sci. Imp. U niv., T okyo, sec. 2,
2, 4, p . 166.
1935 A nt'ip lan's 7.:amchat·ica OTUK A, Bull. Eart b::]. R es. 1l1st . T okyo Imp . Ulliv. 13,4, p. 873.

Antiplanes pe?'ve?'S(~ cont?'a?'ia (Yo [{QY.-\lIH) is closely related
to A. lcamchatica DALL and A . pe?'ve?'sci (GA BB).
Antiplancs lcamchatica DAr~IY) haH a lower shell than A .
c o nt?'a?'i(~ YOKOYAMA, and A. pe?' ve?'sa (GABB) h as a high er sh ellt han YOKOYAMA'S specimen . Proportion of shell length a nd largest
diameter of these three f'p ccies ar c aR below. [List I]
Typ e lo cali ty: Manganzi, the Y uri series in Akita p refecture.
(Pliocene) .
Gcol. mnge: Pliocene (Omma suries , Ynri [:;e1'ie13, Takanosu
series).
A ll th ese species are ornamented with very fine striae which
are visible with a magnifying lens,List I.
A . kam chatim D ALL
A. p el'versa \ G AB B).A . contral'ia ( YOKOY AMA )
II
II
II
II
II

b eigh t (H)51mm
38 rum
27.4mm27 Illm
30 mm
26.4mm27.2 Illm
2L5mm

hrges~ di aru.

27 rum] I mm!J.2 m ru
8.6 mill
9.5=
8.6 m m
8.4mm8.7m]]}(D)

api cal ang leabou t 35°
a·bout :>0°
about 32°
abo ut 280
about 310
a bout 300
a bout 30°
a bout 30°;f* HI JIiJ{: I ]' 1X. H ~~~ )J]~i ~i: ft ID ~ 1r. T:i

D/H
0.53

0 29
0.34
· 0.32
0.32
0.33
0.31
0.31

ClI)~IJ:D:k ~HJ1m z JJJJ·~"'C ;f;ijJLIp.\( ± /;: J: -::::>"'C liJFyE-tt b ~1- t::;f::k rn 1',!f.rl'I ;fU ~mtj ,;ft;tJ ;u'~ !§jl c;'r&1 <:0 Jl. 1t ~ e:> 1ifFY'i: 7l' L- "'C<b ~ o :tii,*~ : 25 *111, &1 :±lmf : fMU ~t}W.:lj;:mf o il'ff\';: rl'Tll'jIE!'(';iJr*X o ~ JII I\b¥.*~*X e:> 1t ~c :;.ll::illi e:> t e:> ;;j' $-v' o Anadam satow i omma,])'!sis O TUKA )JC1.J~ Bitt·ill?n yo 7~ o?Jam ti
OTUK."

e:> iilljli)( 7l" it ~0(1 ) DAT, T" l'l'oc. U . S. Nat. Mus., 56. 2288. pp. 33-34, pI. ] 0, fi g . 1.
(2) GA 1313, Proc. Ca lif. An d . ScL, 3, p. 183, (1865).
-( 105 ) -

Y.OTUK A

736

Explan ation of Plates 41 (13), 4~ (14)Fig. 1a.
Fig. 1 b.
Fig. 2.

N'Ucula (NlLcu la ) nipo nica SlI1:ITH, outside view.
N-ucula (N'Ucu la) niponica SMITH, inside view of left valve.
Nucttla (N1tcula) n ipon-ica SlI1:ITH, outs idc view, specimen fr om
JliIanganz i.
Fig. 3.
Anadcwa satowi ommaensis OTUKA. po ;tel'iol' view.
Fig. 4.
Yol dia (Cnest e"illm) keppe liana notlluiiis Y OKO YA~L~, left valve,specimen frolll Maoganzi.
Fig. 5.
Yold ia (C 'leste'ril!m) keppeliana notabilis YOKOYAnfA, left valve,specimen from Hal'agama coast.
Fig. 6 a, b . JJ!Iel'c enal'ia Jjokoyamai MAKIYA~O[A, specimen from ::\Iangaozi.
Fig. 7 a, b. Pando ra (K enn e"zi a) bicar inata sJ.bsp ., specimen from Sagami
bay.
Fig. Sa, b. Anadara satowi ommctensis O'.rUKA, specimen from Omma
series a t Nagaya Dl'. Kanazawa.
Fig. 9.
l'·ritonalict (O c in ebl' el lw~) aclunca Subsp., sp . from Semata
P leistocene.
Fig. 10.
Panclo ra (Kenne1'lict) pltlchella YOKOY.HfA., specimen from
Manganzi.
F ig. II.
Antiplanes pe rve1'sa contral'ja YOKOYAMA, topotypc.
Fig. 12.
Bittiuln yokoyam,c!i OTUKA, holotype.
Fig. 13 a, b . T1'itonalia (Ocin eb l'ellus) adtmca subsp. speci men from Semata
Pleistocene.
Fig. 14.
(apical veiw ).
Fig. 15 a, b. l'ri tonalia (O cinebrelllls) C!c/llnca subsp . specimen from M a ngaDzi.

-( 106 ) -

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Constitution of the Palaeontological Societyof Japan.
Article 1. The Society shall be known as the Palaeontological Society of J apan.
It forms a section of the Geological Society of J apan .

Article 2. The object o f the Society is the promotion of palaeontology and related sciences.
Article 3. This Society t o execute the scheme outlined under Artic le 2, shall holdannual meetings and discussions.
Article 4. Proceedings of the Society and articles for publication sball be published through the Journal of the Geological Society of J apan. Separates and circulati ons will be sent to m embers of the l;'alaeontologicalSociety who are not members of the Geological Societ,y of J apan.
Article 5, The ulllllla l dues of this Society is two dollars for the foreign membersof the Society.
Article 6. This Societ,y shall hold the following execut ives. President one perSon,
Councillors several persons.
Article 7, The President and Councillors shall be elected annua lly. T be President and Counci llors shall be elected from the Society body by vot eof its members. All e lecti ons sha ll be ballot,

President

Shigeyasu TOKUNAGA

Councillors Ichil'O HAYASAKA

H al'uyosb i HUZIlIWTO*

T sunenaka IKI

Kinosuke INOUYE

No buyas u KANEHARA

T akeo K ATO

Rokul'O KIMURA

T eiichi KOBAYASHI"

Hanzo l\i[URAKAlIlI

Takumi NAGAO

Sb intaro NAKAMURA

Tuuet .'l"u OINOMIKADO*

Ichizo OJ\1URA"

Yanosu ke OTUKA"

I wao T ATEIW A

Shigeyasu TOKUNAGA"

H isakatsu Y ABE

Sbinj i Y AMAN E(* Executive committec)

All communicat·ions relating to th is Journal sho uld be addressed t o the
PALA EONTOLOGI CAL S OCIETY OF JAPAN

Geological Instit ute, Faculty of Science, Imperial University of Tokyo, J apan