426 University of California Publicai 



The Dental Armature as a Cutting a 



The work of the beaver, as exemplified i 

 for lodges and dams, serves to illustrate th 

 as cutting agents. The beaver's incisor i 



obtaining between the genera Castor and Ere 

 by former workers. Another character, of 

 tion, is the condition of the palato-maxillary 

 instead of plane in both genera. Authority 

 in referring the beavers to the sciuromorph 



