398 



INDEX 



Boveri, fertilization of non-nucleated 

 pieces of ovum with nucleus of another 

 species, 341. 



Brandos, on the extinction of Machairodus 

 species and the giant armadillos, ii. 

 358, 359 ; on the supposed transforma- 

 tion of the stomach in birds as a result 

 of nuti'ition, 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 sj)indle-figure in nuclear 

 division, 289. 



Burdacb, inheritance of mutilations, ii. 



65. 

 Buttel-Eeepen, 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, jwotective coloration in, 74. 



Caenogenesis. ii. 173. 



Calkins, conjugation of infnsorians, 329. 

 Caterpillars, protective coloration in, 67. 

 Cafoccda, adaptive coloration in the various 



species, ii. 310. 

 Cell-division, integral and differential, 



374 ; differential in Ctenophores, 408 ; 



proofs 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 comi^lexity of their 

 structure, 292 ; reasons for their exis- 

 tence, 303. 



Chun, segmentation of the ovum in 

 Ctenophores, 408 ; Kergueleii cabbage 

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

 tion, ii. 322. 



Cirrhipeds, 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, trans- 

 missibility of, ii. 275. 



Coloration, 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 jjolar animals, 64 ; water 

 animals, 63. 



Coloration, shunting backwards of, in tbe 

 ontogeny, 73. 



Colour-adaptation, double, 64, 73; colour 

 change in fishes, amphibians, reptiles 

 and Cephalopoda, ii. 278. 



Combinations of determinants, ii. 40. 



Conjugation, in Protozoa, 317 ; in Para- 

 macium, 319. 



Conklin, on the behaviour of the centro- 

 sphere in the ovum of CrejJidida, 309, 

 ii. 41. 



Connective tissue of vertebrates, 386. 



Constancy and variability, periods of, 

 ii. 294. 295 ; degree of constancy of 

 a character increases with its age, ii. 

 200. 



Convergence, ii. 323. 



Cope, supposed palaeontological proofs for 

 the Lamarckian principle, ii. 77. 



Copernicus, 13. 



Copulation of Coccidium proprinm, ii. 217. 



Correlation of tbe parts of the body. 41 ; 

 of determinants of the germ-plasm, ii. 



153- 

 Correns on Xenia, ii. 59. 



Corsica, endemic butterflies of, ii. 285. 



Crampton, segmentation in a marine 



snail, Ilyanassa, 409. 

 Ciystal 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. 10 1. 



Danaides, immune butterflies, 94. 



Danais etippus and Lbnenitis archippus (mimi- 

 cry), 113. 114. 



Darwin, Charles, first appearance of Tim 

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



Darwin, Erasmus, theory of evolution, 17. 



Darwin and Nageli. ii. 322. 



Darwinian 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 

 for existence, 47 ; struggle between 

 individuals of the same species, 52 ; 

 artificial selection, 39 ; natural selection, 

 42 ; affects all parts and stages, 54 ; 

 variation, 43 ; summary. 55 ; origin of 

 flowers, 182 : pangenesis, ii. 62. 



Death, natural, 260. 



Degeneration of a typical oi'gan not an 

 ontogenetic but a phylogenetic process, 

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



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



