INDEX 



399 



manteau theory,' ii. 3 ; experiinents 



with sea-urcliins, 342. 

 Desert aniruals, sympathetic colouring in, 



62. 

 Determinants, active and passive state, 



380; controlling the cells, 381 ; proofs of 



their existence, 361, 371, 408 ; in limbs 



of Arthropods, 361 ; liberation of, 382 ; 



size and number, 369. 

 Determinates, 355, 

 Deutoplasm, 280. 

 Dewitz, degeneration of wings in the 



ontogeny of worker-ants, ii. 90. 

 Diatoms, ii. 324. 

 Dimorphism, sexual, its idioplasmatic 



cause, 388. 

 Disappearance of disused jiarts, ii. 135 ; 



unequal rate of, ii. 129. 

 Dividing apparatus of the ovum, 288, 308. 

 Division, proof of differential nuclear 



division {Phylloxera), 377 ; multij^lication 



by division, ii. i. 

 Dixon, isolation as a condition of species 



formation, ii. 284. 

 Doderlein, increase of characters in dilu- 

 vial forms, ii. 139. 

 Dog, breeds of, 31 ; attachment to man, 



ii- 73- 

 Driesch, 'prospective' importance of a cell, 



378, 408. 

 Dzierzon, discovery of parthenogenesis in 



bees, 303. 



Echinoderms, mesoderm cells of, 386. 387. 



Ectocarpus, 334. 



Egg-cell, form and structure, 280 ; its 



migi-ations, 281. 

 Ehrlich, experiments with ricin and abrin, 



ii. 106. 

 Eigenmann, on blind cave-salamanders, 



ii. 347 ; on species of Leptocephalus, ii. 



133- 

 Eisig, on symbiosis, 162. 

 Elimination, ratio of, 47. 

 Elymnias, a genus of mimetic butterflies, 



103. 

 Emery, on extinction of species, ii. 357 ; 



on Colohopsis truncata, ii. 96 ; on germinal 



selection, ii. 139 ; ' mixed ' forms in 



ants, ii. 93 ; variation of homologous 



parts, ii. 189. 

 Empedocles, 9 ; ii. 370, 378. 

 Endemic species, ii. 283. 

 Endres, 'prospective' significance of the 



blastomeres of the ovum of the frog, 407. 

 Eijigenesis and evolution. 350. 

 Epilepsy, artificial, in guinea-pigs. ii. 67. 

 Equilibrium between species of a region, 



49. 

 Evolution, fphyletic, ii. 332 ; paths of, 



ii. 381 ; forces of, ii. 381 ; mechanism 



o* 353 ; facts of, 406. 

 Evolution, progressive, attempt of specie^ 



to extend its range, ii. 383 ; unlimited 



diversityof forms of life. ii. 391 ; parable 



of the traveller, ii. 386. 



Evolution theory, general meaning of, 6; 



•prospective ' import of the cell, 378. 

 Exner, electric adaptation of the fur of 



mammals and feathers of birds, ii. 316 ; 



vision of insects, 2] 6. 

 Eye-spots, 69 ; ii. i 79. 



Falkland Islands, inllucnce of climate on 

 cattle and horses, ii. 268. 



Feathers, regarded as an adaptation, ii. 

 316. 



Fertilization, process of, 286 ; in lichens. 

 313 ; in J.scari's, 296 ; in the sea-urchin 

 ovum, 293; in Phanerogams, 313; in 

 higher plants, ii. 251 ; importance of the 

 chromatin, 290 ; conjugation, 317 ; the 

 centrosphere the dividing apparatus of 

 the cell, 289 ; chromatin the hereditary 

 substance. 287 ; differentiation of in- 

 dividuals among the Protozoa, 322 ; 

 number of chromosomes reduced to half, 

 297 ; role of the centrosphere, 308 ; 

 summary of j^rocess of fertilization, 343. 



Fischel, segmentation of the Ctenophore 

 ovum, 408 ; regeneration of the lens in 

 Triton, ii. 20. 



Fischer, E., experiments with butterffy 

 pupae in low temperature, ii. 275. 



Flowers, origin of, 179 ; adaptation to 

 insects, 189 ; in Aristolocltia, Pinguiculu, 

 and BuplniP, 186 ; colour as an attrac- 

 tion to insects, 195 ; ct)llecting apparatus 

 of bee, 193 ; cross-fertilization, means for 

 securing, 182; in Salvia, 183; lousewort, 

 184 ; flowers adapted to fly-visits, 185 ; 

 orchids, 187 ; deceptive flowers, Cypri- 

 pedimn, 200 ; fertilization of Yucca. 202 ; 

 imperfection of adaptation a proof of 

 origin through selection, 204 ; mouth- 

 parts of insects, 189; bee, 172; butter- 

 fly, 193 ; cockroach, 191 ; wind-ijolli •• 

 nation, 182. 



Forel. Auguste, alarm-signals in ants, ii. 



83. 



Fraisse, on regeneration, ii. 30. 



Function, passively functioning parts in 

 relation to the Lamarckian jirinciple, 

 ii. 77 ; harmonious adaptation in these, 

 ii. 81. 



Fungi, reproduction of. ii. 267. 



Fur of mammals, adaptation to the con- 

 ditions of life. ii. 269. 



Galapagos Islands, fauna of, ii. 283, 292. 



Galileo. Galilei, 13. 



Galls, plant, 385 ; ii, 271. 



Gall-wasps, reproduction of, ii. 245. 



Galton, Francis, on continuity of the 

 germ-plasm, 411 ; on inhei-itance of 

 talents, ii. 150 ; curves of frequency, 

 ii. 206 ; doubt of the Lamarckian prin- 

 ciple, 242. 



Genius, human, ii. 394. 



Germ - cells, and somatic cells, 411; 



f- development of, 410: tlieir mutual 

 attraction, ii. 230. 



