INDEX 



401 



Idants, 349. 



Ids, 349 ; male and female, 389 ; mimicry 

 a proof of the existence of, 390. 



Immortality, potential, of the Protozoa, 

 260. 



Immunity of butterflies, 99. 



Imperfection of adaptation, 203. 



Inbreeding, evil consequences of, ii. 

 231. 



Infection of the germ, ii. 69. 



Infusorians, experiments of Maupas on, 

 328; Calkins on, 329 ; differentiation of 

 nucleus into macro- and micro-nucleus 

 a means of compelling conjugation, 334. 



Inheritance, of acquired characters, ii. 62 

 (see also Lamarckian principle) ; of func- 

 tional modifications, ii. 64 ; of mutila- 

 tions disproved, ii. 65 ; from parent to 

 child, ii. 38 ; hereditary substance, 288, 

 341 ; preponderance of one parent, ii. 

 47 ; alternation in ontogeny, ii. 48. 



Instinct, 141, ii. 70 ; will and, 152. 



Instincts, aberrant, 149 ; attachment of 

 dog, ii. 73 ; change of, in Eristalis, &e. , 

 150 ; egg-laying of butterfly, 159 ; exer- 

 cised only once, 155 ; ii. 75 ; ' feigning 

 death,' 145 ; imperfectly adapted, 152 ; 

 inheritance of, ii. 72 ; masking of crabs, 

 145 ; material basis of, 142 ; monophagy 

 of caterpillars, 146 ; new in domesti- 

 cated animals, ii. 73 ; nutritive, 146 ; 

 in Ephemerids and sea-cucumbers, 148 ; 

 in predatory fishes, 149 ; origin of, ii. 70 ; 

 pupation of butterflies, 156 ; self-pre- 

 servation of, 144 ; wild animals on 

 lonely islands, ii. 73. 



Intra-selection (histonal selection), 240. 



Ischikawa, on chromosomes in unicellu- 

 lars, ii. 216 ; on the conjugation of 

 Noctiluca, 317 ; ii. 42. 



Island faunas, ii. 283. 



Isolated regions, ii. 284. 



Isolation, favours species-formation, ii. 

 383 ; relative, ii. 350 ; snails on the 

 Sandwich Islands, ii. 292. 



Jilger, Gr., on the continuity of the germ- 

 plasm, 411. 

 Japanese cock, 356. 



Kaleidoscope, transformation resembles a, 

 ii. 307. 



Kallima, mimicry of leaf, 83, 236, 237. 



Karyokinesis, 290. 



Kathariner, birds as enemies of butter- 

 flies, 97. 



Kennel, birds as enemies of butterflies, 



97- 



Kerner von Marilaun, Alpine plants, 122 ; 

 influence of hybridization on the forma- 

 tion of new species, ii. 352. 



Knowledge, limits of, ii. 392. 



KOhler, on scent-scales in the Lycsenidas, 



37°- 

 Koshewnikow, on the influence of royal 

 food on drone-larvae, ii. 92. 



Kiikenthal, on the fur of aquatic mam- 

 mals, ii. 270. 



Lamarck, theory of development, 21 ; on 

 limits of genera and species, ii. 306. 



Lamarckian principle, ii. 62 ; Lamarck 

 regarded inheritance of functional modi- 

 fications as a matter of course, 241 ; 

 cleaning apparatus of bees, ii. 84 ; claw 

 of crustacean, ii. 85 ; Darwin's attitude 

 to, 242 ; facts (foreleg of mole, cricket, 

 &c.), ii. 86 ; Galton's attitude to, 242 ; 

 Bering's view, ii. 109 ; 0. Hertwig's 

 view, ii. 106 ; neuters among ants and 

 bees, ii. 89; phyletic development, 

 ii. 77 ; skeleton of Arthropods, ii. 82 ; 

 stridulating organs, ii. 83 ; theoretical 

 impossibility of, ii. 107 ; variation 

 of passive parts, ii. 77 ; venation of 

 butterfly's wing, ii. 87 ; Zelinder's de- 

 fence of, ii. 99. 



Lathrwa, 135. 



Lauterborn, on amphimixis in diatoms, 

 ii. 216. 



Leaf-imitation, in Locustidse, 88 ; in 

 moths, 87 ; in butterflies, 83, 357-61 ; 

 in AnEea species, ii. 310. 



Lepus vm-iabilis, 62 ; ii. 344, 350. 



Leeuwenhoek, first use of the microscope, 

 14. 



Lexickart, Trkhosommn ei'assicauda, with 

 dwarf males, 227 ; structure of snails, 

 ii. 301. 



Leuckart and von Siebold, 333. 



Leydig, regeneration of the lizard's tail, 

 ii. 30. 



Liberation of the determinants in on- 

 togeny, 382-6 ; quality of nutrition as 

 a liberating stimulus in bees and ants, 

 ii. 92. 



Liebig, theory of the origin of life, ii. 365. 



Limits of knowledge detei-mined by selec- 

 tion, ii. 394. 



Linnfi, conception of species, 14. 



Lloyd Morgan, artificially induced in- 

 stincts, ii. 72. 



Loeb, experiments on regeneration, ii. 6, 7 ; 

 the cell-nucleus as an organ for oxida- 

 tion, ii. 31. 



Luminous organs in deep-sea animals, 

 ii. 321. 



MacCuUock, autotomy, ii. 19. 



Machairodus, ii. 358. 



Mammals, adaptation to aquatic life, 



ii- 333- 



Maturation divisions, ii. 40 ; in plants, 

 315 ; in the ovum, 298 ; in the sperm, 

 301 ; influence of, ii. 44. 



Maupas, intimate processes of conjuga- 

 tion, 319 ; conjugation of Infusorians, 



329- 

 Medium, influence of, ii. 267. 

 Mendel's Law, ii. 57. 

 Merogony, fertilization of non-nucleated 



pieces of ovum, 343. 



II. 



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