430 G. I. Adams — Extinct Felidce of North Ainerica. 



The Dinictis iSeries. 

 Dinictis felina Leidy. 



This is the type species of the genus and is well known from 

 the original description by Leidy, and the osteology by Scott. 

 A summary of its essential differences from Hoplophoneus is 

 given in this paper, consequently no further discussion will be 

 given here. The skull figured is a well preserved specimen in 

 the Princeton Museum (number 10972). Dental formulas I-JC4- 

 PmfMi 



Length of skull, condyles to premaxillary border, 163 mm 



" humerus __ 172 



" femur. _ _ 190 



" tibia. 168 



Dinictis squalidens Cope. 



This species was first described from a portion of a deciduous 

 superior canine and a fragment of a mandible supporting the 

 deciduous dentition. Later a mandible containing the permanent 

 dentition was referred to it. The skull figured in the series 

 (number 11379 in the Princeton Museum) contains the permanent 

 dentition except the superior canines, which are just on the point 

 of being replaced. Its reference to D. squalidens from the char- 

 acter of the mandible is not to be doubted. The specimen 

 although immature is considerably smaller than D. felina and 

 differs from it sufficiently to warrant its reference to a distinct 

 species. 



Length of skull, condyles to premaxillary border, 140 mm 



Dinictis for tis Adam?. 



This species was described principally from a skeleton. D. 

 bombifrons, which, was described from a skull, has since been deter- 

 mined to be a synonym of the former (Amer. Nat., January, '96, 

 p. 50, foot-note). Further material has shown D. fortis to be 

 quite distinct from D. felina^ and now that the skull is known the 

 species may be considered as established. The skull here figured 

 is the one originally described as D. bombifrons. 



Length of skull, condyles to premaxillary border, 185 mm 



" humerus 192 



" ulna 191 



" femur _ 205 



" tibia 186 



D. cyclops Cope. 



With this species we take up the John Day forms. The out- 

 line drawing here given is from the type skull figured by Cope. 

 The striking features of it are its convex profile, the round orbit 

 and the short temporal space. In a general way it is comparable 

 with Hoplophoneus cerebralis, also from the John Day. 



Length of the skull condyles to premaxillary border, 150 1 



imm 



