Peterson: Material Discovered in Uinta Basin. 141 



Rodentia (Glires) Ischyioinyida' 60 



Muridae 66 



Artiodactyla, Homacodontinae 66 



Anoplotheriidae 76 



Achsenodontidse 79 



Agriochceridae 82 



Camelidae 88 



Hj'pertragulidae 93 



Perissodactyla, Hyracotheriinae loi 



Pseudotapirs of the North American Eocene 103 



Helaletidse 103 



Isectolophidas fam. nov 115 



Isectolophina? subfam. nov 116 



Rhinocerotoidea, Hyracodontidae 127 



Hyrachyinae 127 



Amynodontina; 130 



Hyracodontinae 131 



Chahcotheroidea, Schizotherinae 139 



