INDEX 



681 



Hormones, antidiuretic, 129 



blood-sugar-raising (BSRH), 129 



fat-metabolizing, 129 



follicle-stimulating (FSH), 129, 246, 

 248 



gonadotropic, 129, 245-246, 248-249 



interstitial - cell - stimulating (ICSH), 

 129, 246, 248 



intestinal, 132 



lactogenic, 129 



luteinizing, LH, 129n. 

 same as ICSH, 248n. 



pituitary, 128-129, 245-246, 248 



sex, in female, 246-249 

 in male, 245-246 



somatotrophic, 128 



thyrotrophic, 128 



trophic, 128 



water-balance, 129 

 Horse, evolution of, 464-469, 490, 491 



modern, 465-466, 469, 666; 357 

 Horsetails, 410, 412, 597, 611-612; 594 

 Host, 200, 565 



Host-parasite relationships, 576-578 

 Hottentots, mixed race, 526; 512 

 Humidity, relative, 554-555 

 Hutton, James, and uniformitarianism, 



334-337 

 Hybrid, 283 

 Hybridization, 316 



of human races, 536 

 Hydra, 181-182, 636; 533 

 Hydrochloric acid of stomach, 66 

 Hydrolysis, 175 

 Hyperthyroidism, 130 

 Hyphae, 408 

 Hypocotyl, 140 



Hypophysis, pituitary, 128; 122, 127 

 Hypotheses, rule of minimum, 335 



use of, in science, 5 



Ichthyosaurs, 440, 441, 631; 442, 443 

 Imbibition, 149 



Immortality, potential, of unicellular or- 

 ganisms, 213 

 Immunity and immunization, 99-100, 



102 

 Inbreeding, 314 

 Incus, 114, 457; 113 

 Independent assortment, 284-287, 289 

 Indonesian-Malay race, 520-521; 512 

 Infection and inflammation, 100 

 Inflorescence, 262, 267-268; 266 

 Inheritance, 317 



blended, 307-310 



of blood groups, 510-511 



Inheritance, and gene assortment, 290- 

 301, 346-347 



in man, 292, 317-325, 510-511; 293 



"non-Mendelian," 307-310 



physical basis of, 289-301 



and recapitulation, 365-367 

 Insectivores, 462, 470, 666; 485 

 Insects, 630, 652-655; 594 



of coal forests, 434-435 



as flower pollinators, 272, 570, 621 



larval specializations of, 367-368, 551 



metamorphosis of, 368, 435-436, 653- 

 654 



oldest known, 435 



primitive wingless, 435, 652 



winged, 652-655 



loss of wings by, 360 

 Insertion of muscle, 41; 45 

 Insulin and blood sugar, 129, 132 

 Integumentary system, 24, 48-54 

 Interglacial ages (see Pleistocene epoch) 

 Internode, 153 



Intestine, 69-72, 186; 67, 183, 185, 424 

 Invagination, 235 

 Invertase, 68, 70, 175 

 Invertebrates, 395; 594 

 Iris of eye, 110; 111 

 Irritability, 13 

 Islands of Langerhans, 132 

 Isogametes, 256; 255 

 Isolate or Mendelian population, 510 

 Isolation and isolating mechanisms, 349- 

 351 



and speciation, 349-351, 383-386 



Japanese, racial composition of, 519-520 

 Java man, 494-496, 505, 666; 485, 502 

 Java-Peking stock, 505-507, 516 

 Jaws, from gill arches, 240; 428 



human, 32, 483-484, 494, 513; 31 



of mammals, 457 



of primates, 472, 481, 484, 486; 483 

 Joint-necked fishes, 427, 630 

 Joints, 38^0 



Jordan's law or rule, 384-386 

 Jurassic period, 414, 441, 447, 449, 451 



K 



Kidney, 78-80; 25, 75, 89, 185 



Kingdom, 3, 596 



Kinship, precipitin tests of, 369-371 

 shown by homology, 355-371 

 taxonomy, expression of, 371-377 



Kromdraai man-ape, 486; 484, 485 



