C.O NT EH NTS 
PREFACE 
INTRODUCTION 
7 MAMMALIA. 
CHAPTER I. 
DESCRIPTIONS OF UNGULATA PARIDIGITATA 
Fam. 1.—RUMINANTIA . : 
Poebrotherium . 
Wilsonii 
Agriochoerus 
antiquus 
Oreodon 
Culbertsonii 
gracilis . - : 
Comparison between Oreodon Culbertsonii and Oreodon gracilis . 
Oreodon major . 
Eucrotaphus 
Jacksoni 
auritus 
Fam. 2.—PARIDIGITATA ORDINARIA 
Archaeotherium 
Mortoni 
robustum 
CHAPTER II. 
DESCRIPTIONS OF UNGULATA IMPARIDIGITATA 
Fam. 1.—Sonrprpta 
Anchitherium 
Bairdii 
Fam. 2.—IMPARIDIGITATA ORDINARIA 
Titanotherium 
Proutii 
Palaeotherium 
giganteum 
Rhinoceros 
occidentalis 
Nebrascensis 
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