52 



CONCHOLOGY. 



C. Hebraea. 

 C. tigerina. 

 C. ornata. 

 C. umbonella, 

 C. castrensis. 

 C. picta. 

 C. scripta. 

 C. mixta. 

 muscaria. 

 C plicatina. 

 C. dentaria. 

 C. nodulosa. 

 C. cuneata. 



C. mactroides. 

 C. concentrica. 

 C. sulcatina, 

 C. interrupta. 

 C. punctata. 

 C. undatina. 

 C. gibbia. 

 C. macrodon. 

 C. testudinalis. 

 C. rugifera. 

 C. aspergata. 

 C. squamosa. 

 C. cardilla. 



3. Genus Vemis. 



Jlnimal. As above. 



Shell. Solid, thick, regulai-, perfectly equivalved and close, 

 more or less inequilateral ; summits well marked and inclined to 

 the front ; hinge subsimilar ; the middle cardinal tooth forked, or 

 three cardinal teeth more or less contiguous and convergent towards 

 the summits ; ligament thick, often arcuated, convex, exterior ; two 

 distant muscular impressions ; cordiforro depressions beneath the 

 beaks. Inhabits the British seas. Ninety living species. Nine 



Venus reticulata. 



V. rugosa. 



V. corbis. 



V. crebiscula. 



V. discina. 

 V. cancellata. 



V. marica. 

 V. sulcaria. 

 V. cardivides. 

 V. texturata. 

 V. elliptica. 

 V. rariflamma. 

 V. mercenaria. 



Venus floridella. 

 V. aphrodina. 

 V. pulchella. 

 V. aphrodinoides. 

 V. tristis. 

 V. flammea. 

 V. puerpera. 

 V. verrucosa. 

 V. pygmsea. 

 V. casina. 

 V. crenulata. 

 V. plicata. 

 V. granulata. 



