ILLUSTRATIONS xv 



FIG. PAGE 



66. Skull of Pteranodon longiceps . . . . .211 



67. Jaw of Phascolotherium bucklandi . . . . .213 



68. Jaw and Teeth of Spalacotherium tricuspidens . . .213 



69. Jaw of Triconodon mordax . . . . . .213 



70. Drawing of A rch&opteryx macrura . . . . .214 



71. Skull of Archtzopteryx siemensi . . . . .215 



72. Skeleton of Phenacodus primavus . . . . .219 



73. Skeleton of Uintatherium ingens :*... . . .220 



74. Skull of Uintatherium cornutum . . . . .221 



75. Skeleton of Titanotherium robustum . : . .222 



76. Skull of Arsinoitherium zitteli . , , . . .223 



77. Skeleton of Hyanodon cruentus . .; . . .225 



78. Skeleton of Hyopotamus brachyrhynchus . . . .226 



79. Outline and Skeleton of Anoplotherium commune . . 227 



80. Outline Restoration of Palaotherium magnum . . . 227 



81. Skull of Moeritherium lyonsi . . . . .228 



82. Skulls of Ancestral Elephants . . . . . .229 



83. Skeleton of Tetrabelodon angustidens . . . .230 



84. Restoration of Tetrabelodon angustidens . . . .230 



85. Skeleton of Mastodon americanus . . . . .231 



86. Skeleton of Elephas primigenius . . . . . 232 



87. Skeleton of Toxodon platensis . . . . . .234 



88. Skeleton of Glyptodon davipes . . . . .236 



89. Restoration of Megatherium giganteum . . . .237 



90. Skeleton and Outline of Mylodon robustus , . . 237 



91. Skeleton of Scelidotherium leptocephalum . , . .238 



92. Skull of Diprotodon australis ...... 240 



93. Skull of Thylacoleo carnifex . . . ... .240 



94. Skull of Macharodus neogceus . . . ... . 266 



95. Skeleton of Cervus giganteus . . . . .266 



96. Conocoryphe sultzeri (an early Trilobite) .... 267 



97. Paradoxides bohemicus (an early Trilobite) . . . 267 



98. Acidaspis dufresnoyi (a late Trilobite) . . . . 267 



99. Ceratites nodosus (early Ammonite) . . . . .268 



100. Trachyceras aon (early Ammonite) ..... 268 



101. Crioceras emeriti (Cretaceous Ammonite) .... 268 



1 02. Heteroceras emeriti (Cretaceous Ammonite) . . . 268 



