v. Sachs, J., 145, 154 ff., 159, 161, 184
Sex, of parthenogenetic frogs, 125; of twins, 211
Sex determination, cytological basis of, 198 ff.; physiological basis of, 214 ff.
Species, chemical basis of, 40 ff.; specificity of, 41 ff.; incompatibility of, not closely related, 44 ff.
Species specificity, determined by proteins, 63, 68, 348; apparently not by nucleins, 69
Specificity, of grafted tissues, 47; of spermatozoa, 48; of blood sera, 53 ff.; in fertilization, 71 ff.; of activation of sperm by eggs, 80 ff.
Spermatozoa, fertilization of eggs by, 72 ff.; activation by eggs of, 80 ff.; agglutination of, 82 ff.; cluster formation of, 83; chemotropism of, 92 ff.; cultivating of, 126 ff.; chromosomes of, 198 ff.
Streaming as means of egg differentiation, 145, 146
_Strongylocentrotus franciscanus_, 50, 52, 75, 81 ff., 103, 247
_Strongylocentrotus purpuratus_, 52, 73 ff., 81 ff., 94, 98 ff., 103, 108, 109, 111 ff., 137, 191, 246 ff., 293 ff., 364; larvæ of, 49 ff.
Synthesis of living matter, by micro-organisms, 15 ff.; by enzymes, 24 ff.
Temperature, effect on heliotropism, 280; upper limit for organisms, 287 ff.; effect on life, 288 ff.; on butterflies, 303 ff.; adaptation to, 334 ff.
Temperature coefficient, 290 ff., 305; for enzyme, 291; for development, 292 ff.; for oxidations, 295; and fluctuating variation, 296 ff.; for heart-beat, 300 ff.; for duration of life, 366
Thyroid inducing metamorphosis in tadpoles, 155, 156
Tissues, transplantation of, 30 ff., 44 ff.; cultivation of, 31 ff.; specificity of, 44 ff.
Transplantation, of tissues, 30 ff., 44 ff.; of cancers, 45; of anlagen, 148; of eye of salamander, 157; of testes, 226; of ovaries, 227
Tropisms, 11 ff., 92 ff., 147, 178, 187, 253 ff.; and instincts, 253; theory of, 257 ff.
Tropisms, in embryonic development, 147; of cave animals, 324
_Tubularia mesembryanthemum_, 167, 169, 192
Wasps, polymorphism in, 222-224; sex determination, 255 ff.
Wasteneys, H., 29, 82, 87, 112, 113, 117, 191, 277, 293, 295, 335, 364
=1.=--=The Study of Man.= By Professor A. C. HADDON, M.A., D.Sc., M.R.I.A. Fully illustrated. 8^o.
"A timely and useful volume.... The author wields a pleasing pen and knows how to make the subject attractive.... The work is calculated to spread among its readers an attraction to the science of anthropology. The author's observations are exceedingly genuine and his descriptions are vivid."--_London Athenæum._