Ichthyornis, 76 Ichthyosaurus, 6, 191 Iguanodon, 209; pelvis, 206 Ilium, 93, 95, 96, 98, 204 Instep, 105, 207 Inherited characters, 217 Interclavicle, 111 Ischium, 93, 96, 203, 204 Isle of Wight, 174 J Jaw, in birds, 12; in fishes, 13; in mammals, 12; in reptiles, 13; in pterodactyles, 63; suspension of, 11, 74, 76 -- lower, 75 K Kansas, Chalk of, 72, 103, 115; University Museum of, 181 Kelheim, 32 Keuper, 33 Kimeridge Clay, 132 Kingfisher, 63 Kiwi, 23 L Labyrinthodontia, 191 Lachrymal bones, 67 Laramie rocks, 34 Largest ornithosaur, 133 Lateral vacuities in skull, 147 Lawrence in Kansas, 181 Lengths of bones, 146 Lepidosiren, 17 Lias, 33 Lithographic Slate, 35, 156 Lizards, 20, 21, 27, 123 Llama, neck of, 79, 83 Loach, swim bladder of, 52 Lower jaw, 12, 74, 76, 149 Lumbar vertebræ, 89 Lungs, 47; in apteryx, 48; in chameleon, 51; in ostrich, 49; in reptiles, 8, 9, 51 Lydekker, R., 160, 169, 231 Lyme Regis, 33 M Macrocercus, palate of, 71 Malar bone, 67 Mallard, 22 Mammal, 8, 12, 24, 79, 53, 95 Mammalia, 38, 141 Mammalian characters, 12, 220 Mammoth, 141 Manis, 40, 57, 142 Manubrium of sternum, 108, 109, 183 Marrow bones in a bird, 134 Marsh, Professor O. C., 31, 72, 90, 115, 121, 131, 140, 160, 165, 180, 181, 210, 231 Marsupial, 70, 94, 99 Megalosaurus, 129, 198 Merganser, 108 Merry-thought, 114 Metacarpus, 116, 124, 126, 128, 130 Metatarsal bones, 104, 207, 208 Meyer, Hermann von, 31, 45, 46, 85, 105, 108, 121, 160, 192, 231 Moa of New Zealand, 35 Mole, humerus, 38; sternum, 107 Monotremes, 70, 94, 111, 121, 185, 218 Mososaurus, 77 Movement of the leg, 101 Mugger, 137 Munich Museum, 32, 159 Munster, von, 231 Muschelkalk, 184 Museum, 32, 156, 231, 159; Natural History, 133, 231 Myrmecophaga, 185 N Names of genera, 183 Natural History Museum, 38, 231 Neck, 79; in Dimorphodon, 145; in Giraffe, 39; in Llama, 79; in Pterodactyles, 80; in Whales, 39 Newton, E. T., 55, 70, 158, 160, 201, 232 New Zealand Bat, 25 -- -- Hatteria, 68 Niobrara rock, 183 Nostril, bones round the, 62; small, 147 Notarium, 87, 115 Nothosauria, 192 Nusplingen, 32 Nyctodactylus, 115, 180 O Obliteration of characters, 216 Opercular bones, 13 Ophidia, 52, 191 Optic lobes, 53, 221 Organs of flight, 17 Ornithischia, 190, 198 Ornithocephalus, 166 Ornithocheirus, atlas and axis, 81; brain, 55, 69; carpus, 124; cervical vertebra, 83, 179; claw phalange, 129; coracoid, 109; femur, 100; pelvis, 98; pubic bones, 194; sternum, 109; shoulder-girdle, 115; remains, 176; teeth, 74, 76; absence of teeth, 138 _Ornithocheirus machærorhynchus_, 139; _microdon_, 139 Ornithocheiroidea, 193