Kallima paralecta, leaf-butter-
fly, 86
KANT, quoted, 476
Katabolism, a disruption or ex-
plosive process, 32
Kea, of New Zealand, 446
Keimplasma. See Germ-plasm
Kentish plover, 83, 217
Kepler, Dr. Huggins's dog, 396
Kerguelen Island, wingless in-
sects of, 81
Kinesis, 467
Kingfishers, 446
KIRBY and SPENCE, localization
of smell in insects, 258; on
hearing in a moth, 267; on
instinct of ichneumon fly, 430
Kittens, instinctive antipathy to
dog, 396
KLEIN, Mr. S., on Bombyx quer-
cus, 258
KUHNE, Messrs. BOLL and, on
retinal purple, 276
Labyrinthodont amphibia, pineal
eye in, 288
LAMONT, on reindeer, 392
LANE, Dr. Arbuthnot, on in-
fluence of certain trades on
structure, 169
LANGLEY, Prof., on ætherial vi-
brations, 299
Language, 322; the instrument
of analysis, 349; its origin
and effects, 374
LANKESTER, Prof. E. Ray, his
description of perigenesis, 159;
on blind cave-fish, 194
Lapsing of intelligence, 435
LARDEN, W., on the Rhea, 89;
on instinct in a snakelet, 424
Larmarckian school, 209
Larvæ, dimorphism in, 187
Latency, phenomena of, 227
Lateral line of fishes, 252
Leaf-butterfly, 86
LEE, Mr. Arthur, on communi-
cation in cat, 345
Life-area, expansion and con- | Mathematical faculty and natural
traction of, 114
selection, 484
Limits of vision, 281; of sensa- MAUPAS, M., observations on
tion, 299
infusoria, 39
MAYER, on mosquito, 267
LINCECUM, Dr., on habits of McCook, Dr., sense of smell in
Texan ants, 425
Linnet, song of, 454
Lion, observation on, 400
Liver-fluke, life-history of, 47
Local signs, 308
Localization, 307; in animals,
338; in medusa, 359
LOCKE, on difference between
man and brute, 349
Logos makes man human, 375
LONBIERE, on instincts of Siam-
ese ants, 449
LOTZE, quoted, 379
LUBBOCK, Sir J., "Senses of
Animals," 246; sense of smell
in ants, 258; auditory organ
of ant, 267; on Hicks's organ,
267; on colour-sense in dog,
283; in insects, 291; in Daph-
nia, 292; on limits of colour-
vision, 296; on antennary
structures in hymenoptera,
297; on power of communica-
tion in dog, 345; in ants, 358;
on colour preferences in bees,
407; on instinct of play and
sympathy in ants, 414; on
homing faculty in bees, 428;
on sitaris, 439
Lucanus cervus, 180
Ludicrous, sense of, in dog,
LUMSDEN, Sir Harry, on part-
ridges, 398
LYELL, the necessary precursor
of Darwin, 121
MACH, Prof., on Macuta acustica,
Machetes pugnar, 110, 178
MACKENNAL, Mr. Alexander, ob-
servation on a cat, 405
MACLAGAN, Miss Nellie, on sym-
pathetic action in dog, 398
Madeira, wingless insects of, 81
Male.
See Sex-differentiation
Male and female insects, differ-
ences between, 179; greater
variability in, 237; vigour and
vitality of, in secondary sexual
characters, 237
MALLE, Dureau de la, on star-
ling, 455
Mammals, respiration in, 21;
early nutrition of, the result
of parental sacrifice, 57; con-
vergence in, 117; sense of smell
in, 255; hearing in, 263; sight
in, 283; perceptions of, 338
Man, elimination by physical
circumstances, 81; alternation
of good and bad times, 117;
reversion in, 229
LEROY, on abstract notion of MANN, Mrs., on sympathetic
danger in fox, 348
Leucocytes, rôle of, 439
LEWES, G. H., 437, 462
LEYDIG, on antennule of cray-
fish, 259
Life, duration of, due to natural
selection, 186
action of dog, 397; anecdotes
of dogs, 406
Mantis, protective and aggres-
sive resemblance in, 90
Marsupials of Australia, 117
MARTINEAU, Dr., on wants, 382
Materialism, 464, 471
ants, 258; habits of Texan
ants, 425
McCosн, Dr., quoted, 391
Means and ends, 371
Medusa, 46; sense of hearing in,
265; eyes of, 293; localization
by, 359
Melanerpeton, 288
MELDOLA, Prof. R., 239
Memory, the revival of past
impressions, 304; organic,
Butler and Hering on, 62
Mental evolution, 464
MERCIER, Dr. Charles, on the
criteria of intelligence, 456
MERRIFIELD, Mr., experiments
on moths, 238
Metabolism, 32
Metakinesis, 467
Metamorphosis and transforma-
tion, 7
Metaphyta, 15
Metazoa, 15
Methona, 87
MIALL, Prof., Fig. of touch-hair
of an insect, 248
Mice, white and grey, crossed,
375; on language and thought, | Oyster-embryo set free early, 56;
NAISH, Mr. John G., on the
cockatoo, 354
Natural selection, variation and,
61; two modes, elimination
and selection proper, 79; and
the effects of use and disuse,
174; not to be used as a magic
formula, 184; and instinct,
445; and human thought, 484
Nerves, briefly described, 246;
afferent and efferent, 303
Nestor notabilis, 446
Nests of bower-bird and hum-
ming-bird, 408; instinctive
building of, 453
NETTLESHIP, Mr., on a lion, 400
Neural processes, environment
of, 491
Neurosis and psychosis, 465
Neuter insects, 440
New Zealand sparrow, 445;
parrot, 446; chaflinch, 454
NICHOLS, on taste, 251
Noctule, 66
NOIRE, on concepts, 325
Nomada solidaginis, 90
NORRIS, Mr. W. E., quoted, 420
Noumena, or "things in them-
selves," 470
Nucleus of animal cell, 10; as
controlling formative process
in, 124
Nutrition in illustration of the
process of life, 25
Object, nature of, 313, 437
Ocelli in insects, 288
Decodoma cephalotes, 213
Onchidium, 293
Optogram, 276
Organic combination, hypothesis,
of, 150, 240
Organic evolution, 177; as basis
of comparative psychology,
Organic growth, 5
Organism, unity of, as regards
body and germ, 161; relation
of, to environment, 183
Organization,
co-ordinating
power of, 125; of bodily and
mental activities, 419
Origin, distinguished from guid-
ance, 242
Origin of species, 242
Origin of organic variations, 231;
of metakinetic or mental varia-
tions, 496
Ornithoptera, 179
Otoliths, 265, 271
OWEN, Sir Richard, suggested
germinal continuity, 135
variation of Mediterranean, 164
Pachyrhyncus orbifex, 87
Pagurus prideauxii, 457
Pain, massive and acute, 379;
capacities of animals for, 391
Pangenesis, 182
Panmixia and disuse, 189
Papilionida, 202
Paradise, birds of, 202
Paranucleus in protozoa, 39
Paramacium, reproduction in, 39
Parasites, how they feed, 5
Parental sacrifice in birds and
mammals, 57; its limits, 186
Parrot, intelligence of, 353
Parthenogenetic forms,
second polar cell in, 153; the
drone an exception, 153
Parus palustris, 164
PEAL, Mr. S., on use of tools by
elephant, 370
PECKHAM, Mr. G. W., on love-
antics of a spider, 208, 450
Pecten, 293
Pelagic animals, colours of, 83
PENZOLDT, Dr., on smell, 254
Percept, 325, 326
Perception, 311, 324; in animals,
Perceptual association, 202
Perigenesis of the plastidule, 159
Peripatus, 142
Persistence, law of, 61
Pheasant, hybrids between Am-
herst and golden, 106; golden,
hen with cock's plumage, 228
Phengodini, 223
Phenomenal nature of object,
Photographic psychology, 320,
Phrynocephalus mystaceus, 90
Physiological isolation, 104
Physiological and psychological
activities, 304; series, 386, 417
PICTON, Mrs. E., on Skye terrier,
Pigeons, correlated variations in,
216; silky fantail prepotent,
Pigs, intestines of, 171; cross-
ing of, 226, 230
Pike, teeth of, 437
Pineal gland, 196, 288
Pipistrelle, wing of, 64
Pipits as illustrating divergence,
Pitch, musical, 261
Plasm, 10
Plasmogen, 10
Platyglossus, 83
Play, instinct of, 450
Pleasure and the special senses,
243; massive and acute, 379;
capacities of animals for, 391
Plecotus auritus, 68
Plesiosaurus, pineal eye of, 288
PLOSS, Herr, on sex-differentia-
tion in man, 59
Plover, Kentish, 83, 217
Polar cells, extrusion of, 51; and
variation, 153
Postponement of action, 385
POULTON, Mr. E. B., on colours
of animals, 84; on Phrynoce-
phalus mystaceus, 90;
caterpillars and chrysalids,
165; dimorphism in larvæ,
187; observations on edibility
of caterpillars, 212; Theories
of Heredity," qutotation from,
214; on the eating of un-
palatable insects, 445
Predominant defined, 349; and
language, 374
Preferential mating, a means of
segregation, 102; and sexual
selection, 197
Preformation and evolution of
older writers, 50
Prepotency, 227
Presentations of sense, 318
Previous sire, effect of, 168
Prevision as a criterion of intel-
ligence, 457
Principles, mechanical, 368
Process of life, 20
Progress, or continuous adapta-
tion, 119; adaptation to more
complex circumstances, 183
Pronghorn, curiosity in, 339
Proposition, 329
Protective resemblance and
mimicry, 82; general resem-
blance, 83; variable resem-
blance, 84; special resem-
blance, 86; to another
organism, 87; coloration, a
means of segregation, 101
Protection, fosterage and, 219
Proteus, sensitive to light, 294
Protista, 15
Protohippus, 118
Protophyta, 15
Protoplasm, 10
Protozoa, nature of, 15; trans-
mission of acquired faculty in,
147; origin of metazoan varia-
tions in, 156; psychology of,
Psithyrus rupestris, 90
Psychological and physiological
activities, 304; series, 386, 417
Psychoses and neuroses, 465
Ptarmigan, on colour of, 165
Rabbit, brain of, 171; Angora
crossed, 225; one-eared, 226;
deprived of long lip-bairs, 247;
papilla foliata of, 250; effects
of superabundant food on, 394
RAE, Dr., on dogs swimming
rivers, 364; on **abstract
reasoning" in the fox, 366; on
wild and tame ducklings, 435
Rage and anger, 389
RAMSAY, Dr. Wm., on smell, 255
Rats of Solomon Islands, 100;
of the London Docks, 106; at
South Kensington, 115
RAYLEIGH, Lord, on colour-blend-
ing, 283; on sensitive-flame
experiments, 298;
Reality, meaning of term, 314
Reason distinguished from intel-
ligence, 330, 365; as defined
by Mr. Romanes, 372
Recepts, 326, 368
Recognition-marks, 103; învolve
perception, 351
Reconstructs and reconstruction
(mental), 318
Reflex action, 415; and instinct,
Regeneration of lost parts, 41;
in relation to heredity, 124;
law of growth concerned in,
Reindeer wounded, 392; change
of habit in, 445
Remnants or vestiges, 196
Reproduction, nature of, 13;
and development, 36; in the
protozoa, 38; in the metazoa,
41; by budding, 42; sexual,
42; peculiar modifications of,
45; developmental, 143
Reproductive cells, continuity
aggressive, 90
Respiration an essential life-
process, 3; in illustration of
the process of life, 21
Retardation and acceleration, 221
Retina of inan, 274; of birds, 284
Retinal purple, 276
Revenge, 401
Reversion, 191
Revolution and evolution, 119
Rhea, neck resembling snake, 88
Rhinolophus ferri-equinum,
hipposideros, 65
Rhyme-association in parrot, 356
RIBOT, M., on attention, 343
RICHARDSON, Mr. Charles, on
railway servants killed by
train, 388
RILEY, Prof., on Phengodini, 223
ROMANES, Prof. G. J., on physio-
logical isolation, 104; on the
cessation of selection, 190; on
the failure of heredity, 192;
on the reversal of selection,
193; on sense of smell in dog,
on colour-sense in chimpanzee,
283; on ideas, 326; on dog
cowed by noise, 340; on ab-
stract ideas in animals, 348;
on parrot, 353; on localization
and discrimination, 359; ex-
amples of animal intelligence
considered, 362; on abstract
ideas in the capuchin, 368;
definition of reason, 372; on
strange attachments in birds.
396; on some emotions in
animals, 400; on endurance of
pain in dogs and wolves, 402:
on sense of humour in dog,
407; on indefinite morality in
animals, 413; definition of
instinct, 422; on education of
ant, 428; on homing faculty
of bees, 428; on consciousness
and instinct, 432; summary
of his conclusions on instinct,
434; on instincts of Siamese
ants, 449; his psychological
scale, 478; on the world as an
eject, 479
Rotation, sense of, 269
Rotifers, absence of fertilization
in reproduction, 45
RUSSELL, Mr. W. J., on smell | SOLLAS, Dr. W. J., on regenera-
in the dog, 255
Saitis pulex, 450
Salinity of water, effects of, on
brine-shrimp, 161
Salmon, new variety of, in Tas-
mania, 99
Saturnia, modification of, by
changed food, 163; carpini
(emperor moth), 258
Savages, fetishistic belief in, 494
SCHAUB, Mr., observations on a
terrier, 405
SCHMANKEWITSCH on Artemia,
SCLATER, Mr. W. L., on mimicry
in an insect, 88
SEDGWICK, Mr. Adam, on de-
velopment of peripatus, 142
SEEBOHM, Mr. H., on birds' eggs,
Selection, as compared with eli-
mination, 79; illustrated, 92;
artificial, 172; cessation of,
190; reversal of, 193; sexual,
or preferential mating, 197,
452; as a factor in the origin of
instinct, 447; as applied to the
intellectual faculties, 498
Selenia, illunaria, and illus-
traria, 238
Self, the, or ego, 475
Self-consciousness, 460
Semicircular canals, 262, 269
Senility, introduction of, 184
Sensation defined, 305, 324
Sense-feelings of animals, 393
Senses of animals, 243; organic
and muscular, 244; touch, 245;
temperature-sense, 249; taste,
250; smell, 253; hearing, 261;
sight, 272; contact and telcos-
thetic, 249; problematical, 297
Sensibility, 385; variations of,
SHIPP, Captain, experiment on
an elephant, 401
Sight, sense of, 272
Sitaris, instinct of, 438
SKERTCHLEY, Mr. S. B. J., on
leaf-butterfly, 86
Slave-making ants, 425
Smell, sense of, 253
Smerinthus ocellatus, 165
SMITH, Mr. G. Munro, on elimi-
nation among microbes, 80
Rocx, on extirpation of cleavage-Snail, variations in banding of
cell of frog's egg, 214
ROWELL, G. A., on "Beneficent
Distribution of Pain," 392
Ruffs, variability of males, 110,
shells, 75; sense of smell in,
260; auditory sac, 265; eye of,
292; spicule amoris of, 450
Snakes, mimicry in, 88
Snipe, drumming of, 448
tion of tentacle in snail, 127
Somatic, or body-cells, 193
SOMMERING, Fig. of semicircular
canals, 270
SPALANZANI, his experiments on
bats, 248
SPALDING, Douglas, on instinc-
tive emotions, 395; on perfect
instincts of chicken, 424; on
deferred instinct in swallow,
Sparrows in New Zealand, 445
Specific characters, utility of,
110; constancy of, 111
SPENCER, Mr. Baldwin, Fig. of
pineal eye, 288
SPENCER, Mr. Herbert, law asso-
ciated with his name, 37; phy-
siological units, 125, 153; on
lap-dogs, 195; on the Irish elk
and giraffe, 212; on diminution
in ear-muscles, 215; definition
of pleasure and pain. 381; on
æsthetics, 412; on instinct and
reflex action, 422
Sperm-cell and egg-cell, 13; con-
ditions which determine pro-
duction of, 60
Sphex, instinct of, 429, 456
Spiders, hunting, mimicry in, 89;
Javan, Mr. H. O. Forbes on,
90; love-antics of, 208, 450;
ocelli of, 289
SPINOZA, quoted, 61, 379, 460
Sponges, reproduction of, 41, 42
Spongilla, reproduction of, 46
Spore-formation, reproduction by,
Squirrel of Sarepta, 113
Stag-beetles, variation in males
of, 180
Star-fish, embryo set free early, 56
Starling, modified song of, 455
ST. JOHN, observations on a re-
triever, 400
Stenorhynchus, 457
Sterility, how developed, 108
STEWART, Mr. Duncan, on sym-
pathy in cat, 398
Stimuli, 302
STRANGE, Mr., on love-antics of
satin bower-bird, 450
Striped ancestor of Equidæ, 230
Struggle for existence, 79; varia-
tlons in the intensity of, 112
STURGE, Miss Mildred, on the
parrot, 355
Stylonichia, observations of M.
Maupas on, 39
SULLY, Mr. James, on concepts,
325; on propositions, 329; on
judgment and reason, 330; on
emotion, 390; on æsthetic sense
of beauty, 411
SUTTON, Mr. Bland, on hen phea-
sant like the male, 228; on the
action of leucocytes, 439
Swallow and swift, convergence
in, 117; cliff, of United States,
SWAYNE, Mr. S. H., on the ele-
phant, 369
Symbolic nature of mental pro-
ducts, 314
SYMONDS, Mr. J. A., on "world-
consciousness, 478
Sympathy in animals, 397
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
volves perception, 351
WARREN, Mr. Robert Hall, a
dog anecdote, 344
Wasp, use of antennæ, 291
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
WEBER, on musical discrimina-
tion, 309; on muscular sensa-
tion in eye, 310
area, 113; effect of good times | Warning-coloration, 82; in-
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 definite 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 of, 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 bombylans, 90
Voluntary and involuntary ac-
tivities, 416
Vorticella, 38
WEIR, Mr. Jenner, on nest-
building in birds, 453
WEISMANN, Dr., on continuity
of germ-plasm, 138; on cis-
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,
189; on the effects of pan-
mixia, 190; on acceleration,
222; his views applied to
instinct, 438; the intellectual
faculties, 497
WESTLAKE, 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
WAFLCHLI, 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, 102; on
papilionida of Celebes; 165;
on the dull colours of hen
birds, 199; on origin of
secondary sexual characters, Xiphocera, 179
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,
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
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