56 



CONCHOLOGY. 



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 ; cordiform depressions beneath the 

 beaks. Inhabits the British and American seas. One hundred 

 living species. Nine fossil. 



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. 

 V. pullastra. 

 v. gallina. 

 V. truncata. 

 V. pectinula. 

 V. anomala. 

 V. lamellata. 

 V. exilis. 

 V. rufa. 

 V. Scotica. 

 V. hiantina. 

 V. virginea. 

 V. corugata. 

 V. ovulaea. 

 V. papilionacea. 

 V. callipyga. 

 V. punctifera. 

 V. nebulosa. 

 V. literata. 



Venus floridella; 



V. aphrodina. 



V. pulchella. 



V. aphrodinoides. 



V. trislis. 



V. flammea. 



V. pucrpera. 



V. verrucosa. 



V. pygmaea. 



V. casina. 



V. crenulata. 



V. plicata. 



V. granulata. 



V. pectorina. 



V. cingulata. 



V. textilis. 



V. grisea. 



V. geographica. 



V. Dombeii. 



V. decussata. 



V. lagopus. 



V. glandina. 



V. gallinula. 



V. retifera. 



V. sulcata. 



V. galactites. 



V. exalbida. 



V. scalarina. 



V. dorsata. 



V. aurea. 



V. crassisulca. 



