﻿SPH^RIUM.— Plate II. 



middle, sniootli at the sides ; anterior side short, 

 a Httle cornered at the dorsal margin, truncated 

 at the side ; posterior side produced, obliquely 

 truncated. 



Whitmoke. MS. Mus. Brit. 



H.jh. ? 



Species 17. (Fig. a, b, c, and d, PI. V. Mus. Brit.) 



Sph^RIUM coeneum. Sj'Ji- testd Irei-Her amtd, tiuiiidd, 



snlmtlindd, fi'"'-,': rd Jhtridn. ,jr;sr,i-fit^r!ati1 . nA 



aiindd; uinho„;i.„.< „/,/»'./,., „„-,,:,;„. ,/,„>.-/; ,d,-;,„i„r 



declivi ; marijl uihuslati: ruUli a^ulit ti^ii^si III!: i r u ncid 1^ . 



The hoknt Sph^eium. Shell shortly ovate, tumid, 

 rather round, brown or yellow, or banded 

 with grey or whitish ; umboes obtuse, dorsal 

 margin sloped on both sides ; lateral margins 

 very obtusely truncated. 



LiNNSUS (Tellina cornea.) Syst. Nat. 



Cyclas Tvvalis. Draparnand. 



Hidi. Great Britain, Europe generally. 



Species 18. (Mus. Brit.) 



Sph.«rium Teeveeianum. Sp/i. testd suhghhosd, ultd, 

 ad apicevi coriied,, fere, mnniru) casianed; latere 

 luitici) ante umhones excavato ; umhonibus promi- 

 neiitihiis, latere poslico injiatu, margine dcrrsali 

 declivi. 



Tekvek's Sph^erium. Shell rather globose, high, 

 homy at the apex, chestnut nearly all over, 

 anterior side excavated in front of the umboes ; 

 umboes prominent, posterior side inflated, dorsal 

 margin sloped. 



DuPUT. Extr. Ga 

 Hah. France. 



Test. 87, 1849. 



Species 19. (Mus. Brit.) 



Sphlseium consobeinum. Sph. testd compressd, suh- 

 quadratd, IcBvigatd, corned; latere antico Irevi, 

 depresso ; latere postico sulexpanso; margine 

 dursali elevato, marginibus lateralibus ventralique 

 ■rectiuscuUs ; umbonibus parvis, acutis. 



The related Sphjirium. Shell compressed, sub- 

 quadiate, smooth, horny ; anterior side short, 

 depressed ; posterior side rather expanded ; 

 dorsal margin raised, latei-al and ventral margins 

 rather straight ; umboes small, sharp. 



Caillaud. Voyage de la Meroe. 



Hah. Pyrmont. 



A smaller species than iS^j/t. eahjculatum, resembling 

 it, but without the calyx-shaped tubercle. 



Species 20. (Mus. Brit.) 



Sphj:rhju occidbntale. Sph. testd subcompressd , 

 ovato-subquadratd, corneo-flavesconti, Icevigatd ; 

 lateribus subtruneatis, margine dorsali niitim 

 declivi, postico pauV) elevato. 



The Western Sphjieidm. Shell rather compressed, 

 ovato-snbquadrate, yellowish, homy, smooth : 

 sides a little truncated, anterior dorsal margin 

 sloped downwards, posterior a little raised. 



Prime. MS. Mus. Brit. 



Rab. Montreal. 



