TABLE OF CONTENTS. 



Page. 



PEEFACE .' 14 



EXTINCT VERTEBRATE FAUNA OF THE BRIDGER TERTIARY FORMATION OF WYOM- 

 ING TERRITORY. 15 



INTRODUCTION 15 



MAMMALIA « 27 



Order Perissodactyla . 27 



Palseosyops 27 



paludosus 28 



major 45 



Junius 57 



Limnohyus - *. b% 



Hyrachyus '. 59 



agrarius 60 



eximius G6 



modestus G7 



nanus 67 



Lophiotherium 69 



sylvaticum 69 



Trogosus 71 



castoridens 71 



vetulus 75 



Hyopsodus # 75 



paulus 75 



minusculus 81 



Microsus 81 



cuspidatus 81 



Mycrosyops 82 



gracilis 83 



Notbarctus 86 



tenebrosus 86 



Hipposyus 90 



formosus •' 90 



robustior 93 



Order Proboscidea 93 



Uiutatherium 93 



robustum •- 96 



Order Rodentia 109 



Paramys - 109 



delicatus 110 



delicatior 110 



delicatissimus Ill 



Mysops Ill 



minimus 111 



fraternus 112 



Sciuravus '- 113 



Order Caniivora 114 



Patriofelis 114 



ulta 114 



Sinopa 116 



rapax 116 



eximia i 118 



