Mollusca in the Collection of the Zoological Society. 3(51 



dd, IcBvi, lateribus et margine inferior e striatis ; long. 1-jS^, lat. \^\, 

 alt. Iy%,PoII. 

 Hab. 



There is nothing peculiarly remarkable in the aspect of this shell, ex- 

 cept the depth of the valves, which gives it a more globular appearance 

 than is usual in the species of this genus. In Mr. Bland's Collection. 



*C0RBULA ROSTRATA. 



C. testd ohlongd, striatd, antice rotundatd, postice suhacuminato-rostratd ; 

 ^ong. Y%, lat. t\, alt. ,V, poll. 

 Hab. 



The two valves are nearly equal : a thin horny epidermis covers the 

 shell, except near the umbones, where two diverging dark red rays are 

 observed to commence. In Mr. Bland's collection. 



*C0RBULA GIBBOSA. 



C. testd obovatd, aqriivalvi, valvis gibbosis, Icevibus, postice bicarinatis ; 

 epidermide corned; long. ^V, lat. \%, alt. -j-V* poll. 

 Hab. in Oceano Arctico. 



The two valves of this singular Corbula are very nearly equal, and 

 both are remarkably gibbous. The only specimen we have seen is of a 

 chalky whiteness ; the thin, horny epidermis only remaining near the 

 margin. We apprehend it is a dead shell. From Icy Cape. In Mr. 

 Sowerby's collection. 



SOLEN ACUTIDENS. 



5. testd lineari-ovali, medio coarctatd, albidd, umbonibus erosis, den- 

 tibus in utrdque valvd duobus, acutissimis ; epidermide corned ; 

 long. \-^Q, lat. ^, alt. y%, poll. 

 Hab. in Mari Sinensi. 



Approaches S. Dombeii in form and general appearance ; but it is 

 more linear, and is remarkable for the length and sharpness of the curved 

 teeth. 



*SoLEN TENUIS. 



S. testd albidd, tenui, ovatn-ohlongd, antice angustiore ; long. I-^-q, lat. 

 tV, alt. ~\, poll. 

 Hab. in Oceano Boreali. 



