INDEX. 



tory defence of. 164; death-bed 

 of, i; defended, 129; defined, 

 2, 10 ; not synonymous with 

 organic evolution, 2. 3 ; pres- 

 ent standing of, 374; upheld 

 by Lankester, 389 



Davenport, C. B.. discussion of 

 mutations theory, 367 



Death-bed of Darwinism, I 



Death indiscriminate. 80 



Defence of Darwinism, 129 



Degeneration, complete, not ex- 

 plicable by selection, 77, 146; 

 example of progressive, not 

 explicable by natural selection, 

 100 ; explanation of, by pan- 

 mixia, 190 ; Lamarckian ex- 

 planation of, 192; Plate's La- 

 marckian explanation of, 147; 

 Tayler's Darwinian explana- 

 tion of, 147; Weismann's dis- 

 cussion of, 77 



Delage, Y., criticism of Del- 

 bceuf's law, 72 ; criticism of 

 organic selection, 210; esti- 

 mate of selection, 93, 390 ; ma- 

 chine theory of protoplasm, 

 225 ; theory of general varia- 

 tion, 289 



Delbceuf's law, Delage's criti- 

 cism of, 72 



Dennert, E., attack on Darwin- 

 ism, 7 



Descent, Darwinian explanation 

 of, 13; evidences for, 17; evi- 

 dences of, references, 23 ; his- 

 tory of theory of, references, 

 22 ; natural selection the final 

 arbiter in, 374; relations to 

 theology, references, 23 ; theo- 

 ries of, 187; theory of, de- 

 fined, ii ; theory of, dis- 

 tinguished from theory of nat- 

 ural selection, 17; theory_ of, 

 history, of. n ; theory, given 

 validity by Darwin, 12 ; theory, 

 relation to pedagogy, 21 ; 

 theory, relation to sociology, 

 21 ; theory, relation to theology 

 and philosophy, 20 



Determinant, 95 



DeVries, H., belief of, that 

 artificial races are not fixed 

 and constant forms, 87 ; dis- 

 cussion of geologic time and 



species-forming, 54 ; discus- 

 sion of species-forming by 

 selection, 389; objection to 

 selection based on linear char- 

 acter of variation, 139; refer- 

 ences to discussions of muta- 

 tions theory by, 362; summing 

 up of discussion of compari- 

 son of natural and artificial 

 selection, 89 ; theory of muta- 

 tions, 337 ; theory of the ulti- 

 mate structure of protoplasm, 

 220 



Dohrn, A., principle of change 

 of function, 168 



Douglass, N. G., observations 

 on wall lizard, 123 



Diirigen, observations on liz- 

 ards, 123 



Eimer, Th., theory of ortho- 

 genesis, 282, 321 



Emery, C., theory of primary 

 variations, 332 ; theory of the 

 origin of secondary sexual 

 characters, 353; theory to ex- 

 plain secondary sexual differ- 

 ences, 124 



Evolution, defined, 10: organic, 

 not synonymous with Darwin- 

 ism, 2, 3 ; Osborn's champion- 

 ship of the unknown factors 

 of, 391 ; the unknown factors 



of, 377 

 Evolution study, prime needs of, 



3/8 



Fischer, experiments with but- 

 terflies, 296 



Fleischmann, A., opposed to evo- 

 lution, 8 



Friedlander, discussion of adap- 

 tation, 392 



Friedman, H., theory of the con- 

 vergence of organisms, 8 



Galton, F., belief in hetero- 

 genesis, 332; discussion of 

 specific stability, 359; discus- 

 sion of variation according to 

 the law of chance, 61 ; law of 

 regression, 71 ; statement of 

 the law of regression, 97 _ 



Germ-cells, theories of ultimate 

 composition of, 268 



