130 CRETACEOUS AND TERTIARY -FISH. 



I have but the single example, fragmentary, described above. 

 It somewhat resembles the palatal of B. miriilcus, except that the 

 anterior dental areas are much longer and arise on a much higher 

 crest. 



Formation and locality. Recorded only as "from the Green- 

 sand of New Jersey." 



Edaphodon sp. 



Mandibular bone, right ramus, a trifle more than twice as long 

 as deep, and width a little more than a third its length, so that 

 rami would converge nearly in a triangle, ending in a short, deep 

 symphyseal beak. Outer surface of mandibular generally de- 



Fig. 80. — Edaphodon sp. New Jersey "greensand" (Gabb). 



pressed, slightly concave medianly and equally slightly convex 

 above and below. Outer profile undulated slightly anteriorly, 

 arising somewhat convexly behind above. Lower anterior pro- 

 file convex, then sloping up posteriorly and hind profile verti- 

 cally convex. No beveled symphyseal edge, though anteriorly 

 well depressed or flattened, then surface rather convex, and 

 flaring slightly, more so inward, behind. Oral surface well 

 marked by lateral edges, though these scarcely prominent ridges, 

 except slightly at anterior symphyseal region and posterior ex- 



