6i6 



EVOLUTION, GENETICS, AND EUGENICS 



Talent, the pnviuction of, 583-84 



Tasmanian wolf, in 



Tayler, J. L., 262-65 



Taxonomy, the method of, 103-4 



Teleology, 13 



Termites, 196-97 



Tetrakinetic theory of Osborn, 283, 284- 

 92 



Tetraploid mutations, 491 



Thales, 11 



Thayer, G. H., 206-8 



Theologians, the early Christian, 14, 15 



Thompson, A., 90 



Thomson, J. A., 168, 197, 215-27, 339- 



44, 352-59, 449-56 

 Thorndike, E. L., 534, 544, 546 

 Tibia, flattening of, in man, 99 

 Tomes, C. S., 98 

 Tower, W. L., 337-38, 442, 503 

 Toyama, K., 352-54 

 Trihybrid ratio, 350-51 

 Trilophodon, 147-50 

 Triploid mutations, 491 

 Trisomic mutations, 491 

 Tschermak, 40, 43, 339, 352 

 Turner, Sir W., 98 

 Tuttle, E., 580 



Twins: evidences from, in support of 

 classification, 106; and the funda- 

 mental assumption of evolution, 62- 

 63; and the relative potency of hered- 

 ity and environment, 531-49 



Typhlopidae, 103 



Uniformitarianism, 22-23 



Unit characters, Mendelian, 345 



Urtica dodarti, 353-54; U. pilulifera 



353-54 

 Urschleim, 12, 16 



van Dyke, H., 540 



Vanessa io, 330-31 



Variation, 323-38; classification of, 324- 

 27; concept of, 324; continuous and 

 discontinuous, 327, 475; and develop- 

 ment, 327; and environment, 328; 

 germinal, 324; and heredity, 320-22; 

 nature of, 325, 326; polygons of, 431- 

 32; somatic, 324; statistical study of, 

 43"-35; universality of, 323-24 



Vasectomy, 576 



Vestigial structures, evidences from, 60, 

 77-100 



Virchow, R., 162, 240 



Voelkor, P. F., 542 



Volta Bureau, 571 



Wagner, M., 278-79 

 Walcott, C. W, 133-34, 140 



Wallace, A. R., 17, 26-27, 36, 106, 168- 



71, 181-84, 248 

 Walter, H. E., 416, 570-80 

 Watson, J. B., 541 



Weismann, A., 3, 7, 30-32, 256, 267, 269, 



272-77, 290,387,456-57, 511 

 Weismannism, 7 

 Weldon, W. F. R., 265-66 



Whales, comparative anatomy of, 68- 



70; embryology of, 128-29 

 White, G., 215, 221-22 

 White, T. H., 336 

 Whitman, C. O., 35 

 Whitney, D. D., 461 

 Whymper, E., 576 

 Wiggam, A. E., 540-56 

 Wilberforce, Bishop, 28-29 

 Wilder, H. H., 534-35 

 Williston, S. W., 35, 154, 156 



Wilson, E. B., 6, 44, 299, 300, 360, 399- 

 400, 404 



Wings, comparative anatomy of, 71 



Wistar Institute, 512 



Woltereck, R., 331-32, 461 



Woods, F. A., 524-30, 543 



Woodard, 159, 163 



Woolner, 92 



Wordsworth, W., 591 



Wright, Sewall, 113-14, 512 



Wyman, Professor, 87 



X-chromosome, 398-404, variations of, 



400; linkage with autosome, 400 

 Xonephanes, 12 



Y-chromosome, 398-404 



Yellow mice, lethal factors in, 427 



Zea mays, 354 



Zeleny, 498, 510 



Ziegler, E., 452 



Zoea larva of Peneus, 119 



Zygote, 114, 311, 394-95 



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