448 



INDEX 



GALTON, 226, 242 

 Gallon's theory of stirp, 243 

 Galvanotropism, 60 

 Gametes, 174, 194 

 Gasteropoda, 327 

 Gastrula, 210 

 Gemmation, 169 

 Gemmini, 192 

 Gemmules of Darwin, 240 

 Generation, spontaneous, 21 

 Geology, 291 

 Geotropism, 63 

 Germ plasm, 191 



of Nageli, 246 



of Weismann, 248 

 Germinal cells, 171 



differentiation of, from so- 

 matic cells, 119 

 in animals, 191 



disc, 211 

 Gills, 139, 145 

 Glossina, 330, 347 

 Goethe, 272 

 Gonads, 123 

 Gonocytes, 185 

 Graafian follicles, 202 

 Grafting, 406 



in plants, 424 

 Gravity, effect on living tissues, 



63 



Growth, 83 

 Guthrie on grafting, 412 



H 



HABITUATION, 360 



Haeckel, 222 



Haffkine's cobra serum, 385 



Haller, 201 



Hammen, 200 



Haptophores, 367 

 Hare-lip, formation of, 227 

 Harrison on grafting, 422 



on growth of tissue in vitrio, 



312 



Hartsoeker, 202 

 Harvest bug, 337 

 Harvey, William, 199 

 Harvey's law, 28 

 Hearing, development of, 164 

 Heart, batrachian type of, 142 



development of, 138, 225 

 Heat. See Temperature. 



stimulation, response to, 37 

 Heliotropism, 54 

 Helotism, 317 

 Hemoglobin, 136 

 Hemolysins, 305 

 Hemolytic serum, 365 

 Hemophilia, transmission of, 253 

 Henking on sex determination, 



232 



Hensen on sex determination, 230 

 Heredity, 237 ^/ 



Hermaphroditism, 177, 188 */ 



Herpetomonas, 324 

 Hertwig, 49, 53 

 Heterochromosomes, 232 

 Heteromorphosis, 391 

 Heterotype mitosis, 194 

 Heterozygous, 257 

 Histology, 93 

 Holoblastic egg, 204 

 Holophyra, 324 

 Holophytic nutrition, 90 

 Holothurians, effect of gravity 



on, 67 



Holozoic nutrition, 90 

 Homologous twins, 226 

 Homomorphosis, 391 

 Homonculus, 200 

 Homotype mitosis, 192, 194 



