INDEX 
Steinach, E., 454 
Steinmann, G., 6 
Stejneger, 117 
Sterilization laws, 479, 480 
Stock on graft, no influence of, 333, 334 
Stockard, C. R., 322, 335 
St. Helena, fauna of, 107-9 
St. Hilaire, E. G., 21, 22, 220 
Strangeways, T. S. P., 125 
Sturtevant, A. H., 437 
Subsidizing the fit, 480-82 
Survival of the Fittest, 223-30 
Swainson, 122 
Synapsis, 298, 407 
Systema Naturae, of Linnaeus, 117 
Tail, vestigial in man, 152, 153 
Talent, the production of, 499, 500 
Tasmanian Wolf, 127 
Tayler, J. L., 253-56 
. Taxonomy, the method of, 119-20 
Teleology, 13 
Termites, 214, 215 
es acne theory of Osborn, 274, 275- 
3 
Thales, 11 
Theologians, the early Christian, 14, 15 
Thompson, A., 153 
Thomson, J. A., 97, 191, 205-18, 323- 
30, 380-85, 393-400 
Tibia, flattening of, in man, 162 
Tomes, C. S., 161 
Tower, W. L., 321, 322, 360, 361, 377 
Toyama, K., 393, 395 
Trihybrid ratio, 391, 392 
Trilophodon, 76, 77, 78, 79 
Tschermak, 40, 43, 380, 393 
Turner, Sir W., 161 
Tuttle, E., 483 
Twins, evidences from in support of 
classification, 122 
Typhlopidae, 119 
Uhrschleim, 12, 16 
Uniformitarianism, 22, 23 
Unit characters, Mendelian, 386 
Urtica dodarti, 394, 395; U. pilulifera, 
394, 395 
523 
Vanessa 10, 314, 315 
Variation, 307-22; classification of, 
308-11; concept of, 308; continuous 
and discontinuous, 311, 346; and 
development, 311; and environment, 
312; germinal, 308; nature of, 309, 
310; polygons of, 366, 367; somatic, 
308; statistical study of, 365-70; 
universality of, 307, 308 
Vasectomy, 479 
Vestigial structures, evidences from 
60, 140-63 
Virchow, R., 91, 240 
Volta Bureau, 474 
Wagner, M., 269, 270 
Walcott, C. W., 62; 64, 67 
Wallace, A. R., 17, 26, 27, 36, 97-100, 
IIO-13, 122, 239 
Walter, H. E., 373, 473-83 
Warning coloration, 202, 203 
Weismann, A., 3, 7, 30, 31, 32, 195, 247, 
258, 260, 263-68, 281, 330-31, 428 
Weismannism, 7 
Weldon, W. F. R., 256, 257 
Whales, comparative anatomy of, 131- 
33; embryology of, 179, 180 
White, G., 206, 212, 213 
White, T. H., 320 
Whitman, C. O., 35 
Whitney, D. D., 335 
Whymper, 479 
Wilberforce, Bishop, 28, 29 
Williston, S. W., 35, 83, 85 
Wilson, E. B., 6, 44, 401 
Wings, comparative anatomy of, 134 
Woltereck, R., 315, 316, 335 
Woods, F. A., 466-72 
Woodward, 88, 92 
Woolner, 155 
Wordsworth, W., 507 
Wright, Sewall, 164, 165 
Wyman, Professor, 150 
Xenophanes, 12 
Zea mays, 395 
Ziegler, E., 326 
Zoéa larva of Peneus, 170 
Zygote, 165, 297 
