U. S. GEOLOGICAL SURVEY 



MONOGRAPH 55 PLATE LXVIII 



Drawings by E. S. Chriitman 



k^_^ upper J3iW with crown vi 



inner view of low^er i 



INCISORS AND CANINES OF PROTITANOTHERIUM EMARGINATUM 

 atural sise. (See p. 378.) A, Tj^e (Princeton Mus. 11242), level Uinta C 1 (of true Uinta formation), front part of 



e, front part of lower ja-w ^vith 

 '■ of mi, ma, dra-wing reversed 



■■ of incisors and 



