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 areuated, 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. 
. discina. 
. cancellata. 
. marica. 
. sulcaria. 
. cardivides. 
. texturata. 
a<d<< 
. elliptica. 
. rariflamma. 
mercenaria. 
. pullastra. 
gallina. 
. truncata. 
. pectinula. 
. anomala. 
. lamellata. 
. exilis. 
. rufa. 
Scotica. 
. hiantina. 
Eke ee ee ce ee 
= 
. Virginea. 
V. corugata. 
V. ovulea. 
V. papilionacea. 
V. callipyga. 
V. punctifera 
V. nebulosa 
V. literata 
Venus floridella. 
V. aphrodina. 
V. pulchella. 
V. aphrodinoides. 
V. tristis. 
V. flammea. 
V. puerpera. 
V. verrucosa. 
V. pygmea. 
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. 
