258 



NORTH-CAROLINA GEOLOGICAL SURVEY. 



FIG. 129. 



TEBEBRA UNILINEATA ; TUOMEY AND HOLMES - FOSSILS OF SOUTH- 



CAROLINA. (Fig. 129.) 

 Shell thick, elongate bands alternate, acute. 

 tapering gradually to a point ; whirls many, 

 seventeen or eighteen, and ornamented by 

 revolving impressed lines, and passingjust 

 above the middle of the whirl ; the upper 

 part of the spire is also marked by short 

 longitudinal ribs, which are interrupted by 

 spiral lines. Oblique lines of growth are 

 usually conspicuous. In old specimens, 

 the ribs are obsolete. 



Common in the miocene of Korth-Caro- 

 lina. 



TEREBRA NEGLECTA. N. S. 



Shell terete ; spire composed of many 

 whirls, traversed spirally by a deeply 

 impressed line, dividing it into two un 

 equal parts ; the lower has three or four interrupted spiral 

 lines, the upper, none. The ribs of the upper part are more 

 obtuse than the lower, and die out before they reach the di 

 viding impressed line ; in the lower, they cross it from line to 

 line. 



In this species, the revolving lines are lewer than in the 

 T. dislocatum, and in the latter, they are common to both 

 parts of the whirl. In the unilineata, there is but one dis 

 tinct revolving line. 



DOLIUM OCTOCOSTATUM. N. S. (Fig. 129 a.) 



Shell small, thin ; whirls three, infla 

 ted ; body-whirl ornamented with eight 

 spiral ribs, connected by short bars, 

 peristome interrupted ; aperture ovate ; 

 umbilicus small, open ; outer lip crenu- 

 lated. 



]!&amp;gt;;. 



FIG. 181. 



