the Marsh Collection, etc. 435 



Measurements. 



C. cuspidatus C. thomsoni* C. thooides\ 

 Holotype 



mm. mm. mm. 



Upper molar series, length 19 16 18.2 



Upper premolar series, length. . . 38 31 40.5 



P 1 , ant. -post, diameter 3.5 4 4 



P 1 , transverse diameter 3 3 3 



P 2 , ant.-post. diameter 8 7.5 9 



P 2 , transverse diameter 4 4 4 



P 3 , ant.-post. diameter 9 8 9.5 



P 3 , transverse diameter 4.5 4.5 5.1 



P 4 , ant.-post, diameter 16.5 16 15 



P 4 , transverse diameter 9 10 11 



M 1 , ant.-post, diameter 11.8 10.5 11 



M 1 , transverse diameter 15 13.7 16 



M 2 , ant.-post. diameter 8 5 7 



M 2 , transverse diameter 11 6.4 10 



* From Matthew 1907. 

 t From Scott 1894. 



Teplirocyon hip popha ejus Matthew and Cook. 



Typical specimens of this species were collected in 

 Nebraska and Colorado. The skull is, however, not 

 known, although it must possess characters very similar 

 to that of T. rurestris. On this basis an individual M 1 , 

 Cat. No. 12789, Y. P. M., has been referred to this genus 

 and species, as it is nearly the same size and shows the 

 same characters as the John Day type of the genus. This 

 superior molar was collected on the Niobrara River, 

 between Antelope Creek and the mouth of Minnechaduza 

 Creek, Nebraska, by Capt. (later Brig.-Gen.) Mills, in 

 1873. Specimen No. 12833, Y. P. M., collected by Pro- 

 fessor Lull, in "Quarry D," Ft. Niobrara Bird Reserva- 

 tion, on the Niobrara River, Nebraska, in 1914, has parts 

 of both maxillae. The axial length of P 4 , M 1 , and M 2 is 

 33 mm. There is also, among other bones, a scapholunar 

 which most probably belongs with the other parts. It is 

 verv similar in size and characters to Canis lat reins. 



