FIG. 88. Inferior surface of the skull of Mcsonyx uintensis, family Mesouychidaj, of the 

 Creodonta, from the Uinta Formation, Upper Eocene, xl. Note the bluntly tritubercular 

 molars. 



A 



/r~ ^i. ?~>w- - 



& te 





tn.2 m I p. 4 p.3 p.2 P ' 



FIG. 89. Upper and lower teeth of Sinopa o^ixtkutmna, family Hyaenodontidse, sub-order 

 Creodonta, from the Wasatch Formation, Lower Eocene, Wyoming, showing the sectorial modi- 

 fication of ml, in- and 7H 2 , ) 3 . A, Superior view, upper teeth ; B, Outer side view, lower teeth ; 

 ( ', Superior view, lower teeth, x ^. After Matthew. 



