CONTENTS 



^ 



Introduction. — American Selenodonts in General 



Geology of the Uinta Basin .... 



White River Selenodonts : 



LeptomeryciD/E. — Lcptoincryx ...... 



Hypertragiilus ..... 



Hypisodus ...... 



Protoceras ...... 



Uinta Selenodonts ; 



I. Camelid/E. — Protylopiis ...... 



Systematic position of Protylopiis 

 Leptotragulus ...... 



Systematic position of Leptotragulus 

 II. LEPTOMERYClDyE. — LeptoreodoH . 



Systematic position of Lcptoreodo7i . 

 Caiiielonieryx ..... 



Phylogenetic position of Cainelomery .x 

 Oromcryx ..... 



III. Homacodontid/E. — Bunomeryx ..... 



IV. Oreodontid/e. — Protorcodon ..... 



Ta.xonomic position of Protoreodon and relationships of 



the OrcodotitidcE 

 Hyomeryx ..... 



V. AgriochceriD;E. — Protagriochccrus .... 



Taxonomic position of Protagriockcerus 

 Summary 

 Conclusions . 

 Phylogenetic Table 

 Literature 

 Explanation of Plates 



43 

 47 

 51 

 51 

 64 

 67 



85 



95 

 99 

 100 

 107 

 1 1 1 

 116 

 120 

 121 



