344 
Sphex, mode of carrying prey to 
nest, 77, 172 
Spiders placed in crotch by wasps, 
153 
Stereotyped behaviour, 172 
Sticklebacks, observations on, 130 
Stour, Dr. G. F., on “meaning” 
for consciousness, 46, 243, 268 ; 
on ideational and _ perceptual 
stages of mental development, 
59, 271; on octopus, 158; on 
conative process, 235; on the 
self, 239; on manipulation, 251 ; 
on emotion, 293 
StrrancE, Mr., on bower-bird, 261 
Subject and object, 245, 276 
Sun-dew leaf, behaviour of, 25 
Swimming, instinctive, 85 
dy 
Tart, Lawson, on begging-cat, 110 
Tarps, M., on imitation as a 
social factor, 179 
Tendencies, congenital, 176 
Tuomas, Mr. Oldfield, on rats of 
Solomon Islands, 222 
THORNDIKE, Dr., on swimming of 
chick, 85; experiments on in- 
telligence, 147 ff.; experiments 
on imitation, 179, 183 ff. 
Tradition, animal, 220 
Trial and error, method of, 139 
U 
Unity of perceptual process, 240 ; 
of biological purpose, 297 
Use, super-normal, 170; relation 
of, to heredity, 171, 177 
THE 
INDEX 
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 
WwW 
Watuaocz, 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- 
stinet, 109 
Wurman, Prof., on Clepsine, 159 
Wuirmer, Rey. 8. J., on tooth- 
billed pigeon, 221 
Will, metaphysics of, 307 
Wiuuiston, Dr. 8S. W., observation 
on Ammophila, 127 
Woop, Mr. Foster, on hen-swim- 
ming, 86 
Worcester, Dr., on megapode, 87 
Wonpt, Prof., on instinct, 65, 99, 
106. 
¥ 
Youth, plasticity of, 168 
Yucca moth, instincts of, 82 
END 
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