NORTH-CAROLINA GEOLOGICAL SURVEY. 



301 



FAMILY PHOLADIDAE. 



These species of Pholas have been found in the miocene of 

 this, viz: P. Costata, P. Oblongata, and P. Memmingeri. 

 They are rarely if ever entire, but their fragments are not 

 uncommon. 



FAMILY CARDIDAE.* CAKDIUM MAGNUM. CARDIUM VENTRICOSUM. 



Shell large, inflated, obliquely cordate, radiately ribbed, 

 ribs flattened, anterior ones crenulated. 



This magnificent fossil is found occasionally in the miocene. 

 It is quite common in the pliocene, and is now very abun- 

 dant upon the coast, near Beaufort. 



CARDIUM MURICATUM. (Fig. 232-'3.) 



The specimen given in the figure resembles the muricatuin, 



FIG. 232-'3. 



* The families cardidae and cardiiidae should have preceded veneridae. 



