EXPLANATION OF PLATE I. 



Tephyrocyon rurestris Condon. 



From the Mascall beds at Cottonwood, John Day Valley, Oregon. 



All figures three-fourths natural size. 



Fig. 1. Left side of cranium with atlas. Page 6. 

 Fig. 2. Superior aspect of left inferior dental series. 

 Fig. 3. Inferior aspect of right superior dental series. 



