Notes on Species of Corbiculadee. 



67 



The shell is small, orbicular-trigonal and somewhat inflated. 

 The posterior side is obtuse. The beaks are small, 

 and they curve inwardly. The striae are close and 

 regular. The lunula is distinct and oval. The inte- 

 rior of the valves is pale violet. The hinge is nar- 

 row. The epidermis is yellowish and polished. 



Compared with Corb. radiata, this species is less 

 globose, not so inflated, the beaks are not so tu- 

 mid, the strise are closer, and the color of the epi- 

 dermis is different. 



This interesting species was brought from Africa by John 

 Kirk, M.D., of Edinburgh, to whom I take great pleasure in 

 dedicating it. Dr. Kirk accompanied the Zambesi Expedition 

 sent out by the British Government, in the capacity of medical 

 officer and naturalist. I am indebted to Mr. Isaac Lea for 

 being able to describe this species. 



Corb. Kirkii. 



Fig. 13. 



11. Corbicula brunnea, Prime. 



Corbicula brunnea, Prime. Acad. N. S. Phil. Proc. 126. 1861. Prime Cat. 3. 



1863. 



C. testa ovato-transversa, sequilaterali, solidiuscula, subinflata ; latere 

 antico rotundato, postico obtuso ; regnlariter striata ; 

 epidermide nitente, fusceseente vestita ; umbonibus 

 parvulis, integris, apiculatis, incurvis, violaceo radi- 

 atis ; margarita violacea ; cardine incrassato ; lunula 

 ovato-lanceolata. 



Long. 22 ; lat. 19 ; cliam. 12 mill. 



Hob. — In flumine Scamander insulae Tas- 

 maniae. Collect. Prime. 



The shell is equilateral and not much infla- 

 ted ; the anterior margin is rounded and the 

 posterior margin is obtuse. The beaks are 

 small, apiculated, they curve inwardly and are corbicula brunnea. 

 radiated with violet. The interior of the valves is violet. The 



