Zoological Society. 55 



Semipellucid Cowry. — Shell ovate, of a beautiful semipcllucid 

 white colour, shining; the ribs— anterior, posterior and dorsal — ter- 

 minate in teeth on both sides and ends of the aperture, and traverse 

 the columellar groove to its inner edge ; a few ribs do not continue 

 over the dorsum ; the teeth, even, fine, and numerous, about thirty 

 on the lip ; columellar groove, deep and broad ; base round ; margins 

 wide ; no dorsal impression ; extremities much produced, and obtuse ; 

 aperture straight, except a slight curve at its posterior extremity. 



Size Yo 8 o tns °f an mcn » 



Hab. South Pacific. 



Cab. Gaskoin, &c. 



Differs from cxigua of Gray, the trcmeza of Duclos, in being less 

 gibbous, ribs more numerous, finer, more even and regular, and but 

 two or three terminate on the sides of the shell, none on the dorsum ; 

 they pass continuously over the shell from one side of the aperture 

 to the other ; shell perfectly colourless, and has no dorsal line or 

 impression. 



Cypilea Pisum. Cyp, testa spheroidali, pallescente ; costellis pro- 

 mincntibus, ex aperturd ad lineam dorsalem decurrentibus, et in 

 lineam attenuatam terminantibus ; dentibus prominentibus ; sulco 

 columellari lato ; aperturd latiusculd postice flexuosd ; basi rotun- 

 datd; margine externa incrassato, supra extremitates extenso ; 

 extremitatibus crassis ; lined dorsali profundd, ex extremitatibus 

 posticis ad anticam testa partem continud. 

 Pea Cowey. — Shell spheroidal, of a very light fawn colour ; ribs 

 large and prominent ; nearly every rib extends from the aperture and 

 terminates generally, tapering to a point, at the dorsal depression ; 

 mostly the terminations on one side pass between those of the other, 

 especially on the anterior half of the shell ; each third or fourth rib, 

 amounting to about seven, ends on the lip at the base of the shell ; all 

 the other ribs on both sides form, by continuance, the teeth, which 

 are strong and prominent; about twenty-three on the columellar 

 side of the aperture, which extend across the columellar groove and 

 serrate its inner edge ; those on the outer side or lip about twenty- 

 one in number ; columellar groove broad and deep ; aperture rather 

 wide, curved, particularly at the posterior portion; base round; 

 margin on the outer side very thick, extending over the beaks ; none 

 on the columellar side; extremities or beaks obtuse, thick, and 

 slightly produced ; dorsal depression deep, extending from between 

 the posterior extremities to the anterior end of the shell, being more 

 deeply impressed beside the apex. 

 Long, y^ths of an inch. 

 Hab. East Indies. 

 Specimen unicum. Cab. Gaskoin. 



The characters of this shell are so distinctive that it bears no re- 

 lation to any yet described Cyprcea ; it is nearest in form to Cypnca 

 formosa of Gaskoin. 



CyprjEA Pulla. Cypr. testa ovatd, nitidd, fusco-rubescente, cos- 

 tellis dentibusquc concoloribus ; costellis usque ad lineam dorsalem 



