A NEW SPECIES OF DINICTIS. 



239 



recurved and slightly drawn to an angle on the posterior side 

 throughout its entire length. The second premolar is separated 

 from the canine by a descending diastema somewhat longer than in 

 D. felina, and almost double that of D. s'qualidens. The tooth is 

 a trifle smaller than the corresponding upper one and like it is 

 separated from the third premolar by a short diastema. It is two- 

 rooted and similarly compressed, but retains a slight posterior lobe. 

 The third and fourth premolars are similar in size to those of D. 

 fi'lina, but the basilar lobes are larger and more angular. The 

 lower sectorial has a more prominent heel, but bears only the 

 slightest trace of a postero-internal cusp. No trace of a second 

 molar can be found, although fractures in both of the mandibles 

 just back of the carnassials would have brought it to light had 

 even a rudiment existed. 



The length and proportions of the bones of the front leg indicate 



Skull of Dinictis parlcidens Riggs. 



a very slender animal. The humerus though slenderer is almost as 

 long as that of the robust D. hoinbifrons described by Mr. Adams 

 in the American Naturalist for June, 1895, while the radius is con- 

 siderably longer and more slender. A series of measurements 

 compared with those of D. fclina will give an idea of the relative 

 size. In Leidy's description of the generic type measurements of 

 two different specimens are given. Those of the second and larger 

 are used on account of their corresponding most nearly with the 

 measurements of this specimen. 



