INDEX 



551 



Structure, see Analogy; Homology; Mor- 

 phology 

 Struggle for existence, 353-357, 358, 364 



See also Natural selection 

 Sturgeon, 156 

 Sturtevant, A. H., 363 

 Subphylum, 311 



Subpopuiation, 446. 485-486, 489-490, 

 505, 506 



See also Numbers; Population 

 Subspecies. 250, 255, 320-327, 350, 358, 

 444-445, 485, 486 

 clusters of, 325-326. 327, 485 

 evolutionary significance of, 325-327 

 and microgeographic races. 324-325 

 versus cline, 323 

 Success, in evolution. 453; criteria of, 



355-356 

 Sugar, see Carbohydrates; Glucose 

 Sullivan. J. W. N., 523 

 Sumner, F. B., 322, 329 

 Sun. see Energy 

 Sunfish, marine. 416-417 

 Survival, by cooperation, 355, 520-522 

 of the fittest, 4, 355-356 

 by protective coloration. 364-373 

 random, see Drift, genetic 



See also Natural selection 

 Suture, see Shell 

 Swanscombe people, 249 



See also Skull 

 Swift. J., 229 

 Synapsida, 176, 178 

 Synapsis, 382, 387, 394, 398 

 Systematics, see Classification 

 Systemic mutation, see Mutations 



Tachytelic rate, 502 



See also Evolutionary change, 

 rate of 

 Tadpole, 92. 163 



external gills in, 163 



retinal pigments in, 106 

 Tail, of birds, 188 



human, 76; embryonic, 59, 60, 65, 66, 

 75 



of New World monkey, 223. 259 



of Old World monkey, 223 



of Stegosauria, 183 



of thecodonts. 178 



vestigial. 43 

 Tameness. 351 

 Tapir. 200. 210. 260 



distribution of. 269-270 

 Tarsier, 220, 221, 222, 224, 225 



spectacled, 221 

 Tasmanian aboriginal. 234 

 Tasmanian devil, 263, 264 



Tax, S., 363.483.507 

 Taxonomy, see Classification 

 Teeth, of apes. 229-232 



of australopithecines, 234, 235 



of birds, 188 



of Cro-Magnon man, 245 



deciduous, 210 



of Dinotheiiim, 212, 214 



of elephant, 208, 209-210, 215 



of Gomphotheritim, 213 



of gorilla. 231 



of Homo sapiens, 229-232, 231 



of horse. 199-200. 201, 410, 412, 413 



of Hypohippits, 410 



of Hyracotheriiim, 201 



of labyrinthodonts and crossopterygi- 

 ans. 160-161 



of Lagomorpha and Rodentia, 1 17 



of mammoth, 215 



of mastodon. 215. 216 



of Merychippiis, 205, 410, 412, 413 



of Mesohippiis, 203 



"milk." 210 



of Miohippiis. 205 



of Moeritheiium. 210, 212 



of New World monkey, 223 



of Oreopitlieciis. 228 



of Ornithischia, 182 



of Parahippiis. 205 



permanent, 210 



of Phioinia and Paleomastodon, 212 



of Pithecanthropus, 239 



of Pliohippus, 206 



of Sauropoda, 181 



of Stegodon, 215 



of therapsids, 171 



of Tyrannosaurus, 181 

 Teissier, G., 457, 458, 462, 463, 482 

 Teleosts, see Fish, bony 

 Temperature, body, regulation of, 170, 



171. 185, 187, 275-276 

 Temporal fossa, of cotylosaur, 176 



of Diapsida, 178 



of primates. 221 



of thecodonts. 178 



of therapsids. 171, 176, 775 

 Territories. 318. 321. 350. 445-446, 470, 

 485,488,493 



See also Ranges; Subspecies 

 Tertiary, 135, 137, 194. 228, 267, 270, 



272 

 de Terra, H., 257 

 Testes. 343 

 Tetraploid, 399, 400. 418. 4/9-420 



See also Polyploidy 

 Thecodonts. 777, 178-179 

 Therapsida, 137, 171-172, 777. 189-190, 

 504 



