454 
Silky fowl, 132. 
Silvestri, 410, 411. 
Simocephalus, 342-345, 383, 384. 
Siredon, 315. 
Skin, 12. 
Snails, 139-141, 160, 165. 
Solenobia, 374. 
Spathegaster, 270, 271. 
Spencer, H., $1, §2, 62, 24%, 245. 
Spermatozo6n, 178-183, 417. 
Spherechinus, 175, 176, 179, 180. 
Spirographis, 265. 
Sponge, 258, 368.. 
Stag, 432. 
Standfuss, 16, 21, 22, 23, 24, 44, 166, 226- 
227. 
Staples-Browne, 136. 
Starratt, 13, 14. 
Stenorynchus, 438. 
Stereotropism, 266. 
Stevens, 266, 326, 335, 401, 403, 406, 416. 
Stieda, 392. 
Stimulants, 256-257. 
Strasburger, 178, 414. 
Strongylocentrotus, 175, 176, 180. 
Struthers, 118. 
Sutton, gor. 
Tadpole, 251, 255, 257, 258, 260, 263, 
287, 298, 301. 
Tanager, 430. 
Tanner, 356. 
Tatusa, 412. 
Tegetmeier, 440. 
Telea, 301. 
Telegony, 59. 
Tenebrio, 403. 
Tenthredinide, 357. 
Tephrosia, 153-154. 
Tetraneura, 331. 
Thomson, 367, 387-388. 
Thorndike, 412-413. 
Thury, 393. 
Tiger, 157. 
Toad, 248. 
Toe, 124. 
Torelle, 18x. 
Tornier, 304. 
Tortoiseshell cats, 113-115. 
Tosa fowl, 130-132. 
Toyama, 149-151. 
Transvaal, 38. 
Treat, 376. 
Trematodes, 374. 
Lndex 
Trembley, 285, 288, 290. 
Trichine, 268. 
Trigonaspes, 269. 
Triton, 174, 299. 
Trout, 263. 
Tschermak, 67. 
Tubularia, 259, 268, 288. 
Tumbler pigeons, 135. 
Turnspit dog, 209. 
Tutt, 153-154. 
Twins, 411-413. 
Uniform coat rabbits, 109. 
Vanessa, 313, 376. 
Vanessa antiopa, 17, 18. 
Vanessa atalanta, 17. 
Vanessa cardui, 16. 
Vanessa io, 37. 
Vanessa levana-prorsa, 16, 24. 
Vanessa polychloros, 39. 
Vanessa urtice, 34, 358. 
Variation, fluctuating, 198-203. 
Vernon, 174, 264. 
Verworn, 62. 
de Vries, 45, 46, 47, 62, 64, 112, 159, 160, 
167, 170, 209, 214, 217-221, 404. 
Wallace, 430, 443, 444, 446. 
Warren, 207, 345. 
Watasé, 426. 
Weber, 410. 
Weismann, 51, 52, 55, 59, 62, 188, 248, 
250, 281, 315, 337-341, 350, 384, 404, 
415. 
Weldon, 204-205. 
Westphal, 54. 
Wetzel, 300. 
Wheeler, 235, 408. 
Wiesner, 62. 
Wilson, E. B., 401, 402, 403, 406. 
Woodruff, 321. 
Wyandotte fowls, rar. 
Xenia, 61. 
Yung, 255, 258, 262, 263, 264, 265, 381, 
382. 
Zaky, 257. 
Zebra, 158. 
Zeleny, 282. 
Ziegler, 418-419 
