Index 



377 



Pearl, R., 203, 244 



Penicillium, 289 



Pennaria, 192 



Pepsin, synthetic action of, 28, 



62,63 



Pfeffer, 92 ff . 

 Phagocytosis, 367 

 Planaria, 173 ff., 177 

 Planorbis, 142 

 Plants, heteroplastic grafting in, 



47 ff . ; regeneration in, 160 ff . 

 Polygordius, 280 

 Polymorphism, 222 

 Porthesia, 256, 280 ff. 

 Preadaptation, 12, 324 

 Precipitin reaction, 54 ff. 

 Preformation of organism in egg, 



128 ff., 142-145 



Presence and absence theory, 230 ff. 

 Primula, 243 

 Proteins, specific reactions of, 



54 ff.; and species specificity, 68; 



and evolution, 70, 348 

 Protenor, 200 ff., 208 

 Proteus, 325 ff. 

 Przibram, H., 176 

 Pure lines, 333, 334 

 Pycnopodia spuria, 74 

 Pyrrhocoris, 198 



Radiation pressure, role in trans- 

 mission of spores through inter- 

 stellar space, 34 ff. 



Rana, esculenta, 46; palustris, 46; 

 virescens, 46 



Rate of segmentation, a non- 

 Mendelian hereditary charac- 

 ter, 246 



Rau, 366 



Reaction, tropistic, 1 1 ff ., 92 ff., 

 147, 178, 187, 255 ff.; precipi- 

 tin, 54 ff.; anaphylaxis, 61 ff. 



Regeneration, 9 ff., 153 ff.; in 

 plants, i6off.; in Bryophyllum, 

 161-167; in animals, 167 ff.; 

 in Tubularia, 167-170; in 

 Cerianthus, 171 ff.; in Planar- 

 ians, 173-176; in Alpheus, 176; 

 and autolysis, 178-181; of lens, 

 182, 183; external influences 

 on, 192 ff.; of gonads in her- 

 maphrodites, 219 



Regulation, 139, 140, 141; in 



regeneration, see Regeneration. 

 Reichert, E. T., 64 ff. 

 Reseda, 90 

 Resistance of spores, 36; seeds, 36 



ff. 

 Reversibility of development, in 



Campanularia, 178 ff.; in As- 



tidians, 180; in egg, 189 ff.; in 



Antennularia, 194 

 Rhabdonema nigrovenosum, 213 

 Richet, C., 6l 

 Richter, 34 

 Ringer solution, 99 

 Robertson, T. B., 28 ff., 62 ff., 



104, 311 



Roentgen rays, 45 

 Roscoe, see Bunsen 

 Rotifers, determination of sexual 



cycle by food, 224 

 Roux, W., 141 ff. 



Saccharomyces, 36; cerevisice, 60 



Sacculina, 216 ff. 



Sachs, 88, 



v. Sachs, J., 145, 154 ff., 159, 161, 



184 



Salamandra maculosa, 339 

 Salkowski, 352 

 Salts required for life, 306 ff. 

 Sansum, W. D., 64 

 Schizophycece, 21 

 Schleip, W., 213 

 Schoenbein, 358 

 Schottelius, 334, 337 

 Schroeder, 14, 33 

 Schultze, O., 141 

 Schutze, 55 

 Schwann, 33 

 Schwarzschild, 34 

 Secretions, internal, 145, 155, 157 

 Self-digestion, 350 ff. 

 Self -sterility, 89 ff. 

 Senescence, 367 

 Sequoia, 31, 368 

 Setchell, W. A., 165, 287 

 Sex, of parthenogenetic frogs, 125; 



of twins, 211 

 Sex chromosome, 199 ff. 

 Sex determination, cytological 



basis of, 198 ff.; physiological 



basis of, 214 ff. 



