664 



INDEX 



PcBonia, 162, 262 



inversion crossing-over, 268, IX 

 Painter, 176, 368 

 PAIRING, block, 121, 127, 199 



chiasma theory of, 126 et sqq. 



failure of, 126 et sqq., 399 et sqq. 



illegitimate, 214, 225 



internal, 199 



intra-haploid, 278 



localisation, 99 



loose, 166 



at meiosis, 87 et sqq. 



non-homologous, 166, 304, 406, 489 

 in differential segments, 265, 368 

 in structural hybrids, 493 



principles of, 163 et sqq. 



secondary, 236 et sqq., 2^2, VIII 



segment, 338 



somatic, 234 et sqq., 553 



torsion, see non-homologous 

 pairing. 



touch and go, 366, 375 



in undefined hybrids, 168 



See also zygotene, auto-syndesis, 

 alio - syndesis, chiasma, 

 attraction, time-limit. 

 Pallavicinia, 366 

 Panorpa, 367 

 Pantala, 36y 

 Papaver, 202, 228, 239, 413 



hybrids, 208 

 Paracopidosomopsis (sic), 3yy 

 Paramoecium, 6, 50 

 Paratettix, 383, 464 

 Paris, no, II, XIII 

 PARTHENOGENESIS, 85, 434 et 

 sqq. 



cyclical, 383, 402 



in haplo-diploids, 376 



male, 193 



of monosomies, 316 



and segregation, 247, 298 



and spindle failure, 409 

 Pasteur, 549 

 Patau, 180 

 Pellia, 228, 308, 366 

 PENTAPLOID. 215, 218, 219 

 Pentstemon, 234, VIII 

 Perla, 311 et sqq., 363, 418 

 permanence, theory of, see theory. 

 Petunia, 318 



hybrid, ig3 

 Peziza, 261 

 Phseophyceae, 6 

 Phacellanthus, 228 



Phalaris, 228 

 PhancBUs, 94 

 Pharhitis, 445 

 Phenacoccus, 380 

 Philocamia, 58, 63 

 Phleum, i8y 

 Photinus, 3y3 

 Phragmatohia, 59, 78, X 



aggregation, 58 



chromosome length, 56 



sex chromosomes, 358, 359 

 Phrynotettix , 89, 93, 162, 261 



resting stage, 45 



terminalisation, 105 

 Phycomycetes, 6 

 Phylloxera, 402 

 Physalopiera, 115 

 Phytodecta, 367 

 Piscicola, 533 

 Pisum, 151 et sqq., VI 



crossing-over, 263 



hybrid, 160 



inversions, 274 



terminalisation, 511 

 plastids, 2, 9, 427 

 Platypcecilus, iy2 

 Plecoptera, 36y 

 Poa, 3ig, 440 

 Podisma, 4g2 



Podophyllum, acentric fragment, 271, 

 426, IX 



chiasmata, no 



non-congression, 526 



spindle, 532 



spirals, 117, 487 

 Pogonatum, 366 



POLAR BODY, 7, 41, 85, 459, 476 

 polar granule, see centromere. 

 POLARISATION, of centromere, 



413 



leptotene, 90, 500 



telophase, 44 



of univalents, 461 

 polarised light, 570 

 pole, see spindle, centrosome. 

 Polemonium, i^g, 160 

 pollen, abortion, 320, 321 



deficient, 316 



grain, 9 et sqq., II, III, XIII 



of haploids, 195 



of hybrids, 195 



inactive, 340 



mitosis, 30, 396 et sqq., 542 



of polyploids, 195 



segregation, 248 



