398 



Index 



tionist psychology, ii, 229 



Herbst, C., i, 344 



"Hereditary substance," contrary 

 to facts in hydromedusae, i, 68 



Heredity, and elementalistic phil- 

 osophy, i, 20; nature of, 305; 

 stronghold of biological elemen- 

 talism, 305; effort to restrict to 

 sexual propagation, 308; denned 

 by E. G. Conklin, 308; com- 

 plex of causes, 313; definition, 

 314; chromatin in, 320, 321; and 

 sex, 348; cytological basis of, 

 349; spermatozoon's tail mani- 

 festation of, ii, 3; mitochondrial 

 theory of, 33; and sponge spic- 

 ules, 53; summary of informa- 

 tion on physical basis of, 64; 

 narrowing definition of, 85 



Herlitzka, Amedeo, i, 205 



Hertwig, O., theory of Biogene- 

 sis of, i, 27; experiments on 

 half embryos, 200; on centro- 

 some, 332 



Hertwig, R., on cell-theory as ap- 

 plied to protozoa, i, 288; on 

 experimental determination of 

 sex, ii, 76 



Higher Usefulness of Science, ii, 

 337 



His, Wilhelm, i, 208 



Histogenesis, and the mechanism 

 of heredity, i, 325, and ii, 32; 

 and species characters in adults, 

 43 



Hobbes, Thomas, and sensational- 

 ism in philosophy, ii, 219 



Holmes, S. J., an organism as 

 symbiotic community, i, 183; on 

 brainless frogs, ii, 195; on ac- 

 tivities of Amphithoe, 248; on 

 behavior of ants, 257 



Hooker, D., i, 339 



Hopkins, F. G., on the cell as a 

 chemical laboratory, i, 82; on 

 the physical chemistry of the 

 cell, 114 et seq.; on the cell 

 constituents essential to the cell 

 as a system of phases, 192; ver- 

 sus particular types of mole- 

 cules as an explanation of life, 

 194 



Honey-bee, eggs and chromosomes 

 of, i, 352; storing habits of, ii, 

 268 



Hormones, importance of, to or- 

 ganismal conception, i, 23; na- 

 ture of action of, ii, 121; rela- 

 tion to nerve action, 128; sup- 

 posed identification with "form- 

 ative stuffs," 142; integrative 

 office of, compared with that of 

 nervous system, 162 



Hudson, W! H., ii, 261 



Human being in one-celled stage, 

 i, 217 



Hume, David, ii, 298 



Hunter ciliates, i, 235 



Huntsman, A. G., ii, 44 



Huxley, Julian S., ii, 263 



Huxley, T. H., on the physical 

 basis of life, i, 121 ; on the 

 cell-theory, 288, 296; on innate 

 ideas as conceived by Descartes, 

 ii, 298; against materialism, 302 



Hydroids, germ-cells in, 60; sepa- 

 rated blastomeres in eggs of, 

 204; graded growth series in, ii, 

 97 



Hypophysis, ii, 124; alliance with 

 thyroid and adrenals, 127 



Hypopituitarism, ii, 113 



Hypothesis, ii, 282; of conscious- 

 ness, 286; "working," 291 



Idea, central of this book, i, 24 

 Ideas, atomistic and association 

 of, ii, 229; "relations of," in 

 Hume's system, 299; innate, 301 

 "Identical stuffs," i, 123 

 Impertinence, scientific, ii, 247 

 Individual, man, i, 31 ; tree, 31 ; ex- 

 altation of, 196; normal, ii, 205 

 Individuality, in the living world, 

 i, 30; Huxleyan, 43; of chromo- 

 somes, 85; of organism, ii, 111 

 Inheritance, i, 312; nuclear theory, 

 and cytoplasmic localization, ii, 

 22; of acquired characters, 24; 

 material imitator rather than 

 determiner, 66; probability that 

 substance becomes such in each 

 ontogeny, 73 

 Inhibition of reflexes, ii, 176 



