INDEX 



443 



Nemec, 149, 152, 213, 259 

 Neotiella (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, 364 

 Newman and Patterson, 357 

 Newport, 15 

 Nichols, 255 

 Nichols, G. E., 295 

 Nicotiana (tobacco), 187 

 Nidularia (fungus), 224 

 Nienburg, 291 

 Nissl substance, 30 

 Noll, 193, 355 



Non-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 ff. 



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, 63> 149, 154 



in protista, 66 



relation to metabolism, 69 



sphere of influence, 62 



structure, 63, 160 



trophic nucleus, 84 



Nucleus, vesicular, 69 

 Numerical reduction, 229, 249 

 Nussbaum, 402 

 Nymphcea (water lily), 115, 116 



O 



Octads, 249 

 (Edamatin, 64 



(Edogonium (green alga), blepharoplast, 

 85 



fertilization, 14, 288 



reduction, 222 

 (Elkers, 222 

 (Enothera, cytology of mutants, 344 ff. 



fragmentation of chromosomes, 165 



synapsis in hybrids, 252 

 Ogata, 65 

 Oil, 110, 111, 122, 134, 194 



body, 110, 134 



droplet, division of, 189 



vacuole, 48, 111, 134 

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

 Oliver, 47 



Oniscus (crustacean), 255 

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

 Ontogenesis, 323, 324, 398, 401, 407, 411 

 Ooapogamy, 315 



Oocytes or ovocytes, 220, 233, 274, 275 

 Oogenesis, 221, 274, 276 

 Oogonia or ovogonia, 221 

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

 Oomycetes, 289 

 Open spireme, 238 



Ophryotrocha (annelid worm), 237, 244 

 Orchis (orchid), 104 

 Organic acids, 135 



Organism as a whole, 12, 52, 140, 411 

 Or man, 118 

 Orthogenesis, 404, 410 

 Orthoptera, 386, 393 

 Oryza (rice), 256 



Oscillatoria (blue-green alga), 202, 204 

 Osmosis in mitosis, 184 

 Osmunda (fern), apical cell, 27 



reduction, 234, 236, 239, 240 



sex-determination, 373 

 Osterhout, 70, 248 

 Otidea (fungus), 81, 223 

 Ovarian egg, 221, 274 

 Overton, E., 43, 46, 111, 220 

 Overton, J. B., parthenogenesis, 314, 315 



prochromosomes, 159 



