THALAECTOS 



301 



with lobes more sharply defined. Canines both above and below 

 essentially similar to those of Ursus arctos, except for their greater 

 size. Owing to the greater width of palate the proportion of 



Fig. 56. 

 Thalarctos maritimus. X \. 



diameter of upper canine to palatal width is about as in the 

 smaller-toothed animal. Small premolars showing no special 

 peculiarities. Large upper premolar with relatively higher 



