512 



Index. 



Tameness, instinctive, 435 



Tannek, Miss Agnes, on a thrush, 

 .398 



Tasmanian salmon, 99 



Taste, standard of, 95, 205 ; sense 

 of, 250 



Teeth of pike, 437 



Temperature-sense, 249 



Terror, 387 



Thaumalia picta and amherstice, 

 106 



Thekla, instinct of. 430 



" Things in themselves," or nou- 

 mena, 470 



Thomas, Mr. Oldfield, on rats of 

 Solomon Islands, 100 



Thomson, Mr. J. A., Prof. Patrick 

 Geddes, and, on anabolism and 

 katabolism, 44 ; quoted, 50, 137, 

 237 ; his " History and Theory 

 of Heredity," 35 



Thought, 482 



Thrush, hearing in, 264; sym- 

 pathy in, 398 



Thunberg on young hippopo- 

 tamus, 423 



Tissues of the body, 20 



TooKE, Mr. Hammond, on egg- 

 eating snake. 88 



Tools, use of, by animals, 370 



Touch, sense of, 245 



Transformation and metamor- 

 phosis, 7 



Transparency of some marine 

 organisms, 83 



Treat, :Mrs., her experiments on 

 caterpillars, 59 



Tricks, 355 



Trionyx, 181 



Trochus, 292 



Tuco-tuco, 194 



Turner, Sir Wm., on New 

 Guinea nativet>, 169 



Turkey, instinctive emotion in 

 the, 395 



Twins, Mr. Galton's investiga- 

 tions on. 169 



Tylor, Alfred, on coloration in 

 animals and plants, 201 



Udders, enlarged, of cows, 215 

 Ultra-violet rays, 296 

 Unicellular organism. See Pro- 

 tozoa 

 Unity of organism, 161, 234 

 Use and disuse. 146. 209 

 Utility of specific characters, 110 



Vanessa urticae, 165 



Varanus benegalensis, 288 

 Variation, correlated, 59 ; and 

 natural selection, 61 ; tabu- 

 lated by A. R. Wallace, 63 ; in 

 wing-bones of bats. 63 ; advan- 

 tageous, neutral, and disadvan- 

 tageous, 95; in climatal and 

 geographical conditions, 112; 

 secular, in climate and life 



area, 113 ; effect of good times 

 and hard times on, 114 ; here- 

 dity and the origin of, 122 ; 

 a source of, in use and disuse, 

 146 ; sexual union, a mode of 

 origin of. 149 ; in detinite direc- 

 tions, 151 ; produced by ex- 

 trusion of second polar cell, 

 153 ; protozoan origin of, 156 ; 

 due to the action of environ- 

 ment, 163; to the effects of 

 use and disuse, 168 ; to do- 

 mestication, 171; in male 

 stag-beetles, 180 ; in mating 

 preferences, 205 ; co-ordinated 

 in Irish " elk " and giraffe, 

 212; nature of, 216; in amount 

 of developmental capital, 221 ; 

 inheritance of, 223 ; origin of, 

 231; limitations of, 232; for- 

 tuitous, in bat's wing, 235 ; 

 definite direction of, 238 ; in 

 limits of colour-vision, 281 ; in 

 habits and instincts, 445, 456 ; 

 in mental evolution. 496 



Vertebrata, diagrammatic ac- 

 count of development ot, 51 



Verworn, Dr., on protozoa, 440 



Vespertilio mystacinus, 70 



Vesperugo leisleri, 65 



Vesperugo noctula. 67 



Vesperugo pipistrellus, 69 



Vigour and vitality, application 

 of, in male, 237 ; in female, 238 



Vindictiveness, 401 



Vision, 272 ; mosaic, 291 



Volition, 459 



Volucella hombylans, 90 



Voluntary and involuntary ac- 

 tivities, 416 



Vorticella, 38 



Waelchli, Dr., on colour-glo- 

 bules in birds, 284 



Wallace. Mr. A. R , tabula- 

 tions of variations. 63; on 

 tortoiseshell butterfly of Isle 

 of Man, 81 ; on protective 

 colours in fishes, 83 ; on diver- 

 gence among birds, 97 ; on 

 recognition-marks, 1 02 ; on 

 papilionidae of Celebes ; 165 ; 

 on the dull colours of hen 

 birds, 199 ; on origin of 

 secondary sexual characters, 

 200 ; and A. Tylor on physio- 

 logical guidance, 201 ; on pre- 

 ferential mating, 203 ; on 

 reversion in grouse, 229 ; on 

 migration in birds, 428 ; on 

 nest-building in birds, 453 ; 

 on the song of birds, 455 ; on 

 materialism. 464 ; on mathe- 

 matical and artistic faculties, 

 484, 497 



Walker, R., on reversion in 

 bull, 229 



Ward, Mr. J. Clifton, on dog, 

 345 



Warning-coloration, 82 ; in- 

 volves perception, 351 



Warren, Mr. Robert Hall, a 

 dog anecdote, 344 



Wasp, use of antennas, 29 1 



Waste and repair essential life- 

 processes, 8 



Water, changes of salinity in, 

 164 



Water-ouzel, 446 



Waterton, Charles, 256 



Watson, *' Reasoning Power of 

 Animals," 369 



Webb, Dr., his operation on an 

 elephant, 369 



Webeu, on musical discrimina- 

 tion, 309 ; on muscular sensa- 

 tion in eye, 310 



Weir, Mr. Jenner, on nest- 

 building in birds, 453 



Weismann, Dr., on continuity 

 of germ-plasm, 138 ; on dis- 

 tinctness of germ-plasm from 

 body-plasm, 140 ; on meaning 

 of second polar cell. 153 ; on 

 protozoan origin of variations, 

 156; on the introduction of 

 senility and death, 184; on 

 the distinction of birds' eggs, 

 1«9 ; on the effects of pan- 

 mixia, 190; on acceleration, 

 222 ; his views applied to 

 instinct, 438 ; the intellectual 

 faculties, 497 



Westlakk. Miss Mabel, on the 

 parrot, 353 



Whiskered bat, 70 



White, in arctic forms, 165 ; Mr. 

 Poulton on production of. 202 ; 

 in grouse, instance of rever- 

 sion, 229 



Wildness of birds, instinctive, 

 435 



Will, F., on taste in bees, 253 



Wilson, Sir Charles W., on 

 wounded camels, 392 



Wilson, Edward, measurements 

 of bats, 63 



Wing-bones of bats, measure- 

 ment of, in illustration of 

 variation, 63 



Words, " understanding " of, by 

 animals, 347 



Wrasse, keeness of vision of, 287 



Xiphocera, 179 



YouATT " On Sheep," 455 

 Young, Thomas, his colour- 

 vision theory, 277 

 Yung, his experiments on tad- 

 poles, 59 



Zebra, inconspicuousness of, in 



dusk, 84 

 Zuyder Zee, new variety of 



herrings in, 99 



PRINTED by WILLIAM CLOWES AND SONS, LIMITED, 

 STAMFORD STREET AND CHARING CROSS. 



