INDEX or SUBJECTS 



481 



Macrobdella, 305. 



Macrogamete, 226. 



Macromeres, 371. 



Mammals, spermatozoa, 139, 169; young 



ova, 155. 

 Mantle-fibres, 78, 105. 

 Mar sill a, 175. 



Maturation (see Reduction), 234; theoreti- 

 cal significance, 243; of parthenogenetic 

 eggs, 280; nucleus in, 353. 

 Medusze, dwarf embryos, 410. 

 ISIeristem, nuclei of, 340. 

 Metamerism, 390. 

 Metanucleus, 128. 

 Metaphase, 69. 

 Metaplasm, 19. 

 Micellae, 291. 



Microcentrum, 31 1, 315, 324. 

 Microgamete, 226. 

 Micrumeres, 371. 

 Micropyle, 124, 133. 



Microsomes, 23; of the egg-cytoplasm, 131 ; 

 nature of, 2S9, 290, 293; of the astral sys- 

 tems, 318, 326; of the nucleus, 301, 303; 

 relation to centrosome, 315; staining- 

 reactions, 337. 

 Microsphere, 324. 

 Microzyma, 291. 

 Mid-body, 71, 78. 

 Middle-piece, 135, 139; origin, 161, 165- 



170; in fertilization, 187, 212, 

 Mitosis, 64; general outline, 65; modifica- 

 tions of, 77; heterotypical, 86; in unicellu- 

 lar forms, 87; pathological, 88; multipolar, 

 97; mechanism of, 100; physiological sig- 

 nificance, 351; Roux-Weismann concep- 

 tion of, 245, 406. 

 Mitosome, 165. 

 Mitotic figure (see Mitosis, Spindle), 69; 



origin, 72; varieties, 78. 

 Molgida, 158. 



Mouse, fertilization, 185, 193. 

 Aftisca, ovum, 142. 

 Myriapods, spermatozoa, 142; yolk-nucleus, 



156. 

 Myzostoma, fertilization, 196, 208. 



Naias, 266. 



Nebenkern, pancreas-cells, 44; of spermatid, 



163, 165. 

 Nebenkorper, 164, 165. 

 Nectiiriis, pancreas-cells, 44. 

 Nematodes, germ-nuclei, 184. 

 Nereis, asters, 49; perivitelline layer, 131 ; 



ovum, 129; deutoplasm, 131 ; fertilization. 



191 ; attraction-sj^here and centr<». .lue, 

 325; cleavage. 366, 36*); prcssurf-t-Mn ri- 

 ments on, 411. 



Nerve-cell, 48. 



Net-knot, 34. 



i\W//7//<'(/, mitosis, 93; flagclluni, 171 ; con- 

 jugation, 227; sphere, 319. 



Nuclear stains, 335. 



Nuclein, H, 332; staining-reactions, 334; 

 physiological signilicancc, 340. 



Nuclein-bascs, 331. 



Nucleinic acid, T,}f, 332-334; stainmg-rcac- 

 tions, 334 ; ])hysiological signiticance, 



340. 



Nucleo-ali)umin, 331, 334. 



Nucleo-proteid, 331, 334. 



Nucleolus, }^T^\ in mitosis, 67; of the ovum, 

 126; physiological meaning, 128, 



Nucleoplasm, 21. 



Nucleus, general structure and functions, 

 31 ; finer structure, 37; polarity, 36, 294; 

 chemistry, 41; in mitosis, 65; of the 

 ovum, 123; of the spermatozoon, 135, 137; 

 relation to cytoplasm, 302; morpht)|ogital 

 composition, 294; in organic synthesis, 

 340, 430 ; physiolog)', 341; position and 

 movements, 346; in fertilization, 181,352; 

 in maturation, 353; in later tievelopmcnt, 

 425; in metabolism and inheritance, 430: 

 in inheritance and development. 341, 35S, 

 405. 425, 431 ; control of the cell, 426. 

 Nurse-cells, 15 1. 



CEdigoniiim, fertilization, 181; membrane, 



346. 



Onoclea, 175. 



Oocyte, 236, 



Oogenesis, 234, 230. 



Oogonium, 236. 



Otisphere, 133. 



Op/iryotrochn, amitosis, 1 15; nursc-cclls, 

 151; fertilization, iS«), 193; tetrads, 25S. 



((possum, siK-rmalozoa, 142. 



Organization, 289, 2<)l; i>f the nu- 1- 1. ^.^, 

 301; of the egg, 397, 433- 



Origin of species. 3. 



Ch/fiun,i<t, reduction, 275. 



Ovary, 123; of Cauthoiampius, 273. 



(^vuin, in general, 8, 9: detailed an-unt, 

 124; nucleus, 125; cytoplasm, 130; en- 

 velopes, 132; «>f plants. 133; origin and 

 growth, 150; fertilization. 178; effects of 

 spermatozoon upon. 201 ; maturation, 236; 

 parthenogenetic, 280; promorphology, 

 378; bilaterality, 382. 



2 I 



