398 



INDEX 



Boveri, fertilization of non-nitcleated 

 pieces of ovixm with nucleus of another 

 species, 341. 



Brandes, on the extinction of Macludrodus 

 sjieeies and the giant armadillos, ii. 

 358, 359 ; on the supposed transforma- 

 tion of the stomach in Inrds as a result 

 of nutrition, 267. 



Brown-Sequard, artificial epilepsy in 

 guinea-pigs, ii. 67. 



Briicke, Ernst, organization of the living 

 substance, 368. 



Budding and division, ii. i. 



Biitschli, theories of amphimixis, 330 ; 

 discovery of the spindle-figure in nuclear 

 division, 289. 



Burdach, inhei'itance of mutilations, ii. 



65. 



Buttel-Reepen, Hugo von, on fertilization 

 in the bee ovum, 306. 



Butterflies, their enemies, 98 ; aggressive 

 colourings, 68, 70 ; aberrations due to 

 cold, ii. 274 ; transmissibility of these, 

 275 ; endemic species, 285 ; polar and 

 Alpine species, 285 ; species of the 

 Malay region, 291. 



Butterflies, protective .coloration in, 74. 



Cnenogenesis. ii. 173. 

 Calkins, conjugation of infusorians, 329. 

 Caterpillars, protective coloration in, 67. 

 Catocala, adajitive coloration in the various 



species, ii. 310. 

 Cell-division, integral and differential, 



374 ; differential in Ctenophoi'es, 408 ; 



pi'oofs of differential, 377. 

 Centrospheres, 289, 309. 

 Ceratium, ii. 326. 

 Chance, elimination sometimes due to, 



44» 47- 



Characters, purely morphological, ii. 133. 



Child, determination of, at fertilization, 

 ii. 46. 



Chromatin, the hereditary substance, 287 ; 

 grounds for the belief, 337-43. 



Chromosomes, their occurrence in uni- 

 cellulars, ii. 217 ; simple and plurivalent 

 ( = idants% 349, 350; individuality of, 

 349 ; number of, in different species, 

 291 ; indications of complexity of their 

 structure, 292 ; reasons for their exis- 

 tence. 303. 



Chun, segmentation of the ovum in 

 Ctenophores, 408 ; KergueleJi cabbage 

 and rabbits, ii. 362 ; deep-sea investiga- 

 tion, ii. 322. 



Cii'rhipeds, ii. 241. 



Climate, influence of, in causing variation, 

 ii. 269. 



Climatic varieties, ii. 269, 272. 



Coadaptation, ii. 80; in crustaceans, ii. 

 81 ; in the markings of butterflies, ii. 

 87 ; in the forelegs of the mole-cricket, 

 ii. 86. 



Cold aberrations in butterflies, ti-aus- 

 missibility of, ii. 275. 



Coloi-ation, animal, its biological import, 

 58; sympathetic in butterflies, 74; in 

 moths, 76 ; of animals in green sur- 

 rounding, 64 ; of eggs. 60; of nocturnal 

 animals, of polar animals, 64 ; water 

 animals, 63. 



Coloration, shunting backwards of, in the 

 ontogeny. 73. 



Ci)lour-adaptation, double, 64, 73; colour 

 change in fishes, amphibians, rejitiles 

 and Cephalopoda, ii. 278. 



Combinations of determinants, ii. 40. 



Conjugation, in Protozoa, 317 ; in Para- 

 maxium, 319. 



Conklin, on the behaviour of the centro- 

 sY>here in the ovum of Crepiduhi, 309, 

 ii. 41. 



Connective ti.ssue of vertebrates, 386. 



Constancy and variability, periods of, 

 ii. 294, 295 ; degree of constancy of 

 a chai-acter increases with its age, ii. 

 200. 



Convergence, ii. 323. 



Cope, supijosed palaeontological jiroofs for 

 the Lamarckian jirinciple, ii. 77. 



Copernicus, 13. 



Copulation oi Coccidimn 2>nprium, ii. 217. 



Corj-elation of the parts of the body, 41 ; 

 of determinants of the germ-plasm, ii. 



J53- 

 Correus on Xenia, ii. 59. 

 Corsica, endemic butterflies of, ii. 285. 

 Crampton, segmentation in a mai'ine 



snail, Ilyanassa, 409. 

 Crystal animals, sympathetic colouring, 63. 

 Cultivated plants, asexual reproduction 



in, ii. 261. 

 Cuvier, 16 ; his dispute with St.-Hilaire, 



24. 



Dahl, the ants of the Bismarck Archi- 

 pelago, ii. loi. 

 Danaides, immune butterflies, 94. 

 IJanais erippus and Limenitis archippus (mimi- 



cit\ lis- 114- 



Darwin, Charles, first appearance of TJie 

 Origin. 0/ Species, 28 ; story of his life, 29. 



Darwin, Erasmiis, tiieory of evolution, 17. 



Darwin and Niigeli, ii. 322. 



Dai-wiuian theory, dependence of the 

 frequency of species on enemies, 47 ; 

 on external circumstances, 45 ; cor- 

 relation of parts, 41 ; races of pigeons, 

 34 ; of domesticated animals, 31 ; geo- 

 metrical ratio of increase, 46 ; struggle 

 fo)" existence, 47 ; struggle between 

 individuals of the same species, 52 ; 

 artificial selection. 39 ; natin-al selection, 

 42 ; affects all parts and stages, 54 : 

 variation, 43 ; summary, 55 ; origin of 

 flowers, 182 ; jjangenesis, ii. 62. 



Death, natural, 260. 



Degeneration of a typical organ not an 

 ontogenetic but a phylogenetic process, 

 ii. 91 ; of disused parts, ii. 116. 



Delage, the germ-substance, 401 ; 'a port- 



