240 



NORTH-CAROLINA GEOLOGICAL SURVEY. 



of denticulatious 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. 



FIG. 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 verv 



FIG. 74. * 



^ .closely an oxyrhma. Mio- 



JrA cene. 



J|4\ Figures 75, 76, 77, 78, 79, 



4H ^ 8 an( * 81 k e l on to the eo- 



FIGS. 75 & 76. 



cene. 



FIGS. 77 & 78. 



FIGS. 79 & 80. 



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 : 



I 



