4 8 



Length of diastema between canine and incisors -018 



Fore-and-aft diameter of canine -019 



Transverse diameter of canine -015 



Length of diastema between canine and premolars *oi45 



Length of premolar series 083 



Length of first premolar -016 



Width of first premolar -009 



Length of second premolar -021 



Width of second premolar -017 



Length of third premolar -022 



Width of third premolar -022 



Length of fourth premolar -024 



Width of fourth premolar -027 



Length of true molar series 106 



Length of first molar -031 



Width of first molar -031 



Length of second molar -037 



Width of second molar -040 



Length of third molar -038 



Width of third molar -041 



LOWER JAW. M. 



Length of entire molar series -202 



Length of premolar series 08 1 



Length of true molar series 121 



Length of second premolar 024 



Width of second premolar -0125 



Length of third premolar -022 



Width of third premolar -014 



Length of fourth premolar. . . -0235 



Width of fourth premolar -0155 



Length of first molar -030 



Width of first molar -017 



Length of second molar -038 



Width of second molar -021 



Length of third molar -053 



Width of third molar 024 



Found at Henry's Fork Divide. 



This may eventually prove to be a species of Telmatkerium, 

 (Marsh) ; but the description given by him of that genus is 

 so brief and uncharacteristic that it might apply to any of 



the allied genera. Indeed, Dr. Leidy has regarded it as a 

 synonym of Palceosyops. 



