INDEX 



Abstract ideas, 322, 363 



Acceleration, sense of, 269 



Acceleration and retardation, 221 



Achirus pellucidus, 83 



Acquired characters, are they 

 transmitted ? 147 ; habits, are 

 they inherited ? 436 ; variations 

 in the intellectual sphere, 497 



Acrcea, 203 



Activities, organic basis of com- 

 parative psychology, 337 ; of 

 animals, 415; voluntary and 

 involuntary, classification of, 

 462 



Adaptation, analogous, 117 ; 

 modes of, 119; special, ex- 

 amples of, 179; to varying 

 environment, 183 



Advantage must be particular, 

 184; must be immediate and 

 not prospective, 186 ; must be 

 "available," 188, 211 



jEschna, 289 



./Esthetic preferences in insects 

 and birds, 207 ; aspect of sen- 

 sation, not primary, 243 ; 

 motive not present to animal 

 consciousness, 409 



Alexander, Mr. S., " Moral 

 Order and Progress," 463 



Allen, Mr. Grant, on evolution 

 of flowers, 206 ; on pleasure 

 and pain, 380 



, Mr. J. A., on colour and 



humidity, 164 



Alternation of generations, 46 



Amblyopsis spelceus, 271 



American school of evolu- 

 tionists, 221 



Amceha, how it feeds, 5 ; repro- 

 duction of, 12, 38 ; diagram of, 

 12; protoplasmic functions of, 

 142 



Amphibia, labyrinthodont, 288 



Anabolism, constructive process, 

 32 



Analysis (mental), 321 



Ancon sheep, 226 



Andhrson, Mr., on one-eared 

 rabbits, 226 



Anemone, sea, reproduction of, 

 41 ; marginal beads of, 298 ; 

 discrimination by, 359 



Anger and rage, 389 



Animal life, nature of, 1 ; di- 

 versity of, 177 



Animal intelligence, differs 

 g nerically from man's reason, 

 350 



Animals, characteristics of, 1 ; 

 divided into protozoa and 

 metazoa, 15 ; and plants, their 

 relation to food-stuffs, the 

 atmosphere, and energy, 15 ; 

 intelligent not rational, 373 ; 

 capacities for pleasure and 

 pain, 391 



Animistic ideas of savages, how 

 developed, 494 



Anisognathus, 226 



Anomia, 265 



Ant, sauba, of South America, 

 213; sense of taste in, 253; 

 sense of smell in, 258 ; audi- 

 tory organ of, 267 ; intelli- 

 gence of, 357 ; activities often 

 described as instinctive, 425 ; 

 neuter insects, 440 ; Siamese, 

 449 



Antagonism, advantages of, 394 



Anten n ae of insects, modifications 

 of, 178 ; of emperor moth, 199 ; 

 organ of hearing in, 267 ; modi- 

 fied hairs of, 297 



Autennule of crayfish, 259 



Anthophora, 438 



Anticipation, 327 



Antlers of deer in illustration of 

 growth, 28 



Aphides, absence of fertilization 

 in reproduction, 44 



Appetence and aversion, 343,384 



Apus, 46 



Aquatic organisms, respiration 

 in, 4 ; sense of smell in, 256 



Arago, M., observation on 

 turnspit dog, 404 



Arctic hare and fox, 84 ; animals, 

 colours of, 165 ; fox, cunning 

 of, 366 



Argyle, Duke of, on humming- 

 birds, 110 



Arternia salina and milhausenii, 

 164 



Artistic faculties and natural 

 selection, 484 ; products, evo- 

 lution of, 4S9 



Association a tendency to inte- 

 gration, 183; perceptual and 

 mimicry, 202; and recognition 

 marks, 203 



Ateles, 210 



Atmosphere, relations of animals 

 and plants to, 15 



Attacus, 179 



Attention, 342 



Attidim, 208 



Auditory apparatus in man, 262 



Aurelia, life-cycle of, 45 

 Australian mammals and others 



convergent, 117 

 Automatic action, 415 

 Available advantage, 188, 211 

 Aversion and appetence, 343, 



384 



Baboon, experiments with, 352 



Bacilli attacked by leucocyles, 

 439 



Bacillus violaceus, 80 



Bailey, Mr. E. H. S., on taste, 

 251 



Balbiani on Chironomus, 137 



Batistes. 179 



Barkett, Mr. W. F., on sensi- 

 tive-flame experiment, 298 



Barrier, geographical, 99 ; time, 

 in physiological isolation, 105 



Bareington, The Hon. Dailies, 

 on song of linnet, 454 



Bateson, Mr. W., on lateral 

 line, 252 ; on fishes hunting 

 by scent, 256 ; on smell in 

 shrimps, etc., 260 ; on hearing 

 in fishes, 264 ; on hearing in 

 Anomia, 265 ; on sight in 

 fishes, 286; on rockling and 

 sole, 352 ; on fascination in 

 fishes, 388 



Bats, tabulated measurements of 

 wing-bones of, 65-73 ; wings, 

 fortuitous variations in, 235 ; 

 experiment witli, 247 



Beauty, standard of, 206 ; sense 

 of, 407 



Beaver, change of habit in, 445 



Beccari on gardener bower bird, 

 408 



Becker, Alexander, on varia- 

 tions in the balance of life, 112 



Bees, divergent development of, 

 58 ; cuckoo, 90 ; latency in, 

 228 ; sense of taste, 253 ; sense 

 of smell, 257 ; smell-hollows, 

 259 ; eyes and eyelets of, 2S9 ; 

 intelligence of, 357 ; colour 

 preferences in, 408; homing 

 faculty in, 428 ; neuter insects, 



440 



Beetles of Madeira, 81 ; stag-, 

 variability of male, ISO ; ob- 

 servations on dung-, 36S 



Begging in dogs, 345 



Berkeley, Bishop, quoted. 475 



Beut, M. Paul, limits of sensi- 

 bility to light, 296 



