128 



(iREGORY: AVTHARCTl'S, AN AMERICAN EOCENE PRIMATE 



which may indicate that the root is becoming di\-ided into external and internal moieties; third, p|. 

 which become progressively sul)molariform in the later types but never attain the complete molar pattern; 

 p'* has three complete roots ; the main anterior and posterior roots are more or less grooved or divided into 



Fig. 84. Upper dental iircli of Jr/«p/.y //;f/(/////,v. After Stehlin. X j. 



1 



the left side is well preser\ed. 



