CONCHOLOGY. 



57 



V. carneola. 

 V. petalina. 

 V. cornularis. 

 V. adspersa. 

 V, opima. 

 v. turgida. 

 V. flammiculata. 

 V. strigosa. 

 V. Perronii. 

 V. elegantina. 

 V. undulosa. 

 V. vermiculosa. 

 V. vulvina. 



V. marmorata. 

 V. Malabarica. 

 V. laterisulca. 

 V. subrostrata. 

 V. phaseolina. 

 V. Florida. 

 V. bicolor. 

 V. catenifera. 

 V. sinuosa. 

 V. rimularis. 

 V. ovata. 

 V. pumila. 

 V. inquinata. 



v. notata.* 

 V. praeparea.* 

 V. elevata.* 

 V. inequalis.* 

 V. castanea.* 



V. Nuttallii.* 

 V. staminea.* 

 V. Californica.' 

 V. lamellifera/ 

 V. Mortoni.* 



4. Genus Venericardia. PI. VII. 



Animal. Nearly as above. 



Shell. Suborbicular, inequilateral, equivalve, sides haviner 

 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. 



C0NCH.T3 FlUVIATILES. 



5. Genus Cvclas. 



Three Genera. 

 PI. VII. 



Jlnimal. 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 



