82 



Notes on Species of Corhiculadce. 



but somewhat coarse. The epidermis is yellow. The lunula is 

 not very distinct. The valves are comparatively solid and heavy. 

 The interior is white, with chestnut markings on the muscular 

 impressions. The hinge is broad and curved. The teeth are 

 strong and broad. 



Comparing this species with CorMcula trigona, we find that 

 it is more trigonal, less transverse, more solid, the posterior 

 side is less produced, the beaks are not so acute, the strioe are 

 coarser, and the coloring is different. 



Genus BATISSA. 

 1. ISatlssa solidula, Prime. 



Batissa solidula, Prime. Proe. Zool. 1862. — Prime Cat. 5. 1863. 

 B. testa ovato-orbiculari, subsequilaterali, compressiuscula ; latere 



Batissa solidula. 



antico productiore, rotundato, postico abrupto, obtuso ; valvis solidis, 

 intus albidis, ad raargines violaceis ; cardine incrassato, dcntibus cardi- 



