2IO Biclletin America7i Museum of Natural History. [Vol. XIX, 



sent this species. Of these I take No. 9616 as type. Com- 

 pared with a quite large series of specimens, including the 

 types of C. gregarins and C. lippincottianus, these specimens 

 show certain constant differences, chiefly in the construction 

 of ma- This tooth is proportionately larger and longer, the 

 heel larger and wider, and the proto- and metaconids are 

 raised above the paraconid, instead of being nearly on a level 

 with it, as they usually are in C. gregarius. The shear of nii 

 is somewhat more transverse, and m^ is a little less reduced. 

 The size is that of C. gregarius.- 



The above characters are slight distinctions indeed, but 

 their constancy in the very considerable series of specimens 

 compared makes them valid specifically. In Procynodictis 

 vulpiceps of the Uinta, the shear is more transverse, but va^ is 

 smaller and its heel more reduced than in C. gregarius. 



Measurements . 



Type, No. 

 9616 



Cotype, No. 

 9618 



Pi-m3 



Mi-m3 



Mi longit 



" transverse. . . 



" height of pra 

 M2 longit 



' ' transv 



M3 longit 



" transv 



35 mm. 

 17 



9- 



4-2 



5-2 

 3-3 



Bunaelurus infelix, spec, no v. 



No. 9620, part of a lower jaw with p4_mi and the stump of 

 m.2, represent this species, which is with difficulty distin- 

 guishable from B. lagophagMS. The protocone of mi is more 

 rounded, the shear a little more transverse than in Cope's 

 species. The fourth premolar appears to be stockier and 

 longer than in the type of B. lagophagus, but it is not fully 

 formed in the jaw in that specimen, so the comparison is 

 questionable; the protocone is stout and round, with a small 



