680 



INDEX 



Ginkgoes, 414, 598, 620; 415, 594 

 Glacial ages, glacial epoch (see Pleistocene 



epoch) 

 Glaciation, causes of, 492 



Permian, 413 



Pleistocene, 488-493 

 Glands, 22; 23 



digestive, 66-72 



ductless, endocrine, 125-133 



of internal secretion, 125-133 



salivary, 65, 68; 67 



of skin, 51; 23, 50 

 Glomerulus, 78; 79 

 Glossopteris, 413 

 Glucose, 137, 169 



in blood, 129-131 



and cortisone, 130 



and insulin, 129 



manufacture of, by plants, 137, 169- 

 171 



and muscular contraction, 44 



substances synthesized from, 172-174 

 Glycogen, 44, 72 



and adrenalin, 131 



in blue-green algae, 599 



in liver, 72, 131 



and muscular contraction, 44 

 Glyptodonts, 491 

 Goiter, 130, 317 

 Golgi bodies, 17 

 Gonads, 215, 245; 185, 424 



hormones of, 133, 245-249 

 Gorilla, 479-482; 484, 485, 494~496 

 Grasses, 417, 598, 621-623 



and grazing mammals, 417, 468 

 Grasslands, Cenozoic spread of, 417 



in Pleistocene, 490 

 Gray matter, 121, 123; 117 

 Grimaldi Negroids, 503, 538 

 Ground pines, 410, 412, 597, 612 

 Ground sloths, 491, 512 

 Growing point, 143; 144 

 Growth, 13, 401 



indeterminate, in plants, 139 

 Guard cells, 168; 167 

 Gut (see Enteron) 

 Gymnosperms, 135»., 415, 598, 616-617 



stems of, 158 



H 



Hair and hair follicles, 51, 360, 456; 50 

 Hair texture, inheritance of, 322 



racial traits in, 511, 512 

 Hand, human, 35-36, 38; 30, 39 



in primates, 471-472 

 Haploid, 219, 221, 222, 291-292; 217, 220 



in gametophyte, 254, 256, 271 



in plant spores, 257-260, 269, 271 



Haustoria, 202, 605 



Haversian canals, 28; 29 



Head end, formation of, 191 



Head form, racial traits in, 511-513 



Hearing, 109, 112-114 



Heart, 84-86; 25, 89, 183, 185, 424 



development of, 238, 251 

 Heartbeat, 84, 95-96; 86 



power and rate of, 95, 131 

 Heartwood, 157 

 Heat produced by muscles, 48 

 Heidelberg man, 496, 497, 505; 485, 542 

 Hemoglobin, 76, 82, 368 

 Hemophilia, 98 



inheritance of, 292 

 Hepatic portal vein, 88; 89 

 Herbivores vs. carnivores, 463 

 Herbs, Cenozoic rise of, 417 

 Herding, 534 

 Heredity, 277 



and environment, 316-319 



in man, 318-325, 511 



and variation, 277 

 Hermaphroditism, 223 

 Heterogametes, 256 

 Heteroploidy, 313 

 Heterozygote, 283 

 Heterozygousness of population, 346, 347, 



351 

 Highways and barriers, 381-384 



and speciation, 350-351, 384-386 

 Histamine, 132 

 Holdfast, 195, 196, 601 

 Hominidae, 482, 666 

 Homo (mankind), 495, 507, 666 



erectus erectus, 495; 502 



erectus pekinensis, 495; 502 



heidelbergensis, 497; 502 



neanderthalensis , 497-500; 502, 505 



rhodesiensis, 497, 500; 502 



sapiens, 494, 498, 500-537; 485, 497 

 antiquity of, 501, 507 

 evolutionary trends in, 528-536 

 as species, 507-537 

 subspecies and races of, 508-528 



soloensis, 497, 498; 502 



steinheimensis, 498; 502 



(See also Man; Mankind) 

 Homology, 356-359 



and analogy, 355, 358-359; 360, 379 



embryonic, 361-368 



physiological, 368-371 



in repeated parts, 38, 357; 39 



in vertebrate skeleton, 358-359; 357 

 Homozygote, 283 

 Hormones, 69n., 125-133 



adrenocorticotrophic (ACTH), 129 



androgenic, 245 



