NORTH-CAROLINA GEOLOGICAL SURVEY. 



GLLEOCERDO EGARTONI. 



Tooth small, rather flat, lanceolate, slightly oblique, convex 

 on both faces of the crown, but concave at the base on the 

 outer face ; root spreading widely, and obscurely wrinkled ; 

 serratures sub-equal, serrate or finely lobed ; the enamel ex- 

 tends lower on the outer than the inner side. The latter 

 character I am disposed to regard as its most distinguishable, 

 for though the size of the teeth of this species may vary con- 

 siderably, the character of the serratures will be preserved. 



GALEOCERDO STTB-CRENATUS, N. S. 



Tooth nearly upright, or with only a slight obliquity poste- 

 riorly ; anterior edge formed by an arch belonging to the 

 lower half, while the apical extremity or half the edge is 

 straight, posterior edge is also straight for two-thirds the dis- 

 tance from the apex to the base, below which, the edge is 

 drawn inwards ; there is a constriction also on the opposite 

 edge at the base of the crown ; edges rather obsoletely cre- 

 nate than serrate, smooth near the apex, and the smoother 

 wing of the posterior edge stands at right angles to the axis 

 of the crown ; upper face rather flat, and marked by a faint 

 rounded ridge extending from the base to the apex, and the 

 surface slopes only from this ridge to the margins. The char- 

 acteristics of this species will be gathered from the preceding 

 description. The absence of distinct serratures, the form of 

 the crown, its constriction at base, are the most important 

 points, in which respects it differs from any which I have 

 seen. 



GALEOCERDO PRISTODONTUS. AGASS. (Fig. 68.) 



Crown large, oblique ; anterior edge irregularly arched, 

 and extending much farther upon the base 

 than the opposite edge ; upon the flat, or 

 nearly flat face, or outer one, the enamel 

 extends below that on the convex side : 

 seratures unuequal. Hare in Xorth-Caro- 

 lina, but I have several specimens, and 

 from Dr. Gibbs's account of it, it seems 

 to be still more rare in South-Carolina. 



