HIPPONTX. Panama Shells. 217 



gular striae of growth ; without spiral striae : 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 ,46 inch ; breadth obliquely .31 inch. 



iStatidn. — ^Unknown. 

 Habitat. — Panama ; 0. B. A. 1 

 1 specimen was found. 



Family— OALYPTEJEIDiE. 



326. Hipponyx . 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 t 



Synonymy. 



Hipponyx barbata ? Sowb. in Proc. Zool. Soc. Lond. p. 6. Jan. 1836. 



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



26, 27. 1846. 



Our sheila 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 pihsm 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. 



TOLT, 185S. 65 Am. Lro. Nat. Hut. 



