38 POST-PLEIOCENE FOSSILS. 



This shell is now living on the coast of South-Carolina. 

 Plate VII. Fig. 5. 

 Locality. Simmons'. Cabinet F. S. H. 



Genus, PETRICOLA.— Lam. 



PETEICOLA PnOLADIFOEMIS. 

 Plate VII. Fig. 6. 



Petricola pholadiformis, Lam., An. sans Vert., 3d Ed., Brux, Vol. 2, p. 554. 



Petricola pholadiformis, Sowerby's Genera, pi. Petricola, figs. 1 and 2. 



Petricola pholadiformis, Con., Am. Marine Shells, p. 37, pi. 7. 



Petricola pholadiformis. Desk., Ency. Meth., p. 747. 



Petricola fornicata, Saij, Jour. Acad. Nat. Sci., Vol. 2, p. 319. 



Petricola pholadiformis, Say, Amn. Conch., pi. 60, fig. 1. 



Petricola pholadiformis, Ravenel, Cat. Coll. Shells, p. 3. 



Petricola pholadiformis, Gould, Invert. Mass., p. 63. 



Petricola pholadiformis, De Kay, Zool. New- York, Art. Mollusca, p. 228, pi. 33, fig. 228. 



Petricola pholadiformis, L. R. Gihbes, Tuomey's Geol. So. Ca., appendix, p. xxii. 



Petricola pholadiformis, Tuomey Sf Holmes, Pleiocene Foss. So. Ca., p. 87. 



Petricola pholadiformis, Adams, Gen. Recent Shells, Vol. 2, p. 441. 



Petricola pholadiformis, Say's Conch. U. S., (Binney,) p. 222. 



Description. Shell elongated, cylindrical, inequilateral; buccal side very short, rounded 

 radiately, and striate ; ribs lamellar ; anal side produced; lunule ovate. 

 Common along the whole Atlantic coast of the United States. 



Plate VII. Fig. 6. 



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



