JSFotes on Species of the Family Corbieuladce. 415 



tumidis, brevibus ; valvis intus violaceo-rubris ; cardine angusto; 

 lunula ovato-lanceolata, pallida. 



Long. 22 ; lat. 17 ; diam. 12 mill. 



Hab.—I Collect. Prime. 



The shell is transversely-oval, somewhat compressed, and 

 nearly equilateral. The anterior side is subangnlar, and the 

 posterior is subtruncated. The epidermis is yellowish-green 

 and polished, and has markings of dark violet on the beaks. 

 The beaks are small and somewhat raised. The interior of the 

 valves is dark purplish violet. The hinge is narrow. The 

 lunula is distinct, and of a lighter color than the rest of the 

 shell. 



Comparing it with Cork, occidens from India, with which it 

 is closely allied, we find that the beaks are smaller, and that 

 the hinge is slighter ; the main difference, however, consists in 

 the fact, that in Corb. mediocris the anterior side is distended 

 and angular, whereas in Corb. occidens it is rounded. 



48. Corbicula Laniaudieri, Prime. 



Corbicula Larnaudieri, Prime. Annals N. Y. Lyceum Nat. Hist., vol. vii. 480- 

 1862. Prim. Cat. 3. 1863. 



C. testa parvula, ovato transversa, 

 inaequilaterali,convexiuscula ; utraque 

 extremitate rotundata ; epidermide 

 flavescente-viridi vestita, ad umbones 

 atro violascente maculata ; striis regu- 

 laribus distantibus ; umbonibus brevi- 

 bus, turgidulis, incurvis; valvis intus 

 violaceis ; cardine angusto ; lunula 

 ovato-lanceolata, pallida. 



Corbicula Larimuuiuri. 



Long. 13 ; lat. 11 ; diam. 7 mill. 

 Hah. — Siam. Collect. Prime. 



