skull of Cliff Dweller. Canon De Chelly, Arizona Territo 



The molar teeth of the inferior maxillary presenl exten- 

 sive Lesions resulting from caries. 



The major portion of the grinding, and distal surfaces oi 

 the left third molar, are affected. 



Destruction of tooth substance is mure pronounced in the 

 left second molar. The entire grinding, and greater pari of 

 the mesial, distal and buccal surfaces are involved. A large 

 opening into the pulp chamber establishes exposure and de- 

 vitalizal ion of the pulp. 



17 



