INDEX 



395 



hopper-dozers, 14 

 horned toads, 179, 180 

 hornets, 65 

 horse, evolution of, 353, 354 



improvement of, 356 

 horse flies, 44 

 horse-hair snake, 124 

 house fly, 40, 41, 42 

 Hudson, W. H., 191 

 humerus, 290 



Huxley, T. H., 84, 230, 238 

 Hydra, 130-133, 240, 241, 276 

 Hydra viridis, 133 

 hydrogen, 234, 236-238 

 hydroids, 130, 133-135 

 Hydrophilidae, 55 

 hydrophobia, 326, 327 

 Hyla, 175 

 Hylidae, 174, 1 75 

 Hymenoptera, 56-69, 338 

 hyoid bone, 347, 348 



ichneumons, 69 

 imago, 12, 73 

 immunity, 326 

 incubation, 188-190 

 Infusoria, 141-144 

 insanity, 303, 377, 378 

 Insectivora, 216 

 inspiration, 274 

 instinct, 190, 191 

 intelligence, seat of, 300-303 

 internal secretion, 280-282 

 intestine, of clam, 100 



of crayfish, 87 



of earthworm, 116, 117 



of grasshopper, 7 



of man, 249, 251 

 Invertebrates, 153, 348 

 iodine, 236 

 iris, 307 

 iron, 236 



Isopoda, 93 

 itch mites, 83 



jaws, 76, 84 



jelly fish, 130, 134, 135 



Jenner, .,328 



Jordan, O. S., 167, 168. 360 



Jukes family, 380, 382 



June-bugs, 51, 53 



K 



Kallikak Family, The, 379, 380, 



382 



Kallima butterfly, 363 

 kangaroos, 213 

 katydids, 13, 14 

 kidneys, 8, 100, 277-281 

 kissing bug, 32 

 Kitchener, 312 

 Koch, R., 323 

 Koebele, 38 

 Krsepelin, 312 



labial palpi, of grasshopper, 3, 4 



of clam, 99, 100 

 labium, 4, 31, 58 

 Lacertilia, 176 

 lachrymal glands, 306 

 lacteals, 266 

 lady beetles, 54 

 lamellae, 98 

 lamellibranch, 98 

 lampreys, 156, 157 

 lancelet, 155 

 larvae, of amphibians, 175 



of clam, 101 



of echinoderms, 113 



of tunicata, 154 



of insects, 12, 20, 21, 26, 

 28, 29, 30, 41-49, 51, 

 52, 62, 66, 67, 70-74 

 larynx, 272 



