INDEX. 



Grinnell, Jos., study of geo- 

 graphic differences in the 

 chickadee, 225 



Gulick, J. T., studies of Ha- 

 waiian land snails, 251 ; theo- 

 ries of isolation influence, 249 



Haacke, W., discussion of in- 

 heritance of acquired char- 

 acters, 270; summary of Wag- 

 ner's theory, 253 



Haeckel, E., champion of evolu- 

 tion, 130 



Hatschek, B., theory of the 

 ultimate structure of proto- 

 plasm, 222 



Henslow, G., experiment of sow- 

 ing of wheat, 80 ; references to 

 books antagonistic to selection, 



67 



Heterogenesis, 326; belief in, of 

 Dall, 330; Emery's theory of, 

 332; Korschinsky's theory of, 

 333; proposed by von K61- 

 liker, 330 



Hutton, F. W., argument for 

 dualism, 23 



Hyatt, A., experiments on 

 Planorbis, 295 



Inheritance of acquired char- 

 acters, 263; Brown-Sequard's 

 experiments, 290 ; Cunning- 

 ham's experiments, 296; diffi- 

 culties in accepting, 267 ; ex- 

 periments with silkworms, 

 298; Fischer's experiments, 

 296; Haacke's discussion of, 

 270; Hyatt's experiments, 295; 

 logical proof of, 382; Mont- 

 gomery's explanation of, 306; 

 references to discussions of, 

 305 



Insects, parthenogenetical varia- 

 tion in, 58; variation in, 62 



Interbreeding, swamping favour- 

 able variations, 44 



Intra-selection, Roux's theory of, 

 201 ; Plate's criticism of 

 Roux's theory of, 203 



Isolation, biologic, 243 ; biologic, 

 example of, 243; geographic, 

 studied among past animals, 

 241 ; defined, 234 ; importance 

 of, in species-forming, 232; 



not an all-sufficient agent of 

 species-forming, 242 ; physio- 

 logical, 245; references to dis- 

 cussions of, 253, 261 ; sexual, 

 245; theories, 232; various, 

 means of effecting, 234 



Jaeckel, theory of metakinesis r 



289 

 Johannsen, W., experiments. 



with beans bred in pure lines, 



72 

 Jordan, Karl, criticism of Ver- 



non's theory of reproductive 



divergence, 249 ; on mechanical 



selection, 246 

 Jordan, D. S., on geographic 



isolation, 237 



Kallinia, case of, explained by 

 Plate, 175 ; over-specialisation 

 of, 53 



Klebs, G., experiments on plants^ 

 392 



Korschinsky, H., radical anti- 

 selection position of, 91 ; 

 theory of heterogenesis, 333 



Kramer, P., classification of sec- 

 ondary sexual characters, 107 



Lamarck, references to his life 

 and writings, 290 



Lamarckism, 263 ; Burbank's be- 

 lief in, 272 ; favoured by Red- 

 field, 305; Plate's discussion 

 of, 273; unable to explain all 

 adaptations, 272; Weismann's. 

 attack on, 266 



Lankester, R., answer to objec- 

 tion to selection, based on in- 

 sufficient time, 55; upholding 

 of Darwinism, 389 



Law, Delbceufs, Delage's criti- 

 cisms of, 72 ; of chance, varia- 

 tion according to, 32, 59; of 

 regression, Galton's, 71 ; of 

 regression, statement of Gal- 

 ton, 97 



Le Dantec, F., chemical theory 

 of protoplasm, 225 



Lizards, experiments on, 123 



Loeb, J., attitude toward the 

 problem of species-forming,. 

 393 



