476 



INDEX 



parts, 107; on gravity producing 

 no effect in the differentiation of 

 the egg into the embryo, 135; 

 experiments on frogs' eggs, 136; 

 on post-generation, 142 

 Ruckert, J., behaviour of chromo- 

 somes during maturation in the 

 ovum of the dog-tish, 50, 71, 

 247 



Salhs, on the formation of callus, 

 133; on the growth of Chara, 

 164; on adventitious buds, 211 



Sagitta, embryogeny of, 185 ; course 

 of the germ-track of, 192 



Salamandra, regeneration of limbs, 



, 99 

 Salpee, budding in, 162; alternation 



of generations in, 180 

 Schreiber, on the regenerative power 



in Triton marjjioratus, 115 

 Seeliger, O., on budding — in Poly- 



zoa, 158; in Clavelina, 160; in 



Salpae, 162; in Pedicellina, 218 

 Self-differentiation of cells, 136 

 Semper, Carl, on the process of 



fission in Ahiis, 147 

 Settegast, on infection of the germ, 



.385 



Siebold, von, on the determination 

 of sex in bees, 356; on hermaph- 

 rodite bees, 361 



Siren lacertina, regenerative power 

 in, 115 



Spallanzani, on the capacity for re- 

 generation in different organs, 

 117; in Triton, 120; in the jaw 

 of Triton, 125 



Spencer, Herbert, ' physiological 

 units,' 51; their relation to Dar- 

 win's ' gemmules,' 6; on heredity, 

 7; on regeneration, 104; regen- 

 eration compared with crystallisa- 

 tion, 128 



Stimuli considered as causing an 

 incitement to growth, 129 



Strasburger, on fertilisation in 

 Phanerogams, 23; on the essen- 

 tial similarity of male and female 

 nuclei, 23; on the dynamical 

 effect of nuclear matter, 45 



Struggle of individual characters, 

 274; of the ids in ontogeny, 260 



Supplementary determinants, 103; 

 their change in the course of 

 phylogeny, 1 12; in processes of 

 regeneration in Hydra, 127; an- 

 timeral, 131 ; the origin of, 149 



Syphilis, the transmission of, 388 



Tardigrada, extent of the heredi- 

 tary parts, 59 

 Telegony or infection of the germ, 



383 



Termites, polymorphism in, 379 



Thuja, dichogeny in, 382 



Transmission (^see Heredity). 



Triton, 1 00; diagram of regenera- 

 tion of fore-limb in, 102, 115; 

 experiment on regeneration of 

 lung in, 117 



Tuberculosis, and infection of the 

 germ, 389 



Tubularia mesembryanthemum, bud- 

 ding in, 216 



Tunicata, budding in, 160 



Twins, 140; identical and dissimi- 

 lar, 254 



Type in a technical sense, 313 



Vanessa, levana and prorsa, 379 



Variation, intercalary remarks on, 

 271; theoretical demonstration 

 of, 410; normal individual varia- 

 tion, 410; cause of hereditary 

 variation, 415; pathological va- 

 riation, 428; summary of the 

 present view with regard to 

 variation, 431 ; variations on a 

 larger scale in plants, 435 



Verworn, M,, view that the heredi- 

 tary substance is also contained 

 in the cell-body, 28 



Vilmorin, on individual potency in 

 plants, 291 



Vines, view that the assumption of 

 a special reproductive substance 

 is unnecessary, 202; on embry- 

 onic substance, 204 



Viola tricolor, reversion to the an- 

 cestral form, 320 



Vochting, H., on 'transplantation 

 in the plant-body,' 129 



