Mollusca in the Collection of the Zoological Society. 361 



dd, IcBvi, lateribus et margine inferior e striatis ; long. l-j%, laL \-^q, 

 alt. \-^, poll. 

 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 oblongd, striatd, antice rotundatd, postick subacuminato-rostratd ; 

 long, ^0, lat. y%, alt. iV? 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. 



*CoRBULA GIBBOSA. 



C. testd obovatd, (squivalvi, valvis gibbosisy Icsvibus, postice bicarinatis; 

 epidermide corned; long. ■^■^, lat. ^%, alt. -fo-, 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. 



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

 tibus in utrdque valvd duobus^ acutissimis ; epidermide corned ; 

 long. 1-jS^-, 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, ovato-oblongd, aMick angusliore ; long, l-j^^, lat. 

 W, alt. yV, poll. 

 Hab. in Oceano Boreah. 



