n8 



CRETACEOUS AND TERTIARY FISH. 



Edaphodon incrassatus (Cope). 



Ischyodus incrassatus Cope, Rep. U. S. Geol. Surv. Terr., II, 1875, pp. 285, 

 289. Homerstown, New Jersey. Greensand of Cretaceous No. 5. 



Edaphodon incrassatus Hussakof, Bull. Amer. Mus. Nat. Hist., XXV, 1908, 

 p. 38, PI. 1, figs. 5-6 (type). 



Mandibular with beak little curved outward, long, thick, sym- 

 physeal face a narrow border along inner edge. Convexity of 

 lower half of outer face of jaw very strong, so that lower border 

 thicker than in any other of our species. Inner dentinal area un- 



Fig. 68. — Edaphodon incrassatus (Cope). (Type, from Hussakof.) 



divided, of median extent, extending to inner margin of superior 

 face of mandible, apex marking only middle of anterior oval 

 outer area instead of anterior extremity, latter horizontal on a 

 considerable tuberosity removed well within outer border of jaw 

 so that latter not angulated there as in some similar species. 

 Length 125 mm. (From Cope.) 



