430 Thorpe — Some Tertiary Carnivora in 



Nothocyon vulpinus color ado ensis, mut. nov. 



(Fig. 2.) 



Holotype, Cat. No. 12812, Y. P. M. Lower Miocene, Pawnee Buttes, 

 Colorado. 



The holotype consists -of part of a left ramus with P 8 , 

 P 4 , M 1? and the alveolus of M 2 . It differs from N. vul- 

 pinus, its nearest ally, in having a relatively shorter jaw, 

 larger sectorial, relatively smaller tubercular molar, pre- 

 molars crowded, but with same individual anteropos- 

 terior diameter as in N. vulpinus, while their anterior 

 cingulum is nearly obsolete. The sectorial has a small 

 cusp between the protoconid and hypoconid, which is, I 

 think, an individual variation. 



Fig. 2. 



'¥£ 



Fig. 2. — Nothocyon vulpinus color ado ensis, mut nov. Holotype. Nat. 

 size. A, occlusal view of premolars and first molar; B, external view of 

 left ramus. 



Measurements. 



N. color ado ensis N. vulpinus 

 mm. mm. 



Space occupied by P 3 , P 4 , and M x 26.5 27.5* 



Diameters of M 1? transverse 5.5 4.8 



Diameters of M x , ant.-post 14 11.8 



Maximum depth below M t 13.5 11 



* Taken from drawing. 



Nothocyon latidens multicuspis, subsp. nov. 

 (Fig. 3.) 



Holotype, Cat. No. 12801, Y. P. M. Miocene, near Antelope Creek, 

 Nebraska. Collected in 1873 by Professor Marsh. 



This specimen, consisting of part of a right ramus with 

 Mj, M 2 , alveolus of M 3 and part of that of P 4 , is somewhat 



