Homing of bees, 131
Homoeopathic influence defined, 36
Honey-pot ant, 215

House-martin, nest-building of, 112
HUDSON, Mr. W. H., on fear in
birds, 49, 50, 110; on animal
gladness, 317
Hunting play, 254

HUXLEY, T. II., on reflex notion in
frog, 300; on consciousness ns
opiphenomenon, 306 ff.; on con-
sciousness as product of nervous
changes, 330

HYDE, Mr., on king crab, 298
Hydractinia, colonial polype, 206

I

Ideals, distinguish ethics, 278
Ideational stage of mental develop-
ment, 59

Imitation, 179 ff.; three stages of
in child, 192

Impulse in intelligent behaviour,

60; Prof. Thorudike's use of the
term, 186; connection of with
conative process, 235
Independence of automatic and
controlling centres, 43

Infant, congenital responses in, 54
Influence of intelligence on in-
stinct, 168

Inheritance of acquisitiveness, 40
Inunto capacity, 176; likes and
dislikes, 119

Insects, instinctive behaviour in,
71; intelligent behaviour in, 123
Instinct, broader and narrower view
of, 99; primary and secondary,
107, 109; influence of, intelligence
on, 168; priority of, to intelli-
gence, 173; disintegration of, 175
Instinctive behaviour defined, 63;

in insects, 71; in birds, 84; con-
scious aspect of, 98
Integration and differentiation of
nerve centres, 167
Intelligence lapsed, 107; influence

of, on instinct, 168; of ants, Lord
Avebury on, 218; biological im-
portance of, 310
Intelligent behaviour, 117; evolu-
tion of, 155

Intelligent process distinguished
from rational, 59, 138
Intercommunication, 193, 336
Interest, 243

Internal factors in instinctive be-
haviour, 102

Irritability, fundamental, property
of protoplasm, 240, 296

J

JAMES, Prof. Wm., theory of omo-
tions, 246, 292

Jays, bathing of, 89; mode of taking
food, 94

JENNER on cuckoo, 92
JENNINGS, Dr. H. S., on behaviour
of Paramecia, 5

K

KERNER, Dr., on sun-dew, 26; on
sensitive Oxalis, 27; on Valis-
neria, 29

King-crab, reflex action in, 298
KNIGHT, Andrew, on Norwegian
ponies, 109

KROPOTKINE, Prince, on mutual
aid among animals, 227

L

Lamarckian hypothesis, 169, 170,

177

Language, nature of, 195
LANKESTER, Prof. E. Ray, on small-
brained mammal, 168
Lapwing, instinctive behaviour of,

113

Law of battle, 313

Leech, observation on, 159
Leucopsis, instincts of, 79
LEWES, G. H., on lapsed intelli-
gence, 107

Limpets, observations on, 155
LINDLEY, Dr., on children, 141
Locality, studies by wasps, 128
LOCKE, John, limitations of animals,
166

M

MACKENZIE, Prof. J. S., on ethics,
278; on conscience, 281; on
ambiguity of word" pleasure," 285

Make-beliove, 280
Mammals, early small-brained, 168
Manipulation (Stout), 251
MARCUAL, Prof., on instincts of
Cerceris, 74

MARSHALL, Mr. H. R., on instinct,
66

Martin, nest-building of, 112
MARTINEAU, James, on pleasure
and pain, 284

MAUPAS, M., observations on, in-
fusoria, 4

MAYER, Dr. A. G., on mating,

instinct of moths, 83
McCook, Dr., on ants, 214
Meaning, Dr. Stout's use of term,
46, 243, 268

MEDLICOTT, Mr. H. B., on behaviour
of wild pigs, 196
Megapodes, instinctive flight of,

87

PALEY, definition of instinct, 61
Paramecium, behaviour of, 3, 296
Partridge, note of young, 93
PECKHAM, Dr. G. W., on instinct,
65; ou solitary wasps, 72 ft.,
126 ff.

Pecking instinct of chicks, 93
Peewit, note of young, 93
Pelopæus, instincts of, 72

Perceptual stage of mental develop-
ment, 59

Personality, 245, 257

Phonsants, noto of young, 92; in-
horited co-ordination in, 95;
plumage of Argus, 262

Philanthus, prey of, 73: mode of
stinging prey, 74

Physiological aspect of animal
behaviour, 295

Pigeons, nests of, 136

Pigs, wild, behaviour of, 196

Plants, behaviour of, 24

Rational

R

process distinguished

from intelligent, 59, 138

Reflex action, 31, 35, 298 ff.; rela-
tion of instinct to, 70
Relationships, importance of, 202
Re-presentative elements distin-
guished from presentative, 46
Rhynchites, instinct of, 121
ROMANES, G. J., on "discrimina-
tion" and "perception" in
plants, 32; on instincts of soli-
tary wasps, 73; definition of
instinct, 99; on primary and
secondary instincts, 107, 109; on
ants, 126; on general ideas, 166;
on animal communication, 201;
on cruelty in cat, 277
ROMANES, Miss, observations on

capuchin monkey, 188, 278
Roots of spinal nerves, 299
ROTHNEY, Mr. G. A. G., on Indian
ants, 212

SCHNEIDER on octopus, 157

SCOTT, Dr. D. H., on fern fertiliza-
tion, 25

Scratching in duckling, 96

Sea anemone, diffused nervous
system of, 32
Secondary
107, 109

instincts (Romanes),

Segmental nature of central ner-
vous system, 299

Selection, functional, 163; natural,
shielding of chicks from, 111;
under uniform and variable cir-
cumstances, 175; in playtime of
life, 319; sexual, 261 ff., 313
Self, as ideal construction, 239
Sentience, 62; origin of, 330
Sexual selection, 261 ff., 313
SHARP, Dr. D., on birch-wcevil,
121; on Ecophylla, 210
SHELLARD, Mr. E. J., observations
on staghound, 144

SHERRINGTON, Prof., on emotion,
292; on spinal animal, 298 ff.
Shock effects of physiological, 302
SIMCOX, Miss Edith, quoted, 320
Sitaris, instincts of, 82

Slave ants, 215

Snails, observations on, 157

Social behaviour, 179; evolution
of, 225

Solitary wasps, instincts of, 72 ff.;
intelligence of, 126 ff.

Solomon Islands, rats of, 222
Sounds emitted by young birds,

92

V

Valisneria, fertilization of, 28
Variation defined, 36; origin of,
327

Venus's fly-trap, behaviour of, 26
Vigour, play due to surplus, 248
Volition as conative, 238

W

WALLACE, Dr. A. R., on sexual
selection, 264

WALLASCHEK, Mr., on play as sur-
plus vigour, 248
Wapiti, antlers of, 16

WASMANN, Dr., on insects asso-
ciated with ants, 213

Wasps, solitary, instincts of, 72 ff.;
intelligence of, 126 ff.

WEIR, Mr. Jenner, on canaries,
135

WEISMANN, Prof., on origin of in-
stinct, 108

WHITMAN, Prof., on Clepsine, 159
WHITMEE, Rev. S. J., on tooth-
billed pigeon, 221
Will, metaphysics of, 307
WILLISTON, Dr. S. W.,
on Ammophila, 127

observation

WOOD, Mr. Foster, ou hen-swim-
ming, 86

WORCESTER, Dr., on megapode, 87
WUNDT, Prof., on instinct, 65, 99,
106

Y

Youth, plasticity of, 167
Yucca moth, instincts of, 82