Eat oil — John Dag Felidce in Marsh Collection. 437 



inence of the inner root of the P 4 . Yet so close to 

 Pogonodon davisi is the present species, that the two 

 mnst share the same fate, should Pogonodon in the final 

 analysis fail of recognition as a distinct genus or 

 sub-genus. 



Dincelurus crassus, gen. et sp. no v. 



(Figs. 4-6.) 

 Holotype, Cat. No. 10518, Y. P. M. Upper Oligocene (upper John Day), 

 Turtle Cove, John Day Valley, Oregon. Collected by Wm. Davis in 1875. 



The type is a cranium without the mandible. It is 

 well preserved, except that the posterior part of the 

 sagittal crest and the contiguous parts of the lambdoid 

 ridges have been destroyed and the postorbital process 

 of the right frontal has suffered some abrasion. 



Fig. 4. 



Fig. 4. — Dincelurus crassus, gen. et sp. nov. Holotype. X %• 



Dentition. — I 3 , C 1 , P 2 , M 1 . The teeth are worn to a 

 degree that indicates middle age, but not to such extent 

 as to involve any modification of the alveolar parapet. 

 The incisors, in their present condition, closely resemble 

 those of Nimravns. Of the right canine only the base 

 of the crown remains protruding from the alveolus. The 

 left canine too has been broken, and a little of the base 

 of the crown is lacking, but its characteristic form is 

 shown sufficiently well to differentiate it from Nimravus, 

 Dinictis, Pogonodon, and Hoploplioneus. Briefly charac- 



