INDEX 



1 1 3 



Nernee, 149, 152, 213, 259 

 NeoHetta (fungus), 81, 224 

 Nephrodium (fern), apogamy, 313 315 



fertilization, 293 



reduction, 232, 236 



spermatogenesis, 91 



spindle, 176 

 Nereis (annelid worm), 274 277, 280 

 Nerve cells, 29, 30 

 Neuroterus (gall-fly), 319, Mill 

 Newman and Patterson, 357 

 Newport, L5 

 Nichols, 255 

 Nichols, G. E., 295 

 Nicotiana (tobacco), 187 

 Nidularia (fungus), 224 

 Nienburg, 291 

 Nissl substance, 30 

 Noll, 193, 355 



Xon-disjunction, 346, 348, 382, 383 

 Non-factorial theories of heredity and 



development, 411 

 Noren, 294, 295 

 Nothnagel, achromatic figure, 182 



fertilization, 298-301 



reduction, 239, 240 

 Nowikoff, 213 

 Nuclear membrane, 63, 149, 154 



migration, 312 

 Nucleic acid, 40 

 Nuclein, 40, 64 

 Nucleolini, 65 

 Nucleolo-centrosome, 209 

 Nucleolus, 25, 65, 150, 154, 181 



and chromosomes, 209, 210 

 Nucleoplasm, 25 

 Nucleoplasmic ratio, 62 

 Nucleo-proteins, 40 

 Nucleus, division, 143^". 



discovery, 7 



distributed nucleus, 59, 68 



early views on division, 10, 143 



evolution of, 206 



in fertilization, 277 



functions, 69 



in heredity, 16, 324 ff. 



kinetic nucleus, 84 



nuclear membrane, ti.'!. 1 19, 154 



in protista, tit; 



relation to metabolism, *'»'.• 



sphere of influence, 62 



si ructure, 63, 150 



trophic nucleus, s l 



Nucleus^ vesicular, 69 

 Numerical reduction, 229 2 19 

 Nussbaum, t02 

 \ ympkcea water lilj . l 15, 116 



t > 



Octads, 249 

 (Edamatin, 6 1 



(Edogonium (green alga . blepharopla 

 85 



fertilization, 1 1, 288 



reduction, 222 

 (Elkers. 222 

 GEnothera, cytology of mutants, ill jF. 



fragmentation of chromosomes, I 



synapsis in hybrids, 252 

 Ogata, 65 

 Oil, 110, 111, 122, 134, I'M 



body, 110, 134 



droplet, division of. 189 



vacuole, 48, 111, 134 

 Olive, 59, 108, 202. 204, 208, 222 

 Oliver, 17 



Oniscus (crustacean), 255 

 Onoclea (fern), 288, 356, 372, 375 

 Ontogenesis, 323, 324, 398, L01, L07, 111 

 ( >6apogamy, 315 



Oocytes or ovocytes, 220, 233, 274, 275 

 Oogenesis, 221, 271. 275 

 Oogonia or ovogonia, 221 

 Oogonium (of plants), 179, 222. 223, 288 

 Oomycetes, 289 

 Open spireme, 238 



Ophryotrochd (annelid worm . 237, 211 

 Orchis (orchid). 104 

 Organic acids, 135 



Organism as a whole. 12. 52, 1 M), 11 1 

 Orman, 118 

 Orthogenic i- . in 1. U0 

 Orthoptera. 386, 393 

 Oryza (rice), 256 



OsciUatoria (blue-green alga . 202, 204 

 ( temosis in mitosis, I s I 

 Osmunda i fern . apical cell, 27 



reduction, 234, 236, 239, 240 



-c\-(lcterininal ion, 373 



( teterhout, 70, 248 

 Otidea (fungus), Bl, 21 



( >\ -arian egg, 221, 27 1 



Overton, E . 13, W, ill. 220 

 Overton, J. IV. parthenogenesis, 314, 315 

 prochromosomes, 159 



