HOLOCEPHALL 131 



ternal. Front region of oral surface, near symphysis, and about 

 midway in its length or opposite front of inner dental area, dis- 

 tinct concavities. Inner dental area extends forward slightly be- 

 fore middle in length along inner edge and externally well 

 towards outer edge. Below anterior symphyseal region traces of 

 parallel striae transversely. Lower surface of mandibular largely 

 convex. Length 63 mm. 



Besides the above fragment another with same data seems to 

 resemble the posterior or outer flange of the palatal of B. miri- 

 iicus. 



Formation and locality. I have two fragments "from the 

 Greensand of New Jersey" (W. M. Gabb). 



Edaphodon sp. 



Mandibular bone, right ramus (hind end largely broken away) 

 about half long as deep, and rami probably well diverging 

 behind. Symphyseal plain, moderate, distinct. Outer mandi- 

 bular surface generally depressed, somewhat concavely. Inner 

 dentinal area large, and apparently begins a little behind outer, 

 though latter but imperfectly preserved. Length about 68 mm. 



The above fragment is in the collection of the Geological Sur- 

 vey and is without data, though, like the next, was most likely 

 from the Cretaceous of New Jersey. Similarly it suggests B. 

 incrassatus, but is too imperfect for satisfactory comparison. 



Formation and locality. Not given. 



