170 PROCEEDINGS OF THE ACADEMY OF [1879. 



** No inferior tubercular molar. 



Premolars ; incisors . Hoplophoneus. 



Premolars T ; incisors ^. Eusmilus. 



oa. Inferior sectorial without heel ; an anterior lobe of the 

 superior sectorial, and posterior lobes of the premolars. 

 Premolars f, first inferior two rooted. Machserodus. 



Premolars ^n', first inferior one rooted. Smilodon. 



II. The anterior and lateral faces of the mandible continuous, 

 convex. (No inferior tubercular molar.) 

 a. Inferior sectorial tooth with a heel. 



Premolars f , no posterior lobes ; second superior with in- 

 ternal heel (plantigrade). Cryptoprocta. 

 Premolars with posterior lobes; no heel of second supe- 

 rior. Pseudselurus. 

 oa. Inferior sectorial without heel ; premolars with posterior 

 lobes; superior sectorial with anterior lobe. 

 ]3. Superior sectorial with internal heel. 

 y. Pupil round. 



Premolars f. Uncia. 



Premolars . Neofelis. 



yy. Pupil vertical. 



Orbit closed behind ; premolars f . Catolynx. 



Orbit open ; premolars . Felis. 



Orbit open ; premolars \. Lyncus. 



/3j3. Superior sectorial without internal heel. 



Pupil round, premolars ; orbit open posterioi'ly. 



Cynselurus. 



The following catalogue includes the species of the Felidse, the 

 names of the recent ones being derived from Gray's Catalogue, 

 and printed in Roman letters. These are probably too numerous 

 in the genera Felis and Lyncus, but I do not possess the means 

 of properly disposing of them. 



Dinictis, Leidy. Aelurogale, Filhol. ?Daptophilus, Cope. 



D. intermedia, Filhol. Phosphorites, France. 

 D. squalidens, Cope. White River, Colorado. 

 D.felina, Leidy. White River, Nebraska. 

 D. cyclops, Cope. White River, Oregon. 



Nimravus, Cope. 



N. brachyops, Cope. White River, Oregon. 



