CONTENTS 



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PAGE 



Introduction. — American Selenodonts in General ...... ix 



Geology of the Uinta Basin ....... xii 



White River Selexodonts : 



Leptomerycid.e. — Lcptomcryx . . . . . ' . . . 15 



Hypertraguliis . . . . . . . .17 



Hypisodus . . . . . . . . .19 



Protoceras . . . . . . . . .19 



Uinta Selenodonts : 



I. Camelid.e. — Protylopits . . . . . . . ' . .22 



Systematic position of Protylopits ..... 43 



Lcptotragulus ......... 47 



Systematic position of Leptotragulus . . . . 51 



II. Leptomerycid.-e. — Lcptoreodon . . . . . . . 51 



Systematic position of Leptoreodon .... 64 



Camelomeryx . . . . . . . .67 



Phylogenetic position of Camelomeryx . . . 82 



Oromeryx . . . . . . . .83 



III. Homacodontid^e. — Biuiomeiyx ........ 84 



[V. OreodontidvE. — Protoreodon ........ 85 



Taxonomic position of Protoreodon and relationships of 



the Oreodontidce . . . . . .95 



Hyomeryx ........ 99 



X . Agriochcerid.e. — Protagriocharus . . . . . . .100 



Taxonomic position of Protagrioclicerus . . .107 



Summary . . . . ... . . . . . . . .111 



Conclusions. . . . . . . . . . . . . .116 



Phylogenetic Table . . , . . . . . . . . . 1 20 



Literature . ... . . . . . . . . . . .121 



Explanation of Plates ... . . . . . . . . . .122 



