INDEX 



625 



Penycuik experiments, the, 149 



Per on, 235 



Persistence of characters, 67 



Personal selection, 455 



Pfluger, 1 68 



Physiological units. Spencer's 

 theory of, 399, 451 



Fieri, experiments of, 64 



Pigeons, experiments on crossing, 

 138, 361 



Pigs, alleged case of telegony in, 148 



Plants, modifications in, due to en- 

 vironment, 211 



Plasticity of organisms, 72 



Plastids, 432 



Plutarch, 120 



Poisoning, 188 



Polarity, 400 



Polar nuclei, 160 



Polydactylism, 129, 287 



Poulton, Prof. E. B., 167, 171, 483 



Poultry, breeding experiments with, 

 360 



" Practical men," opinion of, as to 

 transmissibility of acquired char- 

 acters, 193 



Prantl, 483 



Prediction, 319 



Predisposition to disease, 255, 266 



" Preformationist " theories, 396 



Pre-natal infection, 189, 255 ; in- 

 fluences, '289 



Presence and Absence Theory, 347 



Pressure, results of on sole of foot, 

 210 



Prichard, James Cowles, 167 



Primrose, species of, 137 



Protenor belfragi, accessory chro- 

 mosome in, 492 



Protophyta, differentiation of, 33 



Protozoa, differentiation of, 33 



Pseudoclytia, variability of, 87, 88 



Psychosis, abnormal, 183 



Punjabis, skeletal peculiarities of, 

 208 



Punnett, R. C., on Mendelism, 343, 



40 



349. 3S 2 . 360 ; on pioportion 01 

 male and female births, 500 

 " Pure Lines," 377-9 



Quatrefages, De, 114, 120 

 Quetelet, statistical methods, 312 



Rabbits, Mendelian phenomena in, 

 363 



Rath, Dr. vom, on telegony, 158, 159 



Rauber, 407 



Reappearance of modifications, 184 



not equivalent to inheritance, 

 254 



Recapitulation theory, 125 



Recessive characters, 339, 357 



Regeneration, 444 



Regression, 320 ; filial, 128, 314 



Reibmayr, 541 



Reid, Dr. Archdall on Alcoholism, 

 276 



Re-infection, 184 



Representative particles, 450 



Reproduction, diverse modes of, 

 29 ; asexual, 35 



Resemblance, complete hereditary, 

 108 



Retrogressive varieties, 94 ; rever- 

 sion of, 134 



Reversion, 119; illustrations of, 

 120 ; definitions of, 121; in crosses, 

 133 ; interpretations in terms 

 of, 137 ; in parthenogenesis, 140 



Rohde, 281 



Riedel, 224 



Ritzema-Bos on inbreeding, 387 



Rodents, experiments on, in regard 

 to telegony, 148 



Romanes, 191,230 ; on experiments 

 on guinea-pigs, 233 



Rommel and Philipps, 333 



Rosenthal, 224 



Ross, James, 278 



Roux, 419 ; struggle of parts, 45$ 



Russell, Dr. William, 297 



