508 



Index. 



1 KM -it, D:., Fig. of skull of 



Habits of animals, 415 



H&MMrBrtem 388 Habitual activities, 420; 



Frog, development of. 6 ; arrest of satisfaction in performance 

 of life in, -i\ ; respiration in, of, 421 



24 ; fishing, or aiigler-lish. i.l ; HAH KKL, I'rof., plastidules of, i 

 modified development of, 214; 125: the-ory epf pel ig-nt-sis, 159 

 effects of siiiuile- stimulus on, Ilalictns cylindrical. <* 

 '!"."> ~ - i HAMKKTOS, Mr. P. G., on the ; 



Fruits and flowers, selection of, i ignorance of animals, 333 

 83 HA M.I ION, Sir \Vni., quoted. 470 I 



! HANCOCK. Mr. John, on instinct 

 i of cuckoo, 437 



GABET, Messrs. Hue and, on HASSK, E , on humble-bees, 259 

 Llama cow, 333 j HAUSEK, on cockchafer, 259 



Galapagos Archipelago, species j HAYCROFT, Mr. J. B., on taste, 

 and varieties in, 99 ; climate 250 

 of, 109 Hearing, sense of, 261 



Gallut bankiva. 230 Ueliconia, 203 



I.AI.ION, Mr. Francis, on the \ Helix, nemoralit and hortenrit, 

 coloration of the zebra. 84; variation of, 75, 217, 226, 239 

 his modification of pangenesis, HELMHOI.TZ, Von. on colour, 277 ; 

 135 ; numerical estimate of in- > on local signs of retina, 308 

 heritance, 15u, 192; his inves- | Hen and egg, problem of, 130 I 

 tigati.ms on twins, 169; on i HEKSEN, on shrimps, 266 

 blended characters, 225 ; on 

 the steps of evolution, 227 



Ganglia, 31 



Gannet, rate of increase of, 57 



Gas-engine, analogy of, 30 



GAUTIKR, Theophile, his cat, 264 



GEDDEs,Prof. Patrick, and THOM- 

 SON, J. A., on anabolism and 

 kutabolism, 44; quoted, 50, 

 137, 237 



Gemmules, pangenetic, 131 



Generations, alternation of, 46 



Generic idea, 326 



Geographical barriers a means 

 of segregation. 99 



Geological changes, influence on 

 natural selection, 1 13 



Germ-plasm, continuity of. 138 ; 

 convenience of, 140 



Gills of mussel, 4 ; as respiratory 

 organs, 24 



Giraffe, co-ordinated variations 

 in, 212 



Gliicial epoch, effects of, 113 



Gland, pineal, 288 



Goldfinch, song of, 454 



GOLDSCHNEIDER, on tempera- 

 ture-sense, 249 



GOVI.D, Dr., on humming-birds' 

 nests, 408 



GRABER, Dr., on colour-sensitive- 

 ness of earthworm, 293 



GKANT, Mr. G. L, on New Zea- 

 land sparrows, 445 



Grasshopper, auditory organ of, 

 266 



Gregarina, reproduction in, 38 



GRENACHER, Dr., experiment on 

 moth's eye, 290 



Grouse, white plumage in, due 

 to reversion, 'j^t 



GROVE, Sir W. R., on antago- 

 nism. 394 



Growth of organisms, 5 ; illus- 

 tration of a deer's antler, 28 ; 

 law of, after mutilation, 126 



Guidance distinguished from ori- 

 gin, 242 



Guillemot, eggs of, 410 



GULICK, Rev. J. T.,on landshells 

 of Sandwich Islands, 109; on 

 tendency to divergen. 

 v.i i-i-v, Mr, oil crab of Solomon 



HERBKET, Prof. T. M., quoted, 



471 

 HERDMAX, Prof., on sea-slug 



(Doris), 84; his modification 



of pangenesis, 135 ; on warn- 



ing coloration in uudibranchs, 



252 

 Heredity, an organic application j 



of the law of persistence, 62 ; ! 



and the origin of variations, 



122; in protozoa, 123; and re- 



generation of lost parts, 124; 



failure of, 192; and instinct, 



435 

 H EKING, Edward, on organic 



memory, 62, 475 

 HERON, Sir R., on crossing rab- 



bits, 225 

 HERSI HELL, Sir John, on colour, 



277 

 HF.RTWIG, Richard, observations 



on Infusoria, 39 

 HICKS, on Capricorn beetle, 267 

 HICKS' organ, 267 

 HICKSON, Dr., Fig. of eye of fly, 



Hipparion, 118 

 Hippopotamus, instinctive acti- 



ippopotamu 

 vities in, 42 



HOLLAND, Sir Henry, on inheri- 

 tance, 223 



Homing faculty of bees, 428 



Horse, two different evolutions 

 oJ.118 ; effects of use on digits 

 of, 210; sense of pain in, 392 



HOWSE, Prof., antennule of cray- 

 fish, 259 



HfBEH, Pierre, on smell in bees, 

 257 ; judgment and instinct, 

 452 



Hue and GABET, Messrs., on 

 Llama cow, 333 



Hi ..'. is-. Dr., his dog Kepler, 

 396 



Humming-birds. 110 



Humour, sense of, in dog, 406 



lit XLKY. T. H., on limitation of 

 variations, 151; on neurosis 

 and psychosis, 466 



HYATT. I'rof., on acceleration and 

 retardation, 221 



Hybrid.-, fe-rtility of, 105 



Hydra, ropr. duction of, 14, 41 ; 

 i diagram of, 43; artificial divi- 



sion of, 121 : budding U 



sexual reproeliietip.i, of, 129 

 llvilra tuba, ami n 



Ifa, 45 

 Hydroid-. .level.,, : 



\Vi.i-iiiii!in cm. ,:>: 

 Ilyiiii-ii..ptcra, .-inti-niia:.. 



ton* Of, 9*1; instinctsolso. i.il, 



441, 448 



Ichneumon fly, in-tinct >f. :: 

 Irhthyosauru*. pirn -.ii > > 

 Irl: ri<lif, 454 

 Idea of nn object, 313 

 ideas, conceptual, their t-nviron- 

 iii' lit. 45; the law ol tin ir 

 evolution, 486 

 Idealism, 474 

 ignorance ot animals, 333 

 linng". inverted in retina, 311 

 Imagination, constructive-, ::'J.". 

 Imitation as a Lector in habit or 



instinct. 443. 453 

 Immortality of protozoa, 12 

 Incongruity, elimination by, 486 

 Increase, law of, 5 

 Incubation, instinct of, 434 

 Individuality, a tendency to dif- 

 ferentiation, 1H3 

 Inference, conscious and uncon- 

 scious, 32f; in animals, 361 

 Infertility of isolated forms, 10S 

 Infusoria, roprcxluction in, 39 

 Inheritance, exclusive, a means 

 of isolation, 104 ; of variations, 

 223 ; of acquired habits, 4:t5 ; 

 of acqui'ed increments of in- 

 tellectual faculty, 4H7 

 Inhibition, 35; a.s a condition of 



volition, 459 



Innate capacity, 422; its impor- 

 tance, 429 



Insects, tracheal respiration of, 

 3, 24; wingless, of Madeira, 

 81; of Kerguelen Island, -1 ; 

 mimirry and protective i.-- 

 st-mblance in, 85, 88 ; segn ga- 

 tion by colour, 101; antenna* 

 of, 178; mouth-organs of, 17'.t; 

 and the evolution of (lowers, 

 206; sense of touch in, 'Ji-; 

 taste in, 253; smell in, 257 ; 

 hearing in, 266 ; sight in. 2--; 

 perceptual powers of, 357 ; 

 neuter, 440 



Instinct and available advantage, 

 211; consideration of, 415; 

 perfect, imperfect, and incom- 

 plete, 422; .|.-ferr.d.423; blind 

 pn vision in. 429; gratification 

 in performance of, 4:iii ; c..n- 

 t-ciousness and, 4a2; primary 

 and secondary, 434 ; three 

 factors in the origin of, 447 ; 

 as influenced by intelligence-, 

 452; by imitation, 453 ; by edu- 

 cation, 455; as distinguished 

 from intelligence, 457 

 Instinctive emotion. 390. 395 

 Integration and differentiation, 



183 



Intellectual development, 4-rt 

 Intelligence- involve-d in celec- 

 ti.in. HTi: distinguished from 

 reason, 330. 365 ; lap- 

 involved in .nstinct, 440; as 

 influencing in-timt. i. 

 teria of. 466 



