294 



NORTH-CAROLINA GEOLOGICAL SURVEY. 



CYTHERCA SAYANA. (Fig. 221.) 



Shell inflated, concentrically striate, anterior side angulat- 

 ed ; umbones prominent, incurved ; margin smooth ; himule 

 cordate. 



FIG. 221. 



c. REPOSTA. (Fig. 222.) 



Shell smooth, moderately inflated, thick, beaks prominent, 

 dorsal margin depressed; anterior margin rounded, lunule 

 lanceolate. 



FIG. 222. 



C. REPORTA. (Fig. 223.) 



This fossil, which the annexed figures represent, is very 

 common in a sandy marl bed in Brunswick county. It pre 

 serves its original polish, and closely resembles the foregoing. 

 It is, however, proportionally wider than the repostia. It is 

 highly polished and smooth, but has concentric striae. Um- 



