INDEX 



449 



Homozygous, 257 



Hooker, 93 



Hook-worm, 326, 340 



Host, condition of receptivity, 



353 

 of parasite, 317 



Hume, David, on evolution, 271 

 j/ Huxley on classification, 296 



Huxley's criteria of life, 31 



Hyaloplasm, 95 



Hybridization, blood-relation- 

 ship and, 311 



Hybrids, Mendel's study of, 255 



Hydra, digestive apparatus of, 



124 



grafting in, 410 

 mechanical stimulation of, 45 

 nettling cells of, 126 

 regeneration in, 389 

 reproduction in, 182 

 structure of, 120 



Hydrophobia, Pasteur's treat- 

 ment of, 382 



Hydrotropism, 50 



Hydrozoa, 325 



Hymenolepis nana, 325 



Hymenoptera, 332 



Hyperchromatosis, 102 



Hypersensitivity, 363 



Hypoblast, 210 



Hypoderma, 330 



Hypopolar field, 105 



I 



ID, 249 



Idants, 249 



Idioplasm, accessory, 251 



blastogenic, 251 



of Nageli, 246 

 Immune body, 365 

 Immunity, 350 



Immunity, acquired, 359 



definition of, 353 



general considerations of, 354 



natural, 356 



phenomena of, 360 

 Immunization, 362 

 Infection, 350 



cardinal conditions of, 352 

 Infectious disease, immunity to, 



375 



Infusoria, parasitism of, 324 

 Innervation, development of, 



149 

 Insects, effect of light on, 59 



fertilization of plants by, 188 

 Intestinal worms, dissemination 



of, 339 



Irritability, 34 

 Itch, 337 



mite, 319 



JAGER on inheritance, 247 

 Jelly fishes, circulation in, 132 

 Jenner and vaccination, 378 

 Jennings, 74 

 Joest on grafting, 408 



K 



KANT and Laplace, nebular hy- 

 pothesis, 18 



Karyokinesis, 102 



Karyolysis, 99 



Karyomitome, 98 



Karyoplasm, 98 



Karyorrhexis, 99 



Katabolism, 83 



Kidney, development of, 148 

 regeneration of, 402 

 transplantation of, 411, 416, 

 417 



