240 



NORTH-CAROLINA GEOLOGICAL SURVEY. 



of denticulations at base. In other characters there is only a 

 slight difference between this and the L. elegans. They are 

 found in the same beds. 



FIG. 72. 



Fio. 73. 



L. COMPRESSA. 



Compressed or flat, both faces convex and 

 sub-equal, base irregularly denticulated; root 

 wide and spreading. It differs widely from 

 L. elegans and contortedens, but resemble* 

 the otodus; but Prof. Gibbs remarks that they 

 are more lanciform, and the core more slen 

 der than the otodus. 



Figures 73 and 74 appear to belong to the 

 lamna. They are rather thick 

 and stout, and resembles very 

 .closely an oxyrhina. Mio 

 cene. 



Figures 75, 76, 77, 78, 79, 

 80, and 81, belong to the eo 

 cene. 



FIG. 74. 



FIGS. 75 & 76. 



FIGS. 79 & 80. 



FIGS. 77 & 78. 



FIG. 81. 



L. CRASIDENS. 



Tooth thick and comparatively short ; not very thick and 

 projecting inwardly; inner face striate as in the preceding 

 species. 



GENUS OTODUS. 



Tooth rather broad and flat, and armed with equal sharp 

 denticles at base ; root rather thick, projecting inward. 



OTODUS APPENDICULATUS. AGASS. 



Tooth oblique, sharp or pointed, faces unequally convex : 





