INDEX 



665 



pollen — [contd.) . 



size, 221, 224 



spindle, 532 



sub-haploid, 317 



tube, 542, XIII 



unreduced, i8g et sqq. 

 Polychaeta, 390 

 polyembryony, 447 

 Polygonatum , jo6 

 POLYHAPLOID. see haploid. 

 poly mitosis, 279, 397, 333, X 

 POLYPLOID animals, 66 



Bryophyta, 448 



gland cells, 175 et sqq. 



hybrids, 202 et sqq., 208 et sqq. 



interchange heterozygotes, 156 



meiosis, 119 et sqq. 



resting nuclei, 46 



segregation, 247 



species, 197 

 polyploids, 60, 61, 75 



and apomixis, 468, 46g 



classification of, 183 et sqq. 



failure of pairing, 165 



induction of, 64 



inference of, 229 



origin of, 63, igo, igi, 396, 416 

 et sqq. 



pollen grains of, 195 



secondary, 202, 238 



See also triploid, tetraploid, etc. 

 polysomy, 60, 68 

 POLYTENE, 178 

 Pomoideae, 79, 239 

 population, natural, 299 



in Crepis, 70 



hybridity of, 271 

 Portulaca, 228, 445 

 POSITION EFFECT, 280, 333 

 POST-REDUCTION, see reduction. 

 Potentilla, 454, 465 

 PRECOCITY, of anaphase 

 separation, 115 



of condensation, 308, 364, 562 

 of sex chromosomes, 380, 390 



of metaphase, 413 



of prophase, 309, 398 



theory, see theory, 

 pre-reduction, see reduction. 

 Primula, tetraploids, 2iy 



triploids, 217 

 Primula kewensis, igo, ig3, 248 



differential affinity, 198 



diploid, iy2 



pairing, 184 et sqq. 



Primula kewensis — {contd.). 



secondary segregation, 278 



unbalance, 323, 400 

 Primula malacoides, 125 

 Primula ohconica, 224 

 Primula sinensis, 105, 185 



polyploid, 121 et sqq. 

 Pristiurus , 94, 103 

 PRO-CHROMOSOMES, 45, 307 

 progeny tests, 2g8 

 PRO-METAPHASE, 236, 527, 545 

 PROPHASE, 503 et sqq. 



of meiosis, 87, 89 et sqq. 



of mitosis, 22 et sqq. 

 Protenor, 358 

 PROTHALLIUM, 6 

 Protista, 2 et sqq., 13, 85 



centrosome, 533, 534 



mitosis, 47 



nucleoli, 21 

 PROTOPLASM, I 

 Protortonia, 379, 381 

 Primus, 79, VIII 



autosyndesis, 203 



chiasmata, 508 



hybrids, iy2, igj 



multivalents, 128, 132 



new species, 234 

 Prunus avium syndiploidy, 66 

 Prunus cerasus, 242 

 Prunus laurocerasus, 197 

 Pseudococcus, 310, 379 

 PSEUDOGAMY, 454, 464 

 Psilotum, 535 

 Pteridonea, syy 

 Pteridophyta, 7, 246, 436 

 Pungiiius, 536 

 Puschkinia, 27, III 

 Putorius, XI 

 Pygcsra, iy3, 210 et sqq. 



hybrids, 418 



non-pairing, 400, 404 



segregation, 247 



tetraploids, 183, igi 



triploids, 67 

 Pyrus, 128, 202, 238 



balance, 326 



QUADRIVALENT, 120, 128, 183 



et sqq. 

 crossing-over, 518 

 Hyacinthus, 127 

 segregation, 196 

 types, 124 



