40 



Iwliinil the iiit4TViilM uix' nhort |ioiiii-iuliciilar lino«; iiniUiiitti lii;;)i, toncliiii}; oik- 

 iiimtluT, limiiln' hrojul ; aiit<'iior sitlf iiiirnnvi'r mid ruiiiuliNl, |iii!<t«Tii»r one hn»iul 

 :iiitl i>lilii|iicly triiiuiiteil ; Iowit iimn^iii civiiiilat«-)! ami ii|i|n-i' inan^iii not iiiiicli 

 fiinvox ; - liiful liiiijie-ltvtli in tlie riglit vulvo, oni' I'iliil t«»f>lli in ihr Ii>lt vnlvc. 

 'I'liis and tin- li^nrc Usuc« no doulil aUmt tin; duU-rntination <>(' \h\n ^kv'wh, 

 wliitli was toK-nilily ficijurnt at Oji, lint mostly Inulnn-«!. 



Till' largest 8|)0<-inu'ns have 70 nnn. in lcii;;lli and (»O in li<'if;lil.— TIk" 

 •rcniis i.i dcnoininatfd luxonling to (inuld's Ktattinoiit in liix Index (Otiil ('oneli. 

 |i. 'I'tG) in sjiite of tlic crennlatod nla^^in, Ihmiusc all tlie other chamctt-n« ajji^M- 

 with thos»' of TajH's. The siH-t'ie« hiu» also U-en foinul livinj; at Hakodat«-. 



Siixiilminiit im i-]iin<iliis. Sowerliy. I'l. V. f. 20. 



(TIk-s. Coneh. V.*: -2, \>. f.'.IJ, y\ irx), f 1-24 and 12r».-IMi.iyi*, Cutal 



of eonehifeni of Brit. Miis. p. ISS.— Adams, Ann. Mii«?. Nat. Hist. ISfi'.l, 



vol. :^. p. 235.-Li8chke, .lapan. Moor.'s-Com-h. v. 1, p. 127, t. 9. f. 4 * r..— 



Syn S. Niittalli Schreiuk, Nordjap;in. Moll, p 2r»3, and S. ^^i^ranteiis 



Martens, prenss. ICxikuI. ii. Ost-Asieii, Zool. vol. I. p. 140). 



As Lischkc nndonlitodly is rijjlit in identifyiu;ij this 8|Mx;ieH with the figure 



an<l «h-seription given by Sowerliy, I follow him in omitting a c-om|tari.*uin with 



(ioiiltl's sjieeies from the racifie coast of Ameriea. though it is ipiite |»i>Ksili|c 



that one— if not more — of the l.itler are iilenlieal with the shell \Nliii:li Iuik ln-en 



descrihed from Jaiian, Tokio as well ns Hakodate, und whi>-h most likely oo'in°M 



in many more jdaces of the Japaiu-w.^ coiusIh. List:hke's Biip|>ositioii. KiinulH-)* 



to \h: in fiU't a .Ta|>!ine.se, not an Imlian locality, seems to In- eonllVmeil hy t-inii- 



lar names (Hvnrring in .lajian. The sinTimens foinid not nnl'n-<|nently and of 



largo size ( 105 mm. hy 80 nnn. I at Oji, e.xhiliit the jNisti-rior hilid trwith of the 



right v»lve and the de«>p pallial sinns, which seem to iiwlimt«^ that SaxidonniH i« 



more akin to Ta|ies than to Venns pro|ier; the eoni-entricjil stri:e are niinu-roiis 



and sharp, the jtostt-rior side Ls long, very ohtu.sely curinate«! and more rontide«! 



tliaii truncated. The iiilerior margin is smooth. 



Venu» (Mercentirio) >Stimp»oiii (io\M. I'l. \'. f. 21. 

 ((Mia Conch, p. lliO ). 



This llakmhite s|N-vie8, wiiich I coiiM coin|»are directly with antli. iiii<;ii >^m■^ 

 ciineiis from that lo«vlity, has Urn fonml only once in a lomplde and largn- 

 sjieeinien at Oji. The ohliipie shell with th<- nente nnlK>ne« phui^l near tli» 

 anterior eritl, ilei'p lunula, convex doi-sal margin, |Kiintet| |i<isteiior end, with 

 liroad hiii<;e, shallow {Killial sinns an<l nnnieioii.« i-oneeiitrical lamin.'c, nx'iutnrefi 

 ".»7 liy 7S millim. (Htvent 8|K-eimens re.-uh 10.'» hy 87 nnn.) Smaller s|t<<inieii8 

 and fn^;meiit.s have lieen foimd in tolemhly large nninU'r: liny nie.isniv nmstly 

 almiit 1.'» Iiy 12. .I millim. and have the shape of the l.irgei : the ninlNinev are 

 |(liiee<l at 4.<i millim. from tlu- ant«'rior end, the snrfare is eovere«! with foliaco- 

 oiM conrentricikl ril»:: the intervals nro broad and Inngitiidiiutlly «triiite.!. The 

 marginal crcnnlation is always sharp an<l fine. 



