594 



Index 



Spencer, H., on the transmission of ac- 

 quired characters, 139 



— on Weismann, 33, 140 



— 3, 14, 305, 461, 467, 482, 497 

 Spbingidae, variation in, 28 

 Spinoza, 142, 453 



Sports, 69, 73, 181 



Sprengel, C. K., 4, 403-405, 409, 420 



Stability, principle of, 543-554 



Stahl, 397 



Standfuss, 62, 258 



Stars, evolution of double, 543-546 



Stellaria media, 421 



Stephen, L., 461 



Sterility in hybrids, 97-99 



Sterne, C, 7 1 



Stockard, his experiments on fish embryos, 



255 

 Stbasburgek, E., on The Minute Structure 



of Cells in relation to Heredity, 102-111 

 Strongylocentrotus franciscanus, 249 

 S. purpuratus, 249, 252, 254 

 Struggle for existence, 19, 20, 77, 78, 471- 



473 

 Strutt, B. J., 578 

 Stuart, A., 369 

 Sturdee, F. C. D., 370 

 Siitterlin, L., 516 1 

 Sully, 123 

 Sutton, A. W., 99 1 

 Sutton, W. S., 109 1 

 Svalof, agricultural station of, 80-83 

 Swainson, W., 320, 324 

 Synapta, calcareous bodies in skin of, 



29-32 

 S. lappa, 30 

 Syrphus, 57 



Tarde, G., 476 



Teleology and adaptation, 272-274 

 Tennant, F. E., 480 1 

 Teratology, 66 

 Tetraprothomo, 132, 136 

 Thiselton-Dyer, Sir William, on Geo- 

 graphical distribution of Plants, 298-318 



— on Burchell, 274 1 



— on protective resemblance, 276 2 



— 275 



Thomson, J. A., on Darwin's Predecessors, 

 3-17 



— 140 



— and P. Geddes, 473 



Tbomson, Sir J. J., 568, 571, 581, 582 

 Tbeology, Darwin and, 477 

 Tiedemann, F., 319 



Tooke, Home, 516 



Totemism, 160-169 



Treschow, 449 



Treviranus, 8, 12, 13, 319, 320 



Trifolium pratense quinquefolium, 244 



Trigonias, 193 



Trilobites, phylogeny of, 199 



Tschermack, 242, 418 2 



Turgot, 532 



Turner, Sir W., 140 



Twins, artificial production of, 254, 255 



Tylor, 467, 497, 498, 502 



Tyndall, W., 482 



Tyrrell, G., 482 1 



Ublenhuth, on blood reactions, 129 

 Underhill, E., 510 1 



Use and disuse, 22, 32-34, 37-42, 89, 90, 

 118, 139 



Vanessa, 48 

 V. antiope, 264 

 V. levana, 23, 24, 

 V. pohjchloros, 62 

 V. urticae, 50, 62 

 Van 't Hoff, 256 

 Varanus Salvator, 



258 



317 



Variability, Darwin's attention directed to, 

 19 



— W. Bateson on, 85-101 



— and cultivation, 245, 246 



— causes of, 74-77, 225, 448 



— polymorphic, 77-84 



Variation, continuous and discontinuous, 

 238, 239 



— Darwin's views as an evolutionist, and 

 as a systematist, on, 457 



— definite and indefinite, 224, 225 



— environment and, 224, 235-237 



— and heredity, 84-101, 242 



— as seen in tbe life-history of an or- 

 ganism, 179-182 



— minute, 21-25 



— mutability and, 179-182 



— in relation to species, 69, 94, 95 



— H. de Vries on, 66-84 

 Varigny, H. de, 7, 16 

 Varro, on language, 513 

 Veronica chamaedrys, 243, 245 

 Verworn, 130 



Vestiges of Creation, Darwin on The, 13 

 Vierkandt, 506 4 

 Vilmorin, L. de, 245 

 Virchow, his opposition to Darwin, 145, 

 146 



