63. Plesiosaurus dolichodeirus, 108 64. Pterodactylus crassirostris, 108 65. Chelonia Benstedi, 109 66. Palæophis Toliapicus (_Ophidian of the Eocene_), 110 67. Bird-tracks of the Connecticut, 113 68. Fossil Footprint, 114 69. Thylacotherium Prevosti, 117 70. Anoplotherium commune, 120 71. Animals of the Paris Basin, 121 72. Dinotherium giganteum, 122 73. Elephas primigenius (_Great British Elephant_), 127 74. Trogontherium Cuvieri (_Gigantic Beaver_), 128 75. Ursus spelæus (_Cave Bear_), 128 76. Hyæena Spelæa (_Cave Hyæna_), 129 77. Asaphus caudatus, 134 78. Orthoceras laterale, 134 79. Spirigerina reticularis, 134 80. Ammonites margaritatus, 134 81. Ammonites bisulcatus, 134 82. Belemnitella mucronata, 134 83. Belemnites sulcatus, 134 84. Murex alveolatus, 135 85. Astarte Omalli, 135 86. Balanus crassus, 136 87. Astarte arctica, 152 88. Tellina proxima, 152 89. Norwegian Spruce (_Abies excelsa_), 153 90. Lepidodendron Sternbergii, 164 91. Calamites cannæformis, 165 92. Megatherium Cuvieri, 167 93. Skull of Dinotherium giganteum 168 94. Ammonites Humphriesianus, 242 95. Encrinites moniliformis, 243 96. Cupressocrinus crassius, 243 97. Pentacrinus fasciculosus, 245 98. Chamfered and Imbricated Scales, 246 99. Scale of Holoptychius giganteus, 247 100. Section of Scale of Holoptychius, 248 101. Sigillaria Groeseri, 255 102-104. Whorled Shells of the Old Red Sandstone, 256 105. Murchisonia bigranulosa, 258