INDEX 



327 



Heat of organisms, 79. 



Heredity, 214; racial, 216; Gal- 

 ton's law of, 217 ; selection in, 

 220. 



Hermit-crab, 266. 



Heteromorphosis, 190. 



Hologamy, 141. 



Holozoic and holophytic nutrition, 

 58. 



Homology, 46. 



Hookworm, 286. 



Hormone, 89. 



Horse, evolution of, 309. 



Huxley, T. H. (quoted), 318. 



Hydra, 43; budding, 138; re- 

 generation, 186. 



Hydroid, colonial, 172, 



Hydrophytes, 275. 



Hypertrophy, compensatory, 253. 



Immunity, 255. 



Index of variability, 203. 



Ingestion, 29. 



Inheritance, 215; ancestral, 217; 

 Mendelian, 223 ; sex-limited, 

 233 ; of disease, 236 ; of defects, 

 239. 



Insects, parasitism in, 287. 



Ions, 10; ion-proteins, 11. 



Irritability, 30, 244. 



Isogamy, 142. 



Johanssen, 221. 



Karyogamy, 142, 152. 

 Katabolism, 57. 

 Katydid, 268. 

 Kidney, 121. 



Lamarck's theory of evolution, 259, 



317 ; critique, 320. 

 Lantern fish, 81. 

 Leaf, cellular structure, 19. 

 Leucocytes of frog, 27. 

 Lichens, 291. 

 Life and death, 4. 

 LigKt, effect of, on growth, 100 ; 



on response, 245 ; actinic rays, 



101 ; in animals, 80. 

 Linnaeus, 298. 



Linophryne lucifer, 81. 

 Lipas, 83. 



Liverwort, reproduction, 175. 

 Living and non-living, 2. 

 Locomotor organs, 32. 

 Loeb, J., experiments, 170; with 

 Ciona, 40. 



Mean, 203. 



Malarial parasite, 284. 



Mastodon, 311. 



Mastigamceba, 33. 



Maturation, 153. 



Mechanical tissue in plants, 124. 



Mechanism and vitalism, 194. 



Megagamete, 148 ; spore, ger- 

 mination, 179. 



Mendelism, 223 if. 



Meristic variation, 205. 



Mesophytes, 277. 



Metabolism, 57. 



Metamerism, 135. 



Metaplasm, 21. 



Microgamete, 148. 



Microspore, germination, 179. 



Milk, as an emulsion, 13. 



Mimicry, 269. 



Mitosis, 92, 95, 97; abnormal, 88, 

 97. 



Mode, 203. 



Monarch butterfly, 270. 



Morphogenesis, 185 ; theories of, 

 190. 



Morphogenetic response, 256. 



Mosses, reproduction in, 175. 



Mougeotia, 146. 



Movement, 77 ; of plants, 123. 



Muscle cells, 38. 



Muscles in insects, 114. 



Muscular system, 113. 



Mutations, 207. 



Myrianida, fission, 133. 



Nasturtiums, orientation, 249. 

 Natural Selection, 315. 

 Nematoda, 286. 

 Neo- vitalism, 196. 

 Nephridium, 120. 



Nervous system of a caterpillar, 

 108. 



