NORTH-CAROLINA GEOLOGICAL SURVEY. 



301 



FAMILY PIIOLADIDAE. 



These species of Pbolas 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.* CARDIUM MAGNUM. CARDIUM VENTRICOSUM. 



Shell large, inflated, obliquely cordate, radiately ribbed, 

 ribs flattened, anterior ones crenulated. 



This magnificent fossil is found occasionally in the mioceue. 

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

 dant upon the coast, near Beaufort. 



CARDIUM MURICATTJM. (Fig. 232- 3.) 



The specimen given in the figure resembles the muricatum, 



FIG. 232- 3. 



* The families cardidae and carditidae should hare preceded vcnoridae. 



