(_Principally to Forms of Life noticed or illustrated._) Agnostus, 79 Alethopteris, 105 Ammonites, 76 _Amphibians_, 152 Amphipeltis, 85 Ancyloceras, 77 Antholithes, 101 Anthozoa, 57 _Angiosperms_, 187 Anthropalæmon, 85 _Antiquity of Man_, 247 _Apes_, 228 Arachnida, 150 Archæocyathus, 38 Archæopteryx, 172 Archegosaurus, 153 Archimulacris, 146 Arctocyon, 228 Asterophyllites, 103 Astylospongia, 51 Athyris, 67 Baculites, 77 Baphetes, 155 Bathygnathus, 174 _Batrachians_, 152 _Bats_, 226 _Beetles_, 145 _Beginning of Life_, 23 Belemnites, 78 Beryx, 133 Beyrichia, 83 _Birds_, 172 _Bivalve shells_, 69 Blattina, 146 _Brachiopods_, 63 Brontotherium, 217 Buthotrephis, 92 _Butterflies_, 150 Calamites, 99, 105 Calymene, 80, 82 Campsognathus, 179 Carcharodon, 132 Cardiocarpum, 101 Cephalaspis, 122 _Cephalopods_, 71 Ceratites, 75 Ceratodus, 126 Ceteosaurus, 178 Cinnamomum, 198 Clidastes, 169 _Cockroaches_, 146 Conocephalites, 79 _Conodonts_, 118 _Corals_, 55 Cordaites, 110 Coryphodon, 215 _Crinoids_, 61 Crioceras, 77 Crustacea, 79 _Cuttle-fishes_, 71 Cyathaspis, 121 Cyathophyllum, 60 _Cystideans_, 62 Cythere, 83 Dadoxylon, 100 Dapedius, 132 Davallia, 192 Dictyonema, 53 Dikellocephalus, 79 Dinichthys, 127 Dinoceras, 216 _Dinosaurs_, 174 Dipnoi, 123 Discina, 66 _Dragon-fly_, 148 Dromatherium, 209 Dryopithecus, 229 Echinoderms, 61 Elasmotherium, 242 Elephants, 224 Eocene age, 213 Eopteris, 93 Eoscorpius, 151 Eozoon, 27 _Equine feet_, 218 Equisetaceæ, 97 Extracrinus, 64 Favosites, 59 _Ferns of Palæozoic_, 106 _Ferns, Tree_, 97 _Fishes_, 120 _Floras, distribution of_, 201 _Footprints_, 152 Foraminifera, 32 _Fruits of Devonian_, 101 _Ganoids_, 120 _Gastropods_, 70 _Glacial age_, 233 Glyptocrinus, 63 Glyptodendron, 94 Gomphoceras, 73 Graptolites, 53 Halisites, 59 Heliophyllum, 59 Heterocrinus, 63 _Horse_, 218 _Huronian age_, 24 Hydrozoa, 54 Hylonomus, 157 Ichthyosaurus, 167 Implements, 245 Insects, 139 Isotelus, 82 _Labyrinthodonts_, 155 Lamellibranchiata, 69 _Lampreys_, 117 _Land-snails_, 142 _Laurentian age_, 24 Lepidodendron, 108 Lepidosiren, 124 Leptophleum, 98 Libellula, 148 Lingula, 65 Liriodendron, 191 Lituites, 73 Loligo, 72 Machairodus, 227 _Mammals_, 207 _Mammoth_, 240 Man, advent of, 233 _Mantids_, 146 _Mares-tails_, 97 _Marsupials_, 207 Mastodon, 224 May-flies, 146 Megalosaurus, 1 Megaphyton, 107 Megatherium, 222 Microlestes, 208 Microsauria, 156 _Millepedes_, 145 _Modern forests_, 186 Monotremes, 208 Mososaurus, 169 Moths, 148 Murchisonia, 70 Myrica, 194 Nautilus, 71 Neuropteris, 105 Oldhamia, 52 Onchus, 121 Onoclea, 191 Oreodon, 221 _Origin of Life_, 23 Orthis, 66 Orthoceras, 73 Osteolepis, 124 _Ostracods_, 83 Otodus, 131