466 



INDEX, 



on polar bodies, 350, 362 ; on 

 process of fertilization, 366. 



Pormica sanguinea and fusca, 

 length of life of, 51, 



Fox, length of life of, 14. 



Galls, 310, 414. 



Galton, on transfusion in Rabbits, 

 169 ; on heredity, 174 ; on twins, 



392. 

 Gannets, numbers collected each 



year, 38. 

 Geotropism, 410. 

 Germ, meaning of, 149. 

 Germ-cells, 73; predisposition of 



the, 85, 104 ; fluctuations in, 104 ; 



not continuous. 175. 

 Germ-plasm, 80, 194, 273, 351, 368, 



381, 415 ; continuit}' of, 105, 170, 



175» 187; definition of, 176. 

 Goliathus cacicus, length of life 



of imago of, 48. 

 Goose, length of life of the wild, 



37- 

 Gfitte, on necessity of death, 112 ; 



on rejuvenescence, 115, 125; on 



death of Metazoa, 126. 

 Gregarines, 150, 151, 206. 

 Grobben, on polar bodies of Ceto- 



chilus, 222. 

 Gruber, on regeneration amongst 



Infusoria, 188. 

 Gryllotalpa, duration of life of, 39. 

 Gryllus campestris. duration of 



life of, 39. 



Hackel, on reproduction, 72; on 

 Perigenesis of the Plastidule, 

 168 ; on amphigonic reproduc- 

 tion, 279. 



Hare, length of life of, 14. 



Hartlaub, on origin of germ-cells 

 in Obelia, 212. 



Hawk-moths, length of life of 

 imago of, 17. 



Helicidae, length of life of, 56, 57, 



58. 



Heliotropism, 412. 



Hemiptera, length of life of, 41. 



Hens, length of life of, 36. 



Hensen, on sexual reproduction, 

 289, 293 ; on difterence between 

 germ-plasm and histogenctic 



nucleoplasm, 353 ; on heredity, 

 381. 



Heredity, 29, 71, 390 ; defined, 72 ; 

 dependent on continuity of germ- 

 plasm, 105, 171 ; dependent on 

 coalescence of nuclei, 181. 



Hertwig, O., on fusion of nuclei, 

 177 ; on the influence of gravity 

 in segmentation, 180, 192 ; on 

 polar bodies, 350, 362 ; on pro- 

 cess of fertilization, 366. 



Hesperornis, rudimentary wing of, 

 89. 



Heterogeny, 334. 



Heterogynis, 44. 



Heteroplastides, 131, 132, 135, 

 140. 145, 155, 208. 



Hildebraiidt, on duration of life in 

 plants, 33, 66 ; on cross-fertiliza- 

 tion, 318. 



His, on heredity, 168, 402, 425 ; 

 on the transmission of mutila- 

 tions, 435. 



Hoek, on polar bodies in Balanus, 

 222. 



Hoffman, on transmission of ac- 

 quired characters, 420. 



Homoplastides, 123, 140, 148, 

 206. 



Horse, length of life of, 6, 7 ; in 

 the Falkland Islands, 100. 



Humboldt's Atur Parrot. 12. 



Hunter, John, experiments in 

 Anabiosis, 25. 



Hyalineae, length of life of, 57. 



Hybrids, 339. 



Hydroids, origin of germ-cells of, 

 202, 209, 210, 215. 



Hyla, 309, 406. 



Hymenoptera, length of life of, 49. 



Hypermetropia, 90. 



Ichneumons, length of larval life 

 of, 15 ; length of life of imago 

 of, 49. 



Ichthyophthirius mviltifiliis, fis- 

 sion of, 150, 151. 



Idioplasm, 177, 187, 195, 351 ; not 

 identical with nucleoplasm, 183; 

 relation to chromatin, 221 ; two 

 kinds of, 250; various combina- 

 tions of, 283. 



Imago, length of life of, 16. 



