328 SCIENCE AND PHILOSOPHY OF THE ORGANISM 



Physiology, 12 



of development (morphogenesis), 20 

 Planaria, 130, 155, 1621'., 200 

 Plants, 48 f. 

 Plato, 2 

 Pluteus, 42 

 Poisons, 205 ff. 

 Pole, 36 

 Polarity, 106 

 Potencies, complex, 112, 120 



explicit, 84 



implicit, 84 



primary, 84, 111 



prospective, 77 ff., 83, 89, US, 125, 

 241 



secondary, 84, 110 

 Poulton, 198 

 Precipitin, 207 f. 

 Pressure experiments, 63, 141 

 Primary potency, 84, 111 



purposefulness, 146, 287 



regulation, 85, 174, 188 

 Progress, 305 

 Pronuclei, 55 



Prospective potency, 77 ff.. 83, 89, 118, 

 125, 241 



value, 77f., 80, 122 

 Protista (Protozoa), 27, 130, 236 

 Protoplasm, 28, 30 



morphogenetic role of, 67 

 Przibram, 112, 248 



Radl, 247 



Rauber, 235 



Reaction, answering, 181 



Reciprocity of harmony, 156 1. 



Re-differentiation, 75, 111, 163 



Regeneration, 55, 74, 105, 111, 221 



super-, 115 f. 

 Regulation, 68, 73, 85, 111, 165 



denned, 166 



metabolic, 198 f. 



secondary, 85, 165, 188 

 Reinke, 146 

 Restitution, 21, 74, 110, 11211. 



defined, 166 



and Darwinism, 267 



and Lamarckism, 286 



of second order, 158 

 Retina, 191 



Retro-differentiation, 163 f. 

 Rhumbler, 93 

 Ribbert, 114 

 Rickert, 31511'. 



Roux, 26, 48, 55 ff., 66 f., 76, 89, 921'., 

 108, 161, 176 f., 241 



Rubner, 193 



Sachs, 117 

 Sadebeck, 279 

 Salamandrv ', 175, 281 

 Schneider, 146 

 Schultz, E., 200 

 Schultze, 0., 67 

 Schwendener, 177 

 Science 14, 297 



natural, 1 ff. 



rational, 12 

 Sea-urchin, see Echinus 

 Secondary potency, 84, 110 



regulation, 85, 165, 188 

 Secretion, internal, 116, 200 

 Segmentation, 35 



Selective qualities (of tissues), 186 

 Self-differentiation, 108 

 Senion, 21 6 f. 

 Sex, 107 



Single, the, 315ff. 

 Skeleton, 40 ff., 44, 47, 92 

 Spemann, 105 



Spermatozoon (spermia), 32 ff. 

 Splitting (of hybrids), 229 f. 

 Stahl, 197 

 Standfuss, 278 

 Starfish, 44, 81, 122 

 Starling, E., 116, 204, 212 

 Stentor, 131 

 Stimuli, directive, 102 ff. 



formative, 102ff., 113, 118, 133 



of restitutions, 1 1 3 f. 

 Structure of protoplasm, 66, 69, 72 f. 



85, 88 



Substance, living, 1 7 

 Sumner, 196 



Super-regeneration, 115f. 

 Surface-tension, 91 

 Sutton, 230 



Symmetry, 39, 68, 70, 72, 89, 98 

 System, combined types of, 15311'. 



complex, 2191'. 



complex-harmonious, 155 



equipotential, 1 20 



harmonious-equipoteiitial, 121 ff., 1511'. 



mixed-equipoteutial, 154 



morphogenetic, 119 f., 163, 241 

 Systematics, 14 ff., 21, 243 f., 253, 264. 

 293, 296 



Taine, 308, 310 

 Theology, natural, 1 ff'. 

 Thomson, J. A., 16 

 Thymus, 204 



