INDEX 



425 



Ichthyornis victor, 290 * 



Ichthyosauria, 17 *, 216, 217, 218 



Ichthyotomi, 110 



Icterus baltimore, 311 * 



Idiacanthus ferox, 136* 



Iguana tuberculata, 248 *, 253 



Iguanodon, 221, 222 * 



Incus, 325 



Insectivora, 340, 346, 360 



Integument, of fishes, 109, 110; of 

 Teleostomi, 128; of turtle, 226-228; 

 of Crocodilia, 242, 243; of mam- 

 mals, 325-328; of armadillos, 376 



Internal gills, 107 *, 108; of frog larva, 

 207, 208 * 



Isospondyli, 137 



Jacana, 302 



Jerboa, 372 * 



Jordan, D. S., 137, 138, 144, 147 



Jungle-fowls, 299, 300 



Kangaroos, 358 *, 359 



Keeled Birds (see Neornithes car- 



inatae) 

 Kellicott, W. E., viii, 43, 44, 45, 46, 



47 



Kestrels, 298 

 Killifishes, 111, 142 * 

 Kingsley, J. S., viii, 103 

 Kite, red, 293 * 

 Kiwi (see Apteryx) 

 Knowlton, F. H., 289, 305 

 Koala, 358 *, 359 



LaUdosaurus, 215 *, 216 



Labyrinthodonta, 181 



Lacerta viridis, 248 *, 249 



Lacertse, 247-253 



Lacertilia, 246-255 



Lagomyidse, 371 



Lampreys (see Petromyzontia) 



Lanarkia, 169 *, 170 



Lancelets (see Amphioxus) 



Lappet-fins, of Cladoselache, 120 



Lari, 302 



Larva, of Amphioxus, 46 *, 47 *; of 

 Petromyzon, 38; of Polypterus, 129, 

 130 *; of Protopterus, 155 *, 156; of 

 Lepidosiren, 155 *, 156; of frog, 

 206 *, 207, 208 



Larvacea, 33, 50 



Lasanius, 169 *, 171 



Lateral line organs; of Cyclostomata, 



88; of fishes, 101; of Squalus, 118 

 Leatherback turtle, 234-235 * 

 Lemur varius, 380 

 Lemur, 378, 379 *, 380; Smith's dwarf, 



379 *; ruffed, 380; mouse, 380 

 Lemuroidea, 346, 378, 379 *, 380 

 Lepidosiren paradoxica, 112, 155 *, 156, 



158, 159 



Lepidosteidse, 133 

 Lepidosteus, 134 *; eggs of, 164 

 Leporidse, 371 

 Life zones of fishes, 97 

 Lillie, F. R., 24 



Limax lanceolatus (see Amphioxus) 

 Limicolae, 302 

 Limulus, 77, 79, 170 

 Linophryne lucifer, 136 * 

 Lissamphibia, 180, 183 

 Liver diverticulum of Amphioxus, 34 *, 



39 

 Liver, of Ammocoetes, 95; of Squalus, 



116 

 Lizards, 246-255; wall, 248*, 249; 



Galapagos sea, 250 *, 252 

 Lizard-tailed bird, 277, 278 

 Llamas, 390 

 Lobe-fin, 105 

 Lobe-finned ganoids (see Crossopter- 



ygii) 



Loons, 292, 293 *, 294 

 Loricata, 376, 377 

 Loxomma, 180, 182 

 Lull, R. S., viii, 20, 21, 79-81, 223, 224, 



338, 339 



Lung-fishes, 112, 154-159 

 Lutra canadensis, 367 * 

 Lyre-birds, 310, 311 *, 312 



Macaques, 381 



Machaerodontia, 370 



Mackerel, 111, 147 



Macrochelys temmincki, 236 



Macropodidse, 359' 



Macropus rufus, 358 *, 359 



Mceritherium, 396, 397 * 



Malacopterygii, 111, 135, 137-139 



Malleus, 325 



Mammalia, 13, 33, 68, 69, 324-411; 

 characterization of, 324, 325; dis- 

 tinguishing characters of, 325, 326; 



