Notes on Species of Corhieuladce. 



GO 



Fig. 15. 



The shell is transversely oval, subtrigonal, nearly equilateral, 

 not very solid and somewhat compressed. The 

 anterior margin is rounded and the posterior one 

 somewhat obtuse. The beaks are full, but not 

 raised, they are very generally eroded. The 

 strise are nearly obsolete, and when visible, irre- 

 gular and somewhat distant. The epidermis is 

 very highly polished aud varies from greenish- 

 brown to blackish-brown, or even black ; it is 

 lighter in the young specimens. The lunula is 

 very indistinct. The hinge is rounded and some- 

 what strong. The interior of the shell is pale 

 violet. 



This is an attractive species, and is quite remarkable for the 

 high polish of the epidermis. 



We are indebted for the discovery of the Corb. Japo?iica to 

 Mr. Gulick, who seems to have found it in great abundance. 



Corb. Japonica. 



14. Coi'bicula Lainarckiana, nov. spec. 



C. testa ovato-transversa, valde inequilateral), compressa ; latere an- 

 tico rotundato, postico longiore, subobtuso ; umbo- F 16 



nibus parvulis, depressis ; cardine lato, incrassato ; 

 ruargarita lilacina ; regulariter et dense striata ; 

 epiderniide fuscescente vestita ; ligamento elongate- ; 

 lunula nulla. 



Long. 24 ; lat. 18 ; diam. 10 mill. 



Bob.— Montes Laos, Cambodiae. Col. Prime. Corbicula La ™ r cklana - 



The shell is transversely-oval, very inequilateral, the posterior 

 side being much the longer, and it is quite compressed. The 

 beaks are small and obtuse. The ligament is elongated. The 

 strise are regular and very close, they are not raised, though 

 perfectly distinct, and becoming somewhat obsolete as they 

 approach the inferior margin. The epidermis is light brown 



