PLATE. 6. 



Fig. 1. — Lateral view of skull of type of Ursus americanus pugnax. 

 Reduced to % natural size. Note the depressed frontals, prominent post- 

 orbital processes, largely developed sagittal crest and general appearance 

 of massiveness. 



Pig. 2. — Dorsal view of skull of type of U^sus americanus pugnax. 

 Reduced to % natural size. Note the conspicuous sagittal crest and 

 temporal ridges, and' the heavily built and wide-spreading zygomata. 



[172] 



