59-i 



Index 



Spencer, H., on the transmission of ac- 

 qxiired characters, 139 



— on Weismann, 33, 140 



— 3, 14, 305, 461, 467, 482, 497 

 Sphingidae, Tariation 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 doable, 543-546 



Stellaria media, 421 



Stephen, L., 461 



Sterility in hybrids, 97-99 



Sterne, C, 7^ 



Stockard, his experiments on fish embryos, 



255 

 SiKASBUKaEB, 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, R. J., 578 

 Stuart, A., 369 

 Sturdee, F. C. D., 370 

 Siitterlin, L., 516i 

 Sully, 123 

 Sutton, A. W., 991 

 Sutton, W. S., 1091 

 Svalof, agricultural station of, 80-83 

 Swamson, W., 320, 324 

 Synapta, calcareous bodies in skin of, 



29-32 

 S. lappa, 30 

 Syi-phus, 57 



Tarde, G., 476 



Teleology and adaptation, 272-274 

 Tennaut, F. R., 480^ 

 Teratology, 66 

 Tetraprothomo, 132, 136 

 Thiselton-Dyeb, Sir William, on Geo- 

 graphical distribution of Plants, 298-318 



— on Burchell, 274' 



— on protective resemblance, 276^ 



— 275 



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

 3-17 



— 140 



— and P. Geddes, 473 



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

 Theology, Darwin and, 477 

 Tiedemann, F., 319 



Tooke, Home, 516 



Totemism, 160-169 



Treschow, 449 



Treviranus, 8, 12, 13, 319, 320 



TrifoUum pratense quinquefolium, 244 



Trigonias, 193 



Trilobites, phylogeny of, 199 



Tschermack, 242, 418* 



Turgot, 532 



Turner, Sir W., 140 



T^vins, artificial production of, 254, 255 



Tylor, 467, 497, 498, 502 



Tyndall, W., 482 



Tyrrell, G., 482i 



Uhlenhuth, on blood reactions, 129 

 Underbill, E., SlQi 



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

 118, 139 



Vanessa, 48 

 V. antiope, 264 

 V. levana, 23, 24, 258 

 V. polychloros, 62 

 V. urticae, 50, 62 

 Van 't Hoff, 256 

 Varanus Salvator, 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 the life-history of an or- 

 ganism, 179-182 



— minute, 21-25 



— mutability and, 179-182 



— in relation to species, C9, 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 

 Vierkaudt, 506* 

 Vilmorin, L. de, 245 



Virchow, his opposition to Darwin, 145, 

 146 



