36 POST-PLEIOCENE FOSSILS. 



centric, lamelliform, elevated, recurved, with elevated transverse striae on the inferior side 

 of each ; lunule cordate, laminated, crenulated on the buccal and pallial margins within, 

 crenulations extending from beak to base of anal margin; teeth divaricate, unequal, 

 triangular. 



This shell is sometimes found living on the coast, but very rare in the Post-Pleiocene. 



Plate VI. Fig. 15, Natural size. 



Locality. Artesian Well, Charleston ; Simmons'; Abbapoola. 



Museum, College of Charleston; Cabinet F. S. H. 



Genus, CALLISTA.— Poll 



CALLISTA GIGANTEA. 



Plate VII. Fig. 3. 



Venus gigantea, Gmel, p. 3282. ■ 



Venus gigantea, Chemn., 10, p. 254, t. 171, fig. 1661. 



Venus gigantea, Dillwyn, Cat., Vol. 1, p. 202. 



Cytherea gigantea, Wood, Index, pi. 8, fig. 100. 



Cytherea gigantea, Lam., An. sans Vert., 2d Ed., Vol. 6, p. 302. 



Callista gigantea, Adams, Gen. Recent Shells, Vol. 2, p. 425. 



Description. Shell large, ovate, smooth, polished, very inequilateral; buccal side short, 

 rounded; anal side produced, sub-angulated ; lunule ovate, impressed, keeled in the 

 middle. In the recent state, it is prettily coloured with numerous bluish longitudinal 

 rays. 



This fine shell is often found in the Post-Pleiocene, and seems to have flourished during 

 that period ; it is living on the Carolina coast in deep soundings, but the shells are seldom 

 found on the beaches. It is common on the Florida shores. 



Plate VII. Fig. 3, Shell, natural size. 



Locality. Simmons'. Museum, College of Charleston; Cabinet F. S. H. 



