HIPPONYX. Panama Shells. 217 



gular striae of growth ; without spiral strife : apex minute, 

 obtuse, prominent : whorls two, very convex, with a well 

 impressed suture ; last whorl very oblique, much inflated and 

 very convex : aperture contracted, yet exhibiting the spiral 

 columella to the apex ; columellar side of the aperture abruptly 

 arcuated. 



Length obliquely .45 inch ; breadth obliquely .31 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 

 1 specimen was found. 



Family CALYPTR^EID^. 

 326. HippOIiyx . Sp. indet. 



We found of this species only 2 small specimens, which pro- 

 bably are immature. The spire has more than two whorls. 

 They may be the young of Hipponyx subrufa Sowb. Lam. ? 

 The Lamarckian Pileopsis subrufa is probably the Caribbean 

 species, of which Mr. Sowerby's species is the Pacific analogue. 



327. Hipponyx barbata I 



Synonymy. 



Hipponyx barbata ? Sowb. in Proc. Zool. Soc. Lond. p. 5. Jan. 1835. 

 -? Sowb. Thes. Conch, p. 369. No. 1. pi. 73. f. 



26, 27. - 1846. 



Our shells correspond very nearly to the description and 

 figures by Sowerby. Yet they may be distinct. It will be 

 seen that they belong to a distinct zoological province. Our 

 specimens also resemble Pileopsis pilosus Desh. in Guer. May 

 1832, pi. 19. 



Station. On stones and shells near low water mark. 



Habitat. Ad Insulas Maris Pacifici. Found on coral reefs 

 around Toobouai, one of the Society Islands ; 

 Cuming ! Sowerby. 



JULY, 1852. 15 ANN. LYC. NAT. HUT. 



