CONTENTS xi 



Systematic description of genera and species — Cont. 



Genus Promerycochoerus — Cont. Page 



Promerycochoerus macrostcgus 132 



Promerycochoerus macrostegus inflatus 134 



Promerycochoerus marshi 135 



Promerycochoerus microcephalus 137 



Promerycochrerus montan us 138 



Promerycochoerus montanus grandis 139 



Promerycochoerus superbus 141 



Promerycochoerus thomsoni 145 



Prome rycochoerus vantasselensis 147 



Promerycochoerus vantasselensis pygm.Tus 150 



Genus Merycochoerus 151 



Merycochcerus buwaldi 152 



Merycochoerus coenopus 153 



Merycochoerus magnus 154 



Merycochcerus matthewi 156 



Merycochcerus proprius 157 



Genus Pronomotherium 160 



Pronomotherium altiramus 161 



Pronomotherium elrodi 164 



Pronomotherium laticeps 165 



Pronomotherium madisonium 167 



Pronomothe rium siouense 168 



Pronomotherium species 170 



Genus Merycoides 171 



Merycoides cursor 171 



Merycoides latidens 173 



Merycoides longiceps 174 



Genus Paroreodon 177 



Paroreodon marshi 178 



Genus Phenacoccelus 180 



Phenacoccelus munroensis 181 



Phenacoccelus typus 182 



Genus Ticholeptus 186 



Ticholeptus bannackensis 187 



Ticholeptus brachymelis 188 



Ticholeptus breviceps 190 



Ticholeptus hypsodus 191 



Ticholeptus obliquidens 192 



Ticholeptus petersoni 193 



Ticholeptus rusticus 194 



Ticholeptus smithi 197 



Ticholeptus zygomaticus 198 



Ticholeptus species 199 



