INDEX. 393 



by Mammals, 95 j on evolution of sense-organs, 98 104 ; on colour- 

 sense, 100. 



Hall, G-. Stanley, on hypnotism lengthening reaction-time in perception, 138. 



Hamilton, Sir W., on pleasures and pains, 105 ; on inverse relation between 

 instinct and reason, 338. 



Hancock, on dogs not barking in Guinea, 250. 



Handcock, on obliteration of natural instincts under domestication, 231. 



Hand\^Titing, inheritance of, 194. 



Hate, in animals, 341, 345. 



Haust, on ducks building in trees, 211. 



Hawfinch, learning the song of a blackbu'd, 222. 



Hawk, eye of, 91 ; old, teaching young to capture prey, 226 ; changed in- 

 stincts of Swallow-tailed, 254. 



Hearing, sense of, in Medusae, 82 ; in Articulata, 86-7 ; in Mollusca, 88-9 ; 

 in Fish, 90 ; in Amphibia and Keptiles, 90 ; in Birds, 91-2 ; in Mam- 

 mals, 93-4 ; reaction-time of, 132. 



Selix pomatia, memory in, 122. 



Helmholtz, Professor, on reaction-time as increased by complexity of percep- 

 tion, 133. 



Hen, instinct of cackling in the, 176, 289 ; wildness of the, when crossed with 

 a pheasant, 199; conveying young, 211; experiments and observations 

 on the incubating and natural instincts of the, 213-17 ; drinking move- 

 ments of tbe, not instinctive, 229 ; loss of incubating instinct of the 

 Spanish, 212. 



Hennabe, on the hyrax dreaming, 149. 



Heredity, in relation to reflex action, 17-18 ; influence of, on formation of 

 nervous structures, 33 ; in association of ideas, 43 ; in reference to sensa- 

 tion, 95-104 ; to pleasures and pains, 105-11 ; t.o memory and associa- 

 tion of ideas, 111-24 ; to perception, 130-41 ; to instinct, 180, 185-92, 

 200-3, 231-42 ; of handwriting and psychological character, 194-5 ; 

 of begging in dogs and cats, 195-6 ; of wildness and tameness, 195-7 ; 

 of artificial paces in horses, 188 ; with reference to migration, 289, 296-7. 



Hering, on muscle strengthening by use, 112. 



Herman, on reaction-times of different senses, 132 ; on inherited knowledge 

 shown by sporting dogs, 239. 



Meteropoda, eyes of, 88. 



Hertwig, Professors O. and E., on nervous system of Medusce, 69. 



Hewetson, on variation in the nest of the nuthatch, 182. 



Hewett, on wildness of hybrids between fowls and pheasants, 199. 



Hill, Richard, on gi-egarious habits in nidification, 253. 



Hitzig, on functions of the cerebrum, 35. 



Hofacker, on inheritance of handwriting, 194. 



Hoffmann, Professor, on a puppy learning to imitate a cat, 224. 



Hogg, on instincts of a sheep-dog, 240-1. 



Hollman, on memory in Cephalopoda, 122. 



Homing-faculty of animals, 95, 153-4. 



Home-sickness in animals, proof of imagination, 151-2. 



Honig-Schnied, on reaction-time for taste, 133. 



Hornbill, nidification of the, 255. 



Horse, memory in the, 124; inheritance by the, of artificial paces, 188; 

 useless instincts of the, 190 ; natural tameness of the feral, 196 ; sense 

 of direction in the, 289-91. 



Houdin, Robert, remembering his art of juggling with balls, 36; on rapidity 

 of perception acqiured by training, 138. 



House-fly, mistaken instinct of the, 167. 



