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Figs. 3 and 4. Tephrocyon rurestris (Condon). Dentition of type speci- 

 men, natural size. Mascall Beds, John Day Valley, Oregon. Fig. 3, 

 superior dentition, occlusal view; fig. 4, inferior dentition, occlusal view. 



Fig. 5. Tephrocyon rurestris (Condon). Type specimen. Posterior 

 new of skull with atlas, X M>. Mascall Beds, John Day Valley, Oregon. 



Tephrocyon hippophagus Matthew and Cook 



Tephrocyon hippophagus Matthew and Cook. Bull. Am. Mus. Nat. Hist., 

 vol. 26, p. 374, 1909. 



To this species Matthew and Cook referred eight lower jaws, 

 and a portion of an upper jaw from Snake Creek. The Snake 

 Creek Beds are considered by Matthew and Cook as representing 

 an early phase of the Pliocene. 



After an examination of the type specimen of T. hippophagus, 

 and a comparison with the type of T. rurestris of an excellent 

 east, kindly furnished by Dr. Matthew, there seems no doubt 



