INDEX 



62' 



Penycuik experiments, the, 149 

 Peron, 235 



Persistence of characters, 67 

 Personal selection, 455 



Pfliiger, 168 



Physiological units, Spencer's 

 theory of, 399, 451 



Pieri, experiments of, 64 



Pigeons, experiments on crossing, 

 138. 36i 



Pigs, alleged case of telegony in, 148 



Plants, modifications in, due to en- 

 vironment ,211 



Plasticity of organisms, J2 



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 belfmgi, 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, 35 2 - 3 6 o; on pioportion of 

 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, 155 

 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, 



10S 

 Retrogressive varieties, 94 ; rever- 

 sion of, 134 

 Reversion, 119; illustrations of, 

 1 20 ; definitions of, 1 2 1 ; 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, 455 

 Russell, Dr. William, 297 



