232 Notes on Species of Corbicvladw. 



vulis ; ligamento crasso ; striis irregularibus ; epidermide nigro-vires- 

 cente vestita ; valvis intus albis inferne posticeque purpureo-violaceis ; 

 cardine crasso, lato ; dentibus lateralibus subjequalibus, elongatis. 



Long. 83 ; lat. 74 ; diara. 43 mill. 



Hab. — Nova Caledonia. Collect. Cuming et Prime. 



The shell is oval, orbicular, obliquely inequilateral, ventri- 

 cose, heavy, and solid. The anterior side is rounded, the pos- 

 terior is broader and obtuse. The beaks are small. The liga- 

 ment is broad. The striae are irregular and coarse. The epi- 

 dermis is greenish black. The interior of the valves is white, 

 with purplish violet markings on the inferior and posterior mar- 

 gins. The hinge is thick and broad. The lateral teeth are 

 subequal in length and narrow. 



Compared with Batissa lenticularis, it is larger, more tri- 

 gonal, less equilateral, and the beaks are less inflated ; moreover 

 the epidermis is coarser, darker, and less polished. 



Genus CYEENA. 

 7. Cyrena ITlorchiaiia, nov. spec. 



C. testa ovato-transversa, subtrigona, valde injequilaterali, ventricosa ; 

 latere antico brevi, rotnndato, postico elongate-, obtuso ; umbonibus 

 minimis, approximates, incurvis; striis obsoletis ; epidermide viridi, fus- 

 cescente vestita ; valvis crassis, intus albis ; cardine crasso. 



Long. 94 ; lat. 67 ; diam. 54 mill. 

 Hal.— % Collect. Lea. 



The shell is transversely-oval, subtrigonal, very inequilateral, 

 and ventricose. The anterior side is short and rounded, the 

 posterior is elongated and obtuse at end. The beaks are very 

 small, approximate, and they curve inwardly. The striae are 

 obsolete. The epidermis is brownish-green without polish. 

 The valves are heavy, the color of the interior is white. The 

 hinge is broad and strong. 



