NORTH-CAROLINA GEOLOGICAL SURVEY. 



MARGINELLA OLIVAEFORMIS. PORCELLANA OLIVAEFORMIS I TUOMEY 



& HOLMES, FOSSILS OF SOUTH- CAROLINA, p. 131. (Fig. 133.) 



" Shell elongated, oval ; spire profoundly obtuse ; aperture 

 linear ; labrum, (or outer lip) tumid, reflexed, profusely cre- 

 nulated within ; columella with three raised plaits." 



With this description, several specimens agree, which I 

 have found in the marl beds. It is, however, rare. 



FIG. 138. FIG. 136. FIG. 133. 



FIG. 139. 



FIG. 135. FIG. 134. 



MARGINELLA LIMATULA. (Fig. 134.) 



Shell ovate ; spire short ; outer lip unequally crenulated ; 

 columella lip four plaited ; aperture contracted above by de- 

 position of callus. 



MARGINELLA CONSTRICTA. N. S. (Fig. 135.) 



Shell polished, cylindrical ; spire short ; aperture constricted 

 in the middle by the imbending of the outer lip ; plaits four 

 crowded at the base ; margin of the outer lip smooth. 



MARGINELLA OVATA. N. S. (Fig. 136.) 



Shell ovate ; spire much depressed ; aperture uniform ; 

 outer lip marked with numerous crenulations within ; colu- 

 mella with six or seven plaits, the upper becoming obsolete. 



MARGINELLA INFLEXA. N. S. (Fig. 13T.) 



Shell oval ; spire somewhat elevated ; obtuse at base ; mar- 

 gin of the outer lip inflexed above the middle ; smooth inside ; 

 plaits four, and very prominent upon the inner lip. Diners 

 from the constricta in the height of the spire. 



