524 



INDEX 



Ideal vertebrate, 132, 133 



Iguana, 122 



Iliac artery, 171 



Ilium, 141, 142, 357 



Imbecility, 197, 198, 421 



Immunity, 286, 342, 343 



Inbreeding, 289, 297, 383 



Inch-worm, 327, 328 



Incomplete dominance, 299 



Incomplete metamorphosis, 97 



Incubation, 253 



Incus, 213 



Independent assortment, 292-297, 



300, 315 

 Individual, 27, 29, 73, 232, 350, 375 

 Infantile paralysis, 391 

 Influenza, 39 1 

 Infundibulum, 202, 203 

 Infusoria, hb, 47, 53-56, 477; See: 



Paramecium 

 Ingenhousz, 463 

 Inhalation, 164 

 Inhalent siphon, 88 

 Inheritance, 281-315, 377-384, 420- 



425, 468-470; See: Genetics 

 Inner ear, 212, 213 

 Insanity, 217 

 Insect, 91-94, 161, 162, 324-335, 



340, 372, 392, 404-413, 453, 478; 



beneficial, 413-417; injurious, 405- 



413, 417, 420 

 Insectivora, 128, 129, 427, 430, 479 

 Instinct, 346 

 Insulin, 197, 367 

 Integumentary system, 65 

 Intelligence, 343, 347 

 Internal secretion, 159; See: Hor- 

 mone 

 Intersex, 306 

 Interstitial growth, 25 

 Intestinal juice, 155 

 Intestine, 64, 105, 146-149, 171, 441 

 Invention, 444 

 Invertebrates, 66-109, 188, 214; See: 



Hydra, Earthworm, and Crayfish 

 Involuntary muscle, 139 

 Iodine, 197 

 Iris, 215, 217 

 Iron age, 444 

 Irritability, 26, 27, 64, 344, 347; See: 



Nervous system 

 Ischium, 142 

 Islands, 372 



Japanese beetle, 409 



Java man, 432, 433 



Jaws, 112, 141, 151; See: Skull 



Jellyfish, 72-75 



Jennings, 346 



Jerboa, 321 



Jigger flea, 405 



Jimson weed, 310 



Johannsen, 380 



Jugular vein, 171 



Julus, 92 



Jurassic period, 359-361 



Kallikak family, 421 



Kallima, 326, 327 



Kangaroo, 127, 321 



Karyolymph, 20 



Katabolism, 25, 182; See: Metabolism 



Katydid, 325 



Kidney, 146-149, 168, 172, 180, 182- 



187, 192, 194; evolution, 183-187 

 Kinetic energy, 14, 25, 502; -See: 



Energy 

 King crab, 95 

 Kingsnake, 123 

 Kircher, 218 

 Kissing bug, 94 

 Kiwi, 124 

 Knee cap, 142, 144 

 Koala, 127 

 Koch, 391 



Labellum, 330 



Labial palp, 330 



Labium, 93 



Labrum, 93, 330 



Labyrinth, 212, 213 



Lacewing fly, 94 



Lacrymaria, 54 



Lactase, 156 



Lacteal, 157, 158 



Ladybird beetle, 414 



Lagena, 212 



Lamarck, 3, 46, 286, 373-375, 458, 



472-474 

 Lamprey, 113, 252 

 Lamp-shell, 83 

 Laplace, 98 



Larva, 397, 398, 407, 415 

 Larynx, 149, 162, 358 

 Lateral, line, 210; plate, 269 

 Laveran, 392 

 Lavoisier, 461 



