INDEX. 401 



earliest age at which an infant is abk^ to associate ideas, 120-1 ; on 

 inability of hermit-crab to associate simple ideas, 122 3; on time-rela- 

 tions in perception, 136-7 ; on sense of mysterious in, and appreciation 

 of cause by dogs, 155-8 ; on instinctive antipathy of young rabbits to 

 ferrets, 164-5; on handwriting, 19-4; on incubatory instincts, 213-14; 

 on animals dying of terror, 307-8 ; on instincts and emotions of the pro- 

 cessional caterpillar, 342-3 



Rooks, associating with starlings, 185. 



Rosa, Baptista, on instincts of the capon, l7l. 



Ross, Sir J., on dogs learning how to attack wild cattle, 221. 



Roulin, on cats not howling in South America, 250. 



Routh, Dr., on a puppy learning to imitate a cat, 224. 



Roy, Le, on imagination of wild animals, 146-7 ; on mental characters of a 

 dog of wild parentage, 198 ; on the migration of birds, 289. 



s. 



Sainfc-Hilaire, Greoffroy, on intelligence of an orang-outang, 328. 



Salmon. See Fish. 



Satiety, sense of, 95. 



Savages, sense of direction in, 289, 291 ; tendency to imitation shown by, 

 225. 



Schafer, Professor E. A., on nervous system of Aurelia aurita, 69. 



Schneider, on sense of vision in Serpulce, 86. 



Scorpion, alleged instinct of the, to commit suicide, 278. 



Sebright, Sir J., on natural wildness and tameness of rabbits and ducks, 

 196 ; on instincts of an Austi-alian puppy, 232 ; on love of man as in- 

 stinctive in domestic dogs, 239. 



Seebohm, on migi'ation of biixis, 289. 



Scinus hudsonms, change of instincts in, 248. 



Seneca, on dreaming in dogs, 148. 



Sensation, as compound, 40-1 ; physiological aspect of, 51-2 ; defined, 78 ; 

 survey of, in animal kingdom, 80-95 ; of temperature, 95-8 ; of colour, 

 98-103 ; as distinguished from perception, 125-6 ; as stimulus to reflex 

 action, 159-60. 



Sense, muscular, 95 ; of hunger, thirst, and satiety, 95; of temperature, 96-8 ; 

 of colour, 98-104. 



Serpent. See Reptiles. 



Serpulce, sense of vision in, 86. 



Setter. See Dog. 



Sexual affection- and selection, 341, 344. 



Shame, in animals, 341, 347. 



Shaw, J., on stupidity of dogs in China and Polynesian Islands, 233. 



Sheep, learning to avoid poisonous herbs, 224, 227 ; changed instincts of 

 under domestication, 232 ; killed by parrots, 248 ; sense of direction in, 

 290. 



Sheep-dog. See Dog. 



Shrew-mouse of South Africa, injurious instinct of the, 169 and 280. 



Shuttleworth, Miss C, on mistaken instinct of bees and was])s, 167. 



Sight, sense of, in Protista, 81 ; in Medusae, 81-2 ; in Echiuodcrmata, 84 ; of 

 simple and compound eyes, 84-5; of Worms, 85-6; of Fish, 89; of 

 Amphibia and Reptiles, 90-1 ; of Birds, 91 ; of Mammals, 92 ; reaction- 

 time of, 133 ; in young animals, 161-4. 



Sigismund, on infants remembering the taste of milk, 114. 



2 c 



