444 



INDEX 



Overton, reduction, 223, 236, 248~, 249 



somatic pairing, 256, 257 

 Ovum, 221, 274, 275, 276 



activation of, 284 ff. 



organization of, 328 ff. 

 Oxidation, and chondriosomes, 123, 124 



in egg, 285, 287 



and nucleus, 70 



and sex-determination, 368 

 Oxychromatin, 64, 66, 70 



Pace, 300, 315 



Pachynema, 231, 232, 233 



Pachytene, 231, 233, 258 



Padina (brown alga), 223 



Palladin, 135 



Pallavicinia (liverwort), 122, 220, 248 



Pangenesis hypothesis, 398, 399 



Pangenosomes, 258 



Pangens, 258, 399 



Parallelism of chromosomes and 



characters, 342-343 

 Paramitome, 33 

 Paramoecium, 30, 60, 207, 283 

 Paramylum, 108, 112 

 Parasynapsis, 228, 231, 233, 234, 235, 



243, 248, 250, 251, 257 

 Parasyndese, 228 

 Paratettix (grasshopper), 391 

 Parechinus (sea urchin), 326 

 Parental chromosome sets, 254, 279, 340 

 Paris (angiosperm), 301 

 Parmenter, 160, 163, 319 

 Parthenogenesis, 314, 317, 364 



artificial, 284 ff. 

 Passiflora (angiosperm), 181 

 Patterson, 213 

 Paulmier, 95, 244, 245 

 Pay en, 11, 193 

 Payne, 119, 359, 360 

 Pea, Mendelism, 336, 337 



linkage, 378, 384 

 Pearl, 138 

 Pearson, 52 

 Pectates, 194 

 Pectose, 194 

 Pediastrum (green alga), 140, 331, 334, 



411 



Pedicellina (flatworm), 255 

 Pelargonium (angiosperm), 104, 332 

 Pellia (liverwort), 82, 87, 88 

 Pellicle, 45 



Pensa, 117, 122 

 Pentose and pentosan, 41 

 Peperomia (angiosperm), 299 

 Peptone, 40 



Peranema (flagellate), 83 

 Percnosome, 89 

 Perforatorium, 273, 276, 277 

 Perikaryoplasm, 177 

 Perinium, 195 

 Peripatus (arthropod), 281 

 Periplaneta (cockroach), 239 

 Periplasm, 289 

 Periplast, 44 

 Perispore, 195, 196 

 Perivitelline space, 277 

 Perla (stone-fly), 239 

 Permeability, 37, 43, 287 

 Peronospora (fungus), 290 

 Peziza (fungus), 80, 81, 223, 291 

 Pfeffer, aleurone grain, 134 



amitosis, 211 



cell wall, 193 



ectoplast, 42 



oil body, 110 



protoplasmic connections, 47 

 Pfitzner, 33, 155 

 Pfluger, 328 

 Phseophyceae, 108, 222 

 Phajus (orchid), 106 

 Phascum (moss), 317 

 Phases in colloids, 35 



of mitosis, 145 

 Phenotype, 339 

 Phillips, 202 

 Phosphatid, 117 

 Phospholipin, 117 

 Phosphoric acid, 40 

 Photosynthesis, 105, 107, 108 

 Phragmatobia (moth), 360, 361, 363 

 Phragmidium (fungus), 291, 312 

 Phragmites (angiosperm), 346 

 Phragmoplast, 176 

 Phrynotettix (grasshopper), 156, 158, 



162, 233, 237, 243, 258, 392 

 Phycocyanin, 104 

 Phycoerythrin, 104 

 Phycomyces (fungus), 110, 186, 187, 355, 



373 



Phycomycetes, 289 

 Phyllactinia (fungus), 80, 81, 290, 291 

 Phyllodadus (conifer), 295 

 Phylloglossum (pteridophyte), 91 

 Phyllopneuste (bird), 274 



