466 



INDEX 



Holoblastic egg, 216 



Holophyra, 338 



Holophytic nutrition, 90 



Holothurians, effect of gravity 

 on, 67 



Holozoic nutrition, 90 



Homologous twins, 238 



Homomorphosis, 405 



Homonculus, 212 



Homotype mitosis, 205, 206 



Homozygous, 269 



Hooker, 93 



Hook-worm, 340, 354 



Host, condition of receptivity, 



367 



definitive, 333 

 intermediate, 333 

 of parasite, 331 



Hume, David, on evolution, 283 



Huxley on classification, 308 



Huxley's criteria of life, 31 



Hyaloplasm, 95 



Hyami, 457 



Hybridization, blood-relation- 

 ship and, 325 



Hybrids, Mendel's study of, 267 



Hydra, digestive apparatus of, 



124 



grafting in, 424 

 mechanical stimulation of, 45 

 nettling cells of, 126 

 regeneration in, 403 

 reproduction in, 194 

 structure of, 120 



Hydrophobia, Pasteur's treat- 

 ment of, 396 



Hydrotropism, 50 



Hydrozoa, 339 



Hymenolepis nana, 339 



Hymenoptera, 346 



Hyperchromatosis, 102 



Hypersensitivity, 377 



Hypoblast, 222 



Hypoderma, 344 



Hypopolar field, 105 



ID, 261 



Idants, 261 



Idioplasm, accessory, 263 



blastogenic, 263 



of Nageli, 258 



Immune body, 379 

 Immunity, 364 



acquired, 373 



definition of, 367 



general considerations of, 368 



natural, 370 

 . phenomena of, 374 

 Immunization, 376 

 Importance of brain, 165-168 

 Infection, 364 



cardinal conditions of, 366 

 Infectious disease, immunity to, 



389 



Infusoria, parasitism of, 338 

 Ingebrigsten, 457, 459 

 Innervation, development of, 148 

 Insects, effect of light on, 59 



fertilization of plants by, 200 

 Instinctive action, 170, 171 

 Instincts, 168 



primary, 170 



secondary, 170 

 Intelligence, 171 



lapsed, 170 



Intermediate host, 333 

 Interoceptors, 152 

 Intestinal worms,' dissemination 



of, 353 

 In vitro, cultivation of tissues, 



456 



Irritability, 34 



Isohemagglutinins in blood re- 

 lationship, 323 



Isohemolysins in blood relation- 

 ship, 323 

 Itch, 351 



mite, 333 



JAGER on inheritance, 259 

 James on instincts, 169, 170 

 Jelly fishes, circulation in, 131 

 Jenner and vaccination, 392 

 Jennings, 74 



on instincts, 167, 169 

 Joest on grafting, 422 

 Jolly, 457 



KANT and Laplace, nebular hy- 

 pothesis, 18 

 Karstner, 323 



