42 



who 1. c. gives tlic averaj^e of tlic projxirtioa of length U> liei^ht in the recent 

 hhdls as O.039, in the chclls from tlie nionnds lus ().ItJ2. The Dji sholld have a 

 range in lliis resjuvt from 1 dnwa to .027, wliich may incliulo almost any jni>- 

 jioriions ohservod anywhere. At least I found only »ime of the bo calleil 

 1'. Troscheli going down a little lielow 0.K2. An for the nizc, it is quite true 

 that the (Jji sliells smpiips as well the recent as tlie mound sjK'cimens, and not 

 rarely liave 80 nun. of di:inieter, or SO of length to a little less height. lUit a« 

 tlie numlxjr of 8jK.eimeiia measua-d hy Morse is fo very small (10 recent and D 

 niound-siKJcimens), es[iecially when eoin|iaie.l witli the many hundre«!» dug out 

 at 0)1, this fact lose.-, very mueli of its im|>ortnn(e, and scarcely juslifK'S any 

 conclusion on a grailual diiuiimtioti of lln- size uf ilii^ s|ii-i-ics wliich. :it first 

 sight, it seems to sM|>iKirt. . 



Indeed, an examination of the Tokio collix-tions of recent shells gave, at its 

 very In-ginning, the ma.xinuim length of recent Dosinise (Uitli labelled as 

 i>. TroK'lieli and .is 1). .I:v|H.)nic;) e<ir.al to 7r>-77 inillim., the height heing in the 

 lirst case, ecjual in the length, viz. 75 millim, in the second 71, (r.itio of height 

 to length Ijeing als>ut 0.92). 



Caydluw Culi/ontieiiae Deshayes. 



(Revue i>ar la Soc. Cuvier. IS.^I». ji. 3üO.— .Miildendoifl', MahieozjKil. llos- 

 sica, vol. :i, |i. 40, i.l. I'l, f. 23-2").— lii-ehke, Japin. Meeav-Conch. v. ], 

 I'. 144, and v. 2, j>. 125.— Syn. (.'. hlundnm tionld. Otia Conch, p. 83. 

 iiiid At!. Wilkes M: pi. E.\p. pi. .'6, f. 534. Syu. also C. jiseudofossile 

 Heeve, iVmch. Icon. L'ar.liuin, pi 10. f. 52.). 



The ntiinero'is lihs (cifteii 4<<) an' sepir.ite«! hy r.^uTow intervals and crosseil 

 liy Icelile, unilnlaling coneenlriiMl lines; the shell is nearly «<jnilateral and 

 hut slightly elong.ited. Most of the s|>ecimens of Oji have less than 17 mm. 

 in length nml 15 in height; oidy one is considerahly larger, hut hroken. They 

 are not very iir.men.tis, and do nut allow any st'iious approach to the ques- 

 tion ahout the relation of this sjiocies to C. Islandicum l.inne (Syst. Nat. 12th 

 eil. p. 1124; Oould-Binney, Hep. on Inv. of Mas-s. p. 139l, with which Gould 

 in the Otia «leclarcs it to he analogoup, tuiil to which it seems quite akin. 



C'aiiliiim mutirttrn Reeve. 

 (Conch. Icon. Cardium, jil. G, f. 32.— Li.>»cld{e, JajMU. Meeres-Conch. vol. 

 I, p. 144.— Syn. C. jajKinicum Hunker, Moll. Japon. p. 28. pi. 3, f. 16.). 



According to I.i.«chke. this sjiccies is not synonunous with C piiiyr.iceum 

 Clicmn., Condi, cah. vol. G. j.. 190. pi. 18. f. 184, though SciiR-nck (Nord Jap. 

 M.ill. p .")I7l unites them. .\t all events I can confirm one of the 8tjit4.-mentii 

 given liy Lischke, viz. that C. muticuui, a largo, comi)ar\tively thin-shclle 1 siwcie« 

 with somewhat hroid ril»8 and intervals, is always a little transversely elongated. 

 The largest of the «mbroken sjiecimcns (which are far fmm U-ing fnvpient I. has 

 75 millim in height, and 85 in length. Tiny arc obliquely elougJitwl In-hinil. 



