666 



INDEX 



qualitative differentiation, see 



differentiation, 

 quantitative data, see also statistics. 



nuclear size, 46 



spiralisation, 31 



timing of division, 31 

 quart, in a pint pot, 84 



race, 374 



geographic, 228, 361, 384 



in Drosophila pseudo-obscura, 181 

 Rana, 15, jpj, 466 

 Ranunculaceae, 84 

 Ranunculus, 115, 402 



fragments, 72 et sqq. 

 Raphanus-Brassica, 181 et sqq., 190, 



193 



pairing, 174, 210 et sqq. 



polyploid gametes, 416 



segregation, 248 



syndiploidy, 66 

 Rattiis, no, 310, 368, 370, XI 

 REDUCTION, 85, 249 



division, see meiosis. 



double, 518 



failure of, 188 



numerical, 252 

 reductional separation, 252, 2G1 

 REDUPLICATION, see duplication, 

 regeneration, 448 

 Renner, 248, 338, 577 



effect, 340 

 reproduction, gene, 182, 331 



semi-clonal, 463 



sexual, 4, 219, 300, 434 



sub-sexual, 477 

 Reptilia, 82 



repulsion, 103 et sqq., 481 et sqq., 

 503 et sqq. 



between centromeres, 152, 235 



body, 524, 528 



centrosome, 525, 531 

 resting nucleus, 23, 34, 42 et sqq., 426 

 RESTITUTION NUCLEUS, 297, 



414, 436, 454 

 Rhabdilis, 311 et sqq., 404, 450, 464 

 Rhodites, 450 

 Rhodophyceae, 6, 7 

 Rhceo, 80, 151, 160, 338, VI 



coiling, 4g2 



ring formation, 154 



terminalisation, 112 

 Rhogostoma, 31 

 Richardson, 268 

 Ribes, 56, 79, 173, 567 



RING chromosomes, at meiosis, 

 bivalents, 108 

 interlocking, 256 

 multivalents, 124, 128, 149 et 



sqq. 

 and segregation, 248 

 at mitosis, 24, 272, 424, 502, 554 

 in Crepis, 73 

 in Zea, 74, 557 

 Ring formation, with interchange, 



149, 340 

 Rosa, conditional precocity, 314 



interchange, 156, J59, 161 



pollen grains, 224 



polyploidy, 227 



terminalisation, 508, 511 



univalents, 418 

 Rosa canina, 460 et sqq. 

 Rosaceae, 326 



Rosenberg, 45, 413, 453, 456 

 Rotifera, 376, 459 

 Roux, 22 

 Rubus, hybrids, 194, 208 



polyploidy, 189, igo, igi 



pseudogamy, 465 



secondary pairing, 238 

 Rumex, basic number, 239 



intersexes, 387 



trisomic, 364 

 Rumex acetosa, 79, 199, 364 



fragments, 145 

 Rumex acetosella, 161, 214 

 Rumex Hydrolapaihum, 197, 225 



Saccharomyces, 10 



Saccharum, igi, 314, 402 



Sagittaria, no, 487 



Sakamura, IV 



Salamandra, 28, 536 



salivary glands, 175 et sqq., 308, 



•396, VII 

 Salvia, 173 

 Sansome, 263, VI 

 Saprolegnia, 82, 83, 442 

 SATELLITE, see trabant. 

 Saturnia, igi 

 Sax, 487, 570 

 Saxifraga, igo 

 Schistocerca, 82, 125, 129 

 Schizophyllum, 442 

 Schrader, 381, 431, 543 

 Sciara, iy8, 543 



chromosome diminution, ^S 

 scientific method, 298, 302, 333, 479 



etsqq., 563 



