94 University of California Publications in Geology [Vol. 10 



/. salmontanus. The distance from the posterior end of the paraeone 

 to the posterior end of the tooth is slightly greater in no. 22362, as 

 is also the distance from the middle of the metacone to the posterior 

 end of the tooth. The distance from the middle of the metacone to 

 the anterior end of the tooth is greater in I. salmontanus. 



10 11 12 



Figs. 8« to 9. Indarctos( ?) oregonensis, n. sp. M- of right and left sides, 

 no. 22362, natural size. Fig. 8a, of left side, outer view; fig. 8b, M 2 of left 

 side, occlusal view; fig. 9, M- of right side, occlusal view. Rattlesnake forma- 

 tion, John Day Valley, Oregon. 



Fig. 10. Hyaenarctos sivalensis Falc. and Caut. M-, occlusal view, natural 

 size. Siwalik beds, India. (After Lydekker.) 



Fig. 11. Hyaenarctos punjabiensis Lydekker. M-, occlusal view, natural 

 size. Siwalik beds, India. (After Lydekker.) 



Fig. 12. Indarctos salmontanus Pilgrim. M 2 of type specimen, occlusal view, 

 natural size. Siwalik beds, India. (After Pilgrim.) 



