INDEX 



451 



Goldschmidt, 323 



Gonads, effects of removal, 334 



Goniatites, 133 



Gorilla, 189, 190; skeleton, 192 



Grasshopper, 220, 243; jumping leg 



of, 218 

 Great Salt Lake desert, 255 

 Greek philosophers, 5 

 Gregariousness, 238 

 Gregory, W. K., 188 

 Gregory of Nyssa, 8 

 Guinea-pigs, inheritance in, 282, 283; 



ovarian grafts in, 421 

 Guyer, 382, 421 

 Gynandromorphs, 332, 333 



Hair, and scales, 83, 84; persistent, 87; 



form of, 267 

 Halohntcs, 254 

 Handlirsch, 136, 140 

 Hapalidae, 188 

 Hare, prairie, 242 

 Harmful characters, 389 

 Harvey, 8 

 Heart, of vertebrates, 61; diagram, 



6'2; human, development of, 63 

 Hefner, 364 



Heidelberg man, 202; jaw of, 202 

 Height, inheritance of, 271 

 Hellgramites, 211 

 Helm, W. B., 266 

 Hemimetabola, 136 

 Hemiptera, adaptive branching in, 253 

 Hemp, sex reversal in, 336 

 Herbert, 409 

 Hereditary bridge, 274 

 "Hereditary Genius," 369 

 Heredity, 15, 264; chromosome the- 

 ory of, 2S0; in man, 359 

 Heritability, importance in genetics, 



270 

 Heritage, 2; latitude of, in evolution, 



435; and existence, 436; subject to 



change, 439 

 Hermaphrodites, 332 

 Hermit crab, 240, 241 

 Hesperopiihecus haroldcooki, 201 

 Heteroceras, 133 

 Heterosis, in plants, 342; in animals, 



348 

 Heterozygous, definition of, 279 

 Himalaj'an mountains, 257 

 History of evolution, 5 



Jlipparion, 181, 183 



Ilippidion, 182, 183 



Hoatzin, 157; young, climbing, 156 



Holmes, 368, 369 



Holometabola, 136 



Hominidae, 188 



Homo, see man; heidelbergensis, 202; 

 jaw, 202; phylogeny 204; neander- 

 thalensis, 202, 204; skull and skele- 

 ton, 205; phylogeny, 204; restora- 

 tion, 200; sapiens, 26; sapiens, 

 Cro-Magnon race, 206; relation to 

 Neanderthal man, 206; restoration, 

 200; phylogeny, 204 



Homologies, significance of. 111 



Homology, 27 



Homozygous, definition of, 279 



Homozygous crosses, 356 



Honey-bee, 21; sting, 238; organiza- 

 tion of colony, 239; hybridization 

 in, 347; selection in, 351 



Hoofs, 85 



Hooke, 8 



Hormones, 94; and secondary sexual 

 characters, 314, 334; effects of in- 

 sufficiency, 334 



Hornbills, 396 



Horns, as weapons, 237 



Horse, adaptive structure, 175; teeth, 

 177; skull, 177; evolution of, 176; 

 protective adaptations, 236; ortho- 

 genetic variation in, 268; selection 

 in, 351, 352; South American 

 horses, 182; North American 

 horses, 182; extinction of, 184; and 

 mule, 345 



Humming bird, ruby-throat, 394 



Huxley, 15 



Hybridization, 274; practical value 

 of, 341; of domestic animals, 345; 

 limitations of, 348 



Hybrids, heterosis in, 342; asexual 

 propagation of, 350; infertility of, 

 349 



Hydra, 34, 51, 55; asexual reproduc- 

 tion in, 273, 274; clones in, 356; 

 and continuity of germ plasm, 422; 

 variation in, 265 



Hylobates, 189 



Hyoid arch, 54, 75 



Hypohippus, 180, 183 



Hypopharynx, of Anopheles, 234 



Hyracotheriuin, 176, 183 



