INDEX 



657 



methods of controlling, 587-588 



predatory as carriers, 618-619 

 Insertion, of muscle, 337, 338 

 Inspiration, 318 

 Insulin, 296 

 Insight, 365 

 Intelligence, definition of, 384-385 



in apes, 386-388 



in man, 388 



measure of, 389 

 Intelligence quotient, definition of, 388 

 Intercostal muscles, 318 

 Interference, in heredity, 457 

 Intermediate lobe, pituitary, 402 

 Intermedin, 402 

 Internal nostrils, 287 

 Internal respiration, 312, 316 

 Inter-relationships 



between members of same species, 

 45-48 



between plants and animals, 59 

 Interrenal, adrenal, 392 

 Interstitial cells, 399 

 Intestinal glands, 295 

 Intestine 



earthworm, 189 



insect, 209 

 Intracellular excretion, 320 

 Inversion, in heredity, 457 

 Invertase, 297 



Invertebrate nervous systems, 340 

 Invertebrates, 103, 328, 335 

 Iodine, 277 

 Iris, 359, 492 

 Iron, 277 

 Iron age, 547 



Islands of Langerhans, 296, 397 

 Isolation, 518, 523 

 Isolecithal, 418, 4^1 

 Isoptera, 100 



Isosmotic, definition of, 136 

 Italians, 561 



Jacana, 487 



Japanese beetle, range of, 583, 585 



Japanese chestnut blight, 580 



Jastrow, Joseph, 437 



Java man, 555-556 



Jaw, Heidelberg, 556, 565 



Jaws, 329 



Jbrhs 407 



Jellyfi'shes, 81, 103, 333, 485, 507 



Jenner, Edward, 628 



Jennings, H. S., 369, 464 



Jews, 561 



Johannsen, 457 



Jones, D. F., 572 



Jordan, 523 



Jordan and Kellogg, 29 



Jugular vein, 304 

 Jungle-fowl, 515 

 Jurassic period, 476, 513 



Kala azar, 620 



Kangaroo, 542 



Katabolism, definition of, 126 



Katydid, 524 



Kellogg, Vernon L., 524 



Kelvin, Lord, 562 



Kendall, 394 



Kidneys, 321, 322, 323, 488, 498 



Kingsley, 499 



Kipling, 505 



Kiwis, 113 



Klamath River, fishing in, 15 



Knight, 442 



Knight, experiment of, with plants, 371- 



372 

 Koch, R., 622 

 Koelreuter, 442 

 Kohler, W., 386-387 

 Krakatao, re population of, 34-35 

 Krogh, 303 



Labellum, 203, 205 

 Labial palps, 203, 205 

 Labium, 201, 203, 205 

 Labrum, 201, 203, 205 

 Lachrimal gland, 360 

 Lactase, 297 

 Lactation hormone, 400 

 Lacteals, 291, 292, 298 

 Lactic acid, in muscles, 339 

 Lake-dwellers, 452 

 Lamarck, 516, 517, 519, 522, 526 

 Laminaria, 71 

 Lamprey eel, 221 

 Lamp-shells, 91, 328 

 Land-inhabiting forms, 333 

 Language, 551 

 Lankesteria, 77 

 Lanugo, 488, 501 

 LaPlace, 312, 407 

 Large intestine, 291, 292 

 Larva 



bee, 212 



coelenterates, 186 

 Larynx, 329 

 Lateral fold, 426 

 Lateral line, 363 

 Lavoisier, 312 

 Law of Priority, 66 

 Leaf 



adaptations for movement in, 374 



cross section of, 252 



functions of, 253-270 



of sensitive plant, 374 



structure of, 251-253 



