INDEX 



619 



Shull, G. H.', 43, 332, 335 



Siemens, R., 481 



Sinanthropus pekinensis, 159 



Smith, E. A., 41 7, 423-24 



Smith, G., 227 



Solidago viguarea, 402 



Somatogenic reproduction, 197-98 



Species, definitions of, 97-98 



Spencer, H., 4, 19, 28-29, 273, 403-4 



Spermatid, 205, 207 



Spermatocyte, 205, 207 



Spermatogenesis, 203-5 



Spermatogonium, 205, 207 



Spermatozoon, 106, 205, 207 



Spiranthus, 332 



Spontaneous generation, 12 



Sports, 38 



Sprengel, C. K., 374 



Standard deviation, 454-55 



Staples-Brown, R., 249 



Statistical study: of evolution, 184; of 



variation, 556-61; of heredity, 470- 



75 

 Stegodon, 140-43 

 Steinach, E., 228 

 Steinmann, G., 6 

 Stejneger, 93 

 Sterilization laws, 528-29 

 Stockard, C. R., 413 

 St. Helena, fauna of, 170-72 

 St. Hilaire, E. G., 21-22 

 Strangeways, T. S. P., 101 

 Strongylocentrotus, 303 

 Sturtevant, A. EL, 285, 290 

 Subsidizing the fit, 528-29 

 Swainson, 98 

 Synapsis, 204, 566 

 Systema Naturae, of Linnaeus, 93 



Tail, vestigial in man, 81-S2 

 Talent, the production of, 534-36 

 Tasmanian wolf, 103 

 Tayler, J. L., 391-93 

 Taxonomy, the method of, 95-96 

 Teleology, 13 

 Telophase of mitosis, 195 

 ^^rmites, 378 

 Tetrads, 204 

 Tetraploid mutations, 329 



Thales, 11 



Thayer, G. H., 361-63 



Theologians, the early Christian, 14, 15 



Thompson, A., 82 



Thomson, J. A., 160, 232-37, 245-52, 

 370-82 



Tibia, flattening of, in man, 91 



Titanotheres, 426-27 



Tomes, C. S., 90 



Tower, W. L., 215-16, 324 



Toyama, K., 245-47 



Translocations, 187 



Trihybrid ratio, 243-44 



Trilophodon, 139-42 



Triploid mutations, 329 



Trisomic mutations, 329 



Tschermak, 40, 43, 245 



Turner, Sir W., 90 



Twins: evidences from, in support of 

 classification, 9S; and the fundamen- 

 tal assumption of evolution, 54, 55; 

 and the relative potency of heredity 

 and environment, 485-90; method of 

 studying human heredity, 455, 480- 

 90 



Typhlopidae, 95 



Uniformitarianism, 22-23 



Unit characters, Mendelian, 238 



Urtica dodarli, 247-49; U. pilulifera, 



247-49 

 Urschleim, 12, 16 



Vasectomy, 528 



Vestigial structures, evidences from, 52, 

 69-92 



Virchow, R., 154 



Vitalistic theories, 428 



Von Verscheur, 480 



Wagner, M., 43 2 ~33 



Walcott, C. W., 125-26, 132 



Wallace, A. R., 17, 26-27, 36, 98, 160- 



63, 173-76 

 Waller, H. E., 285, 472, 521-31 

 Weismann, A., 3, 7, 30-32, 202, 309-n, 



398,408 9 

 Weismannism, 7, 202, 309-11 

 Weldon, W. F. R., 394-95 



Whales, comparative anatomy of, 60- 

 62; embryology of, 120-21 



White, G., 370, j7<J-77 



