94 



striae (becoming tuberculated anteriorly) of which the 

 longitudinal are the more prominent; lunule indistinct; 

 inside glossy white or yellowish, purple about the car- 

 tilage; two of the teeth cloven. 2. ..3. Common on 

 Sandy Coasts. 



V. PULLASTRA. Pen. 4. p. 210. Lam. 47. Lin. 

 T. 6. t. 17. /. 13,4. and vol. 8. p. 88. t. 2./. 7. 

 Mont. p. 125. Dor. Cat. p. 36. t. 1. /. S.Turt. 

 C. D.p. ZH.Turt. B.p. VENERUPIS P.^. 451. 

 V. SENEGALENSIS. D. p. 206. Oblong, anteriorly 

 subangulated, reticulated by fine striae, of which the 

 concentric are the more apparent and become sublamel- 

 lar anteriorly, white, with purple blotches (rarely grey 

 with dark rays) ; lunule rather obscure ; middle tooth 

 cloven. 1...1. Common. 



TRIBE. CARDIACEA. 



Having irregular cardinal teeth, both in form and 

 situation : usually with one or two lateral. 



GENUS. CARDIUM. 



Equivalve, subcordiform ; beaks prominent ; inner 

 margin of the valves denticulated or plicated ; hinge 

 with four teethin both valves, two approximated ob- 

 lique, cardinal teeth mutually inserted and crossing 

 each other and two remote lateral. 



