Index. 



507 



236 ; on the greater variability 

 of nialp, 237 ; on attention in 

 monkeys, 342; on brain of ant, 

 358 ; oil gestures of anger and 

 rage, 389 ; on pleasures and 

 pains of animals, 394 ; on 

 bravery of a monkey, 396 ; on 

 Abyssinian baboons, 405 ; on 

 sense of humour in the dog, 

 406 ; on neuter insects, 440 ; 

 on selection of oxen, 441 ; on 

 acquisition of fear of man by 

 birds, 443 ; on satin bower 

 bird, 450 



Death, natural introduction of, 

 186, 193 



Deceit in dogs, 400 



Degeneration, 183 



Desert animals, inconspicuous- 

 ness of, 89 



DESCARTES on pineal gland, 288 



Desire, 460, 463 



Destruction, indiscriminate, as 

 opposed to elimination, 76 



Development of organisms dis- 

 tinct from growth, 6 ; repro- 

 duction and, 36 ; is differential 

 growth, 49 ; of a vertebrate, 

 diagrammatic account of, 51 ; 

 comparative, of some verte- 

 brates, 2'20 



DK VRIES, 132, 159 



Differentiation in protozoa, 40 ; 

 in metazoa, 41 ; during de- 

 velopment, 49; of reproduc- 

 tive cells, 143; and integra- 

 tion, 183 ; of tissues, 232 



Difflvgia, 360 



Dimorphism in larvae, 187 



Discrimination in the sense of 

 touch, 245 ; hearing, 262 ; 

 sight, 275 ; its fundamental 

 nature, 338 ; in sea-anemone, 

 359 



Disease, elimination by, 80 



Display, 207 



Disuse, panmixia and, 189; ne- 

 gative and not positive, 196 ; 

 use and, 209 



Divergence among birds, illus- 

 trated from Wallace, 97 ; 

 through diverse adaptation, 111 



DIXON, Mr. Charles, effects of 

 climate on the colours of birds, 

 164 ; on chaffinch nests, 454 



Dog, effect of Indian climate 

 on, 164, 167 ; greyhounds in 

 Mexico, 167 ; sense of smell 

 in, 255, 338 ; vague percept of, 

 339 ; and the feelings of other 

 animals. 340 ; and pictures, 

 341; powers of communica- 

 tion, 344 ; swimming rivers, 

 365 ; cleverness of, 367 ; sym- 

 pathy in, 397 ; idea of caste, 

 deceit, 400 ; endurance of pain, 

 402; sense of justice in, 404; 

 punishing pup, 405 ; sense of 

 humour in, 406 ; swimming a 

 deferred instinct in, 423 ; turn- 

 ing round to make a couch, 444 



Dog-fish, sense of smell in, 257 



Domesticatit >n .variations effected 

 by, 171, 215; crossing and re- 

 version, 230 



Jn.ri!: luliin-ulata, S4 



Dreaming, 34] ; and the animis- 

 tic hypothesis, 495 



Dromia vuJgarif, 457 



Drones developed from unfer- 

 tilized ova, 45 ; second polar 

 cell extruded. 153 



DUBOIS, M., on Proteus, 294 



Ducks, Sir J. Crichton Browne 

 on, 171; Dr. Rae on instinc- 

 tive wildness of, 435 



Duration of life, 186 



Expectation, 327 



Experience dependent on me- 

 mory, 305 



Expression of the emotions, 385 



Eye, structure of in man, 274 ; 

 in mole, 284 ; pineal, 287 ; in 

 insects, 288 ; facetted, 289 ; in 

 Crustacea, 292; in molluscs, 

 292 ; four types of, 294 



Eagle, sclerotic plates of, 437 



Ear, 263 FABRE, M., on Sitaris. 439 



Earthworm, respiration in, 4, I Facetted eye, 289 



24 ; regeneration of lost parts, j Factors of phenomena, laws of, 



41 ; sensitive to light, 293 ; | 61 



outward projection in, 359 Falkland Islands, cattle of, 102; 

 EATON, Rev. A. E., on insects of ! birds of, 443 



Fear, dread and terror, 387 ; in- 

 stinct of, 443 

 Feelings of animals, 8,378 



Kerguelen Island, 81 

 Ecitons, 427 



Economy, principle of, 194 



Education of ants, 428 ; of young I Female. See Sex-differentiation, 

 animals, 455 j Female and male insects, differ- 



Egg and hen, problem of, 130 i ences between, 179; vigour 

 Egg-cell and sperm-cell, diagram : expended on offspring, 238 

 of, 13; conditions which deter- Fertilization, nature of, 42; ab- 

 mine pr<iduction of, 60 | sent in parthenogenetic forms, 



Epgs, influence of food-yolk on I 44 



mode of development of, 56; : Fertility, differential, Darwinand 

 destruction of birds, 189 j Romanes on, 104 ; of hybrids, 



Ego, or self, 475 ] 105 



EIJIER. Prof., on inhabitants of Fetishism, its natural genesis, 

 Nile valley, 165; on Helix 492 



horttnsis, 226 ; on instinct, FISCHER, Dr. Emil, on smell, 254 

 436 ; on differential dread in Fish, respiration in, 24 ; prolec- 

 birds, 444 tive resemblance in, 83 ; 



Eject, meaning of, 476 i amount of food-yolk in eggs 



Elaboration, 183 of, 220 ; skate and turbot corn- 



Elephant, rate of increase of, 57 ; j pared, 220 ; sense of taste in, 



intelligence of, 363, 369; 

 of tools by, 370 ; vindictive- 

 ness in, 401 



252; sense of smell in, 256; 

 sense of hearing in, 264 ; sense 

 of sight in, 286 ; fascination in, 

 i ; love-antics of, 450 



Elimination, as opposed to selec- ; 



tion, 79 ; its three modes, 80 ; ! FISK, Rev. G. H. R., on sym- 

 as a factor in the origin of in- pathy in cat, 397 

 stinct, 447; of ideas through Fission, a process of cell-division, 

 incongruity, 486 ; as applied 37 ; in protozoa, 38 ; in meta- 

 to the intellectual faculties, 497 I zoa, 41 



Embryologv negativ* s pr forma- Flight, instinctive nature of, 425 

 ti,,n, 50 * FI...I KI-.NS, M.. on function of 



Emotions exemplified, 382; the semicircular canals, 269 

 expression of, 35 : three orders Flowers and fruits, selection of, 

 of, 391 ; in vertebrata, 395 j 93 ; evolved through insect 



Encystment, 3H, 49 ! agency, 206 



Ends and means, 371 Folliculina, 360 



Energy, relations of animals and Food-stuffs, relations of animals 

 plants to, 16 ! and plants to, 15; nature of 



Enrxmios tiUaria, caterpillar, and digestion of, 25 

 protective resemblance of, 85 Food-yolk, influence of, on de- 



Eiivircjiiniont, direct effects of on : velopment, 55; the result of 

 the organism. 163 ; changes of, parental sacrifice, 57 

 in relation to the organism, FORBES, H.O., on Javan spiders, 

 183; are effects of direct or 90 

 indirect? 233; instances of FORET,, M., on taste of ants, 253 ; 



effects of, 238 



Kquus, 118 



Eristalis tenaz, 87 



Ethics in animals, 413 



Euplva, 203 



Evolution of older writers, 50 ; 

 and revolution, 119; organic, 

 177: meaning of term, 182; 

 mental, 464 ; organic and men- 

 tal not continuous, 48B ; inter- 

 neural, 490 



E.xcrcnieiit of birds, resemblance 

 of spider to, 90 



ision of daphnids, 296 ; on 

 happy family of ant*, 428 



Form-characteristics of animals, 

 2 



Fortuitous variation, 235 



Fosterage and protection, 219 

 result of female self-sacrifice, 

 | 238 



FOTHKKGILI., Mr., on dogs swim- 

 ming rivers, 364 



Fowl, variations :n, attril.utr.l l.y 

 liaiuin to use, 171; crossing 

 of, 2^7, 



Excretion, an* ewenti*] lifc-pp'- i x, cunning f, 3M 



:-,, 29 FRANCIS, Mr. H. A., 90 



