446 



INDEX 



Protoplasm, a system, 32, 49, 52 



varieties of, 41 

 Protoplasmic connections, 46 

 Protoplasmic! , 41 

 Protoplast, 12, 24 

 Protoxylem, 192 

 Protozoa, ectoplast, 44 



mitosis, 207 ff. 



nucleus 68 



reduction 222 

 Pseudapogamy, 312 

 Pseudapospory, 315 

 Pseudoamitosis, 211 

 Pseudogamy, 292 

 Pseudomitosis, 204 

 Pseudopodium, 45 

 Psilotum (pteridophyte), 239 

 Pteridophytes, fertilization, 292, 293 



sex-determination, 356 



spermatogenesis, 89 ff. 

 Pteris (fern), 248, 312, 317 

 Puccinia (rust fungus), 312 

 Punnett, 395 

 Purkinje, 11 

 Pustidaria (fungus), 116 

 Pyrenoid, 104, 108 

 Pyronema (fungus), 81, 224, 290, 291 

 Pyrrochoris (bug), 244 

 Pythium (fungus), 290 



Q 



Quadrille of centers, 280 

 Quadripolar division, 325 

 Quadrivalent chromosomes, 223 

 Qualitative division of chromosome, 227, 



229, 297, 401 

 Quantitative theory of. sex, 370 ff. 



R 



Rabbit, 212, 237 



Rabl, 157, 181, 279 



Raciborski, 110 



Ramlow, 291 



Random assortment of chromosome 



pairs, 255 

 Ranunculacese, 315 

 Raphides, 134, 135 

 Rat, 391 



vom Rath, 211, 227, 244, 245 

 Rauber, 326, 402 

 Rawitz, 77 



Reboulia (liverwort), 293 

 Recessive, 338, 339, 351 

 Recombination of factors, 343, 344 

 Reducing action of cytoplasm, 123 

 Reduction of chromosomes, in animals, 

 220 ff. 



with chromosome tetrads, 243 ff. 

 . denned, 229 



discovery, 219; 220 



modes of, 230 ff. 



numerical, 229 



in plant groups, 222-225 



in somatic cells? 259 



Weismann's theory of, 226 



without qualitative change, 249 

 Reduplication hypothesis, 395 

 Reed, 65, 70 



Refractive body, 118, 274 

 Regaud, 115, 117 

 Regeneration, 69, 137, 406 

 Regional mutation, 351 

 Reichert, 42 

 Reinke, 64 



and Rodewald, 39, 41 

 Rejuvenescence, 137 

 Remak, 10, 43 

 Reserve starch, 106, 107 

 Resin, 194 



Respiration, 123, 124 

 Resting stage of nucleus, 144, 150, 151, 



157 

 Reticular theory of protoplasm, 33, 49 

 Reticulum of nucleus, 25, 64, 144, 150, 



157 

 Rhabdites (nematode worm), 189 

 Rheum (angiosperm), 134 

 Rhizina (fungus), 291 

 Rhizonema, 83, 84 

 Rhizoplast, 83 

 Rhizopus (mold fungus), 116, 186, 187, 



290 

 Rhumbler, 183 

 Ribes (gooseberry), 236 

 Riccardia (liverwort), 82, 236 

 Riccia (liverwort), 87, 293 

 Richardia (angiosperm), 159, 248, 249 

 Richards, 158, 159, 213 

 Ricinus (castor bean), 134 

 Riddle, 369, 375 

 Ritter, 411 

 Rivett, 111 

 Robertson, A., 295 

 Robertson, T. B., 189 



