CONCHOLOGY. a4 
V. carneola. V. marmorata. 
V. petalina. V. Malabarica. 
V. cornularis. V. laterisulca. 
V. adspersa. V. subrostrata. 
V. opima. V. phaseolina. 
V. turgida. V. Florida. 
V. flammiculata. V. bicolor. - 
V. strigosa. V. catenifera. 
V. Perronii. V. sinuosa. 
V. elegantina. V. rimularis. 
V. undulosa. V. ovata. 
V. vermiculosa. V. pumila. 
V. vulvina. V. inquinata. 
V. notata.* V. Nuttallii.* 
V. preparea.* V. staminea.* 
V. elevata.* V. Californica.* 
V. inequalis.* V. lamellifera.* 
V. castanea.* V. Mortoni.* 
4. Genus Venericardia. Pl. VII, 
Animal. Nearly as above. 
Shell. Suborbicular, inequilateral, equivalve, sides having 
usually longitudinally rayed ribs ; hinge with two oblique cardinal 
teeth in each valve, turned in the same direction. Five living 
species. ‘Ten fossil species. 
Venericardia Australis. Venericardia flammea. 
V. imbricata. V. Tankervillii. 
V.. crassicosta. 
Concum Fuvuyratites. Three Genera. 
5. Genus Cyclas. Pl. VII. 
Animal. Body oval, thick ; edges of the mantle simple ; tubes 
short and united; foot wide, compressed at base, and terminated 
by a sort of leg or appendage. 
The shells of this genus are very small, found buried in the 
