48o 



INDEX OF SUBJECTS 



Fishes, pigment-cells, 102; periblast-nuclei, 

 117; spermatozoa, 137; young ova, 116; 

 single blastomeres, 410. 



Flagellates, diffused nuclei, 39. 



Follicle, of the egg, 150. 



Forficida, nurse-cells, 151. 



Fragmentation, 64. 



Friiillaria, spireme, 112; fertilization, 

 219. 



Frog, tetrads, 259; egg-axis, 378; first cleav- 

 age-plane, 380; Roux's puncture experi- 

 ment, 399; post-generation, 409; pressure- 

 experiments, 410; effect of gravity on the 

 egg, 422; development of single blasto- 

 meres, 399, 408, 422; double embryos, 

 422. 



Fucus, 143, 217, 221. 



Ganglion-cell, 48; centrosome in, 51, 314. 



Gemmae, 291. 



Gemmules, 12, 291. 



Genoblasts, 243. 



Geophilus, deutoplasm, 154, 158; yolk-nu- 

 cleus, 156. 



Germ, 7, 396. 



Germ-cells, general, 8, 9; detailed account, 

 122; of plants, 133, 142; origin, 144; 

 growth and differentiation, 150; union, 

 196; results of union, 200 ; maturation, 

 233; early history of nuclei, 272. 



Germinal localization, theory of, 397. 



Germinal spot, 124. 



Germinal vesicle, 124, 125; early history, 

 273; movements, 349; position, 387. 



Germ-nuclei, of the ovum, 125; of the 

 spermatozoon, 135; of plants, 216; stain- 

 ing-reactions, 175; in fertilization, 182, 

 188; equivalence, 182, 205; paths, 202; 

 riiovements, 204; union, 204; indepen- 

 dence, 204, 299; in Infusoria, 224; early 

 history, 272. 



Giant-cells, 31; microcentrum, 314. 



Gingko, 173. 



Globulin, 331, 333. 



Granules (see Microsomes), of Altmann, 290; 

 nuclear, 37, 303; chromophilic, 23, 48; 

 in general, 289. 



Gravity, effect on the egg, 131, 422. 



Gregarines, mitosis, 89; polar body, 278. 



Ground-substance, of protoplasm, 23; of 

 nucleus, 36. 



Growth, and cell-division, 58, 388. 



Gryllotalpa, reduction, 249. 



Guinea-pig, spermatogenesis, 170; matura- 

 tion, 277. 



Heliozoa, 92, 103. 



Helix, 163, 168, 259. 



Hevierocallis, 306. 



Heterocope, tetrads, 250. 



Heterokinesis, 406. 



Histon, 334, 336. 



Homceokinesis, 406. 



Hydrophilus, orientation of egg, 384. 



Id, in reduction, 245; in inheritance, 406. 



Idant, 245. 



Idioblast, 291, 



Idioplasm, theory of, 401 ; as chromatin, 

 403; action of, 406, 414, 431, 432. 



Idiosome, 291. 



Idiozome, 163, 165, 324. 



Ilyanassa, partial development, 419. 



Infusoria, nuclei, 31, 224; mitosis, 90 ; con- 

 jugation, 223; reduction, 277. 



Inheritance, of acquired characters, 12, 



433 ; Weismann's theory, 12; through 



the nucleus, 351-354 ; and metabolism, 



430- 

 Inotagmata, 291. 



Insect-eggs, 132, 386. 



Interzonal fibres, 70. 



Iris, 267. 



Isopods, metamerism, 390. 



Isotropy, of the egg, 384, 417. 



Karyokinesis (see Mitosis), 64. 

 Karyokinetic figure (see Mitotic Figure), 



69. 

 Karyolymph, 36. 

 Karyoplasm, 21. 

 Karyosome, 34. 

 Kinoplasm (archoplasm), 54, 77, 82, 173, 



322. 



Lanthanin, 38. 



Lepidoptera, sex, 144. 



Leucocytes, structure, 102 ; division, 117; 

 centrosome, 309; attraction-sphere, 326. 



Leucoplasts, of plant-ovum, 133. 



Z///MW, mitosis, 83; spireme, 112; fertiliza- 

 tion, 219; reduction, 265-271. 



Umax, germ-nuclei, 204. 



Limulus, 158. 



Linin, 32; relations to cytoreticulum and 

 chromatin, 302. 



liparis, 281. 



locusta, orientation of egg, 384. 



Loligo, spiiuUe, 81; cleavage, 381. 



Lumbricus, yolk-nucleus, 157; reduction, 

 257- 



