ILLUSTRATIONS xvii 



Figure Page 



93. Right half, superior view of skull of Promerycochaerus marshi (HT) 136 



94. Skull and jaw of Promerycochaerus microcephalus (HT) 137 



95. Left half, superior view of skull of Promerycochaerus microcefhalus (HT) 137 



96. Skull and jaw of Promerycochaerus montanus grandis (HT) 140 



97. Maxillary fragment of Promerycochaerus suferbus (GCT) 141 



98. Inferior view of maxillary of Promerycochaerus superbus (GCT) 141 



99. Fragment of ramus of Promerycochaerus superbus (GCT) 142 



100. Fragment of ramus of Promerycochaerus superbus (GCT) 142 



101. Inferior molars of Promerycochaerus superbus (GCT) 142 



102. Fragment of ramus of Promerycochaerus superbus (GCT) 142 



103. Skull of Promerycochaerus temporalis ( HT) 143 



104. Right half, superior view of skull of Promerycochaerus temporalis (HT) 143 



105. Inferior view of skull of Promerycochaerus temporalis (HT) 144 



106. Skull and superior dentition of Promerycochaerus thomsoni (HT) 146 



107. Skull and inferior dentition of Promerycochaerus thomsoni (PT) 146 



108. Skull of Pro?)ierycochaerus vanfasselensis (HT) 148 



109. Superior view of skull of Pronierycochaerus vanfasselensis (HT) 149 



1 10. Inferior view of skull of Promerycochaerus vanfasselensis (HT) 149 



111. Skull, superior dentition, and front foot of Promerycochaerus vanfasselensis pygmwus (HT and PT) 150 



112. Fragmentary skull and superior dentition of Merycochaerus buwaldi (HT) 153 



113. Skull and dentition of Merycochaerus magnus (HT) 155 



114. Skull and jaw of Pronomothe/ium altiramus (HT and PLT) 162 



115. Flesh restoration of head of Pronomotherium altiramus 163 



1 16. Inferior dentition of Pronomotheriu?n altiramus (HT) 163 



117. Fragmentary ramus of Pronomotherium elrodi (HT) 164 



118. Skull and jaw of Pronomotherium laticeps (GHT) 166 



119. Fragmentary ramus of Pronomotherium jnadisontum (HT) 167 



120. Skull of Pronomotherium siouense (PLT) 168 



121. Superior view of skull of Pronomotherium siouense (PLT) 169 



122. Inferior view of skull of Pronomotherium siouense (PLT) 169 



123. Right ramus of Pronomotherium siouense (HT) 170 



124. Skull and jaw of Merycoides cursor (GHT) 172 



125. Skull and jaw oiMerycoides latidens (HT) • 174 



126. Skull and jaw of Merycoides longiceps (HT) 175 



127. Superior view of skull of Merycoides longiceps (HT) 175 



128. Inferior view of skull of Merycoides longiceps (HT) 1 76 



129. Skull of Paroreodon marshi (GHT) 179 



130. Right half, inferior view of skull of Paroreodon marshi (GHT) 179 



131. Right half, superior view of skull of Paroreodon marshi (GHT) 179 



132. Skull of Phenacoccelus tyfus (GHT) 183 



133. Superior view of skull of Phenacoccelus typus (PT) 183 



134. Inferior view of skull of Phenacoccelus typus (PT) 184 



135. Superior dentition of Phenacoccelus typus (PLT) 184 



136. Inferior dentition of Phenacoccelus typus (PLT) 184 



137. Skull and jaw of Ticholeptus bannackensis (HT) 187 



138. Skull and jaw of Ticholeptus brachymelis (HT) 189 



139. Skull and jaw of Ticholeptus breviceps (HT) 190 



140. Ramus and inferior dentition of Ticholeptus hypsodus (HT) 192 



