1 64 CRETACEOUS AND TERTIARY FISH. 



Formation and locality. Known from various teeth, the type 

 a palatine tooth, in the collection of the American Museum at 

 New York. It is from the "Cretaceous No. 4" at St. Georges, 

 Delaware, though Cope also had other material from the same 

 horizon in New Jersey. Not seen by me. 



Enchodus oxytomus Cope. 



Enchodus oxytomus Cope, Rep. U. S. Geol. Surv. Terr., II, 1875, P- 2 78- 

 Clays below Cretaceous, No. 4, N. J. 



Long tooth from front extremity of premaxillary or dentary. 

 Differs from other species of the genus in extent to which hind 

 cutting-edge prolongs downward toward base of tooth, nearly 

 equaling in this respect anterior edge. As in all other species of 

 the genus cutting-edges not opposite, and a section of base un- 

 symmetrical. Cementum mostly smooth. Crown rather broad 

 for its length, which is below average of Cretaceous species. 

 (From Cope.) 



Only known from the above incompletely described example, 

 originally in the Cope collection. 



Formation and locality. Known only from "clays below Cre- 

 taceous No. 4." Not seen by me. 



Enchodus sp. 



Tooth solid, curved, compressed, rounded convexly behind and 

 constricted to sharp cutting-edge in front, and (though imper- 

 fect) apparently entire. Crown as viewed from cutting-edge 



Fig. 100. — Enchodus sp. Monmouth Co. (Slack). 



deflected convexly to one side, and basally slightly expanded. 

 Each side of base with fine parallel striae of rather uneven depth, 

 and not extending up more than basal two-fifths. Length 14 mm. 



