Vol. 5] 



Merriam. — John Day Carnivora. 



25 



of these writers are only confirmed by the excellent material of 

 altigenis now available. These specimens show that in this species 

 the deuteroeone of P 4 is extraordinarily large compared with 

 that in most typical canids. The same feature is seen in ferox, 

 and the deuterocone of P 4 in wallovianus is also larger than 

 is indicated in Cope's figure of this form; so that this char- 

 acter may be considered diagnostic of the genus. The reduced 

 and almost rounded form of the protocone of M 1 is evidently 

 characteristic of altigenis, but is not marked in either ferox or 

 wallovianus. M 2 is relatively larger in altigenis than in the other 

 species. 



y 



Fig. 7. Temnocyon altigenis Cope. Inferior aspect of right superior dental 

 series. No. 9999. John Day beds, Logan Butte, Crook County, Ore- 

 gon. X %. 



Fig. 8. Temnocyon altigenis Cope. Superior aspect of dentition shown in 

 fig. 9. X %. 



Fig. 9. Temnocyon altigenis Cope. Outer side of left ramus of the man- 

 dible. No. 9999. John Day beds, Logan Butte, Crook County, Ore- 

 gon. X %. 



