294 



NOKTH-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. Urn- 



