284 
Baldwin, J. M., 138, 178, imitation, 
257 
contra Lamarckism, 124 
organic selection, 136 ff 
pleasure and pain in accommo- 
dation, 173-175 
problem of learning, 172 
Ball, W. P., 138 
Bancroft, F. W., 61, electrotaxis in 
Paramecium, 60 
Barotaxis defined, 34 
Bateson, W., 230, intelligence in 
fishes, 220 
Bees, communication, 215 
homing, 193, 196 ff 
influence of numbers on pug- 
nacity, 207-209 
intelligence, 193, 196-201, 207— 
209, 215 
and Lamarkism, 126 ff 
remembering flowers, 200-202 
Beetles, intelligence, 192, 206 
Belt, T., intelligence of Cebus, 267 
intelligence of wasp, 195 
Bentley, I. M., intelligence of chub, 
222 
Bentley, M. See Day, 87 
Berry, C. S., 258, imitation in cats, 
256 
imitation in white rat, 255, 
256 
Bethe, A., 16, 189, 215, conscious- 
ness in animals, 4, 6 
homing of ants and bees, 193, 
199 
homing of limpets, 187 
lack of learning in Carcinus, 
182, 183 
Binet, A., 89, behavior of Protozoa, 
63-65 
capture of food in Didinium, 
78 
relation of reason to percep- 
tion, 248 
Birds, fear in, 96, 121-123 
imitation in, 254, 257 
INDEX 
Birds, intelligence, 165, 166, 176- 
178 
migration, 108 
variations in instinct, 133. See 
also particular species 
Blanchard, E., intelligence of 
beetle, 206 
Blow-flies, instincts, 93 
phototaxis .of larve, 21, 42, 
43 
Bodo, capture of prey, 64, 65 
Bohn, G., 10, 61, 162, conscious- 
ness in animals, 4 
definition of instinct, 92 
differential sensibility, 152 
fatigue sensorielle, 143 
geotaxis in Convoluta, 31, 156 
homing of limpet, 118 
law of varied responsiveness, 
145 
phototaxis of Littorina, 156, 
157; of Pleurosigma, 156 
reactions of Cerianthus, 144, 
145 
reactions of animals to colored 
lights, 47 
rhythms of activity, 155 ff 
tidal rhythms of Convoluta, 
31, 156; of Pleurosigma, 
156; of anemones, 158; 
of Littorina, 156, 157 
tropisms, 18 
Bostok, F., 258 
Branchellion, interference of reac- 
tions, 140 
Brehm, A., 279 
Bumble-bees, 208, 209, 215 
Burroughs, J., 258 
Buttel-Reepen, H. von, 216, com- 
munication in bees, 215 
courage in bees, 207 
homing in bees, 193, 197 
evolution of the 
bee community, 128 
Carcinus, intelligence, 182-184 
