HOLOCEPHALI. 117 



ter oval, well within border, cut off at its posterior portion, but in 

 advance of position of inner area. Dentinal areas moderate, 

 inner undivided, extending to inner margin on upper face of 

 mandible, and outer area produced anterior to inner area. Inner 

 and posterior outer dentinal areas lost. Length, to anterior outer 

 area, 50 mm. Terminal column laminar, extending well back on 

 outer edge of beak. Outer face of jaw uniformly convex to an- 

 terior outer area, apex transverse, not compressed. Symphyseal 

 face not well marked. (From Cope.) 



This species is stated by Cope to be quite near B. mirificus, dif- 

 fering in uniform convexity of outer face, which in the latter is 



Fig. 67. — Edaphodon eocanus (Cope). (Type, from Hussakof.) 



partially concave. Cope says the palatal areas are large, elongate, 

 but not on elevated bases as in B. smockii. Outer face of palatal 

 smooth, lower border very oblique to interior, which is longitu- 

 dinally grooved. The specimen he had included five dentinal 

 columns, inner borders more or less exposed, and median or in- 

 terior column longest. This piece was similar in generic char- 

 acters to that of B. mirificus. 



Formation and locality. The type consists of a mandibular in 

 the American Museum at New York. Two paratypes are a pala- 

 tal and a fragment, all from the Eocene greensand of Farming- 

 dale in Monmouth County. I have not examined any examples. 



