INDEX 



603 



suits, 330 ; inheritance of mental 



and moral characters, 525 

 Peas, differentiating characters of, 



338 ; hybridisation of, 341 

 Peculiarities, persistent, 70 

 Penycuik experiments, the, 149 

 Peron, 235 



Persistence of characters, 67 

 Personal selection, 459 

 Pfliiger, 168, 490 

 Physiological units, Spencer's 



theory of, 403, 455 

 Pieri, experiments of, 65 

 Pigeons, experiments on crossing, 



138, 363 



Pigs, alleged case of telegony in, 148 



Plants, modifications in, due to en- 

 vironment, 212 



Plasticity of organisms, 72 



Plastids, 436 



Plutarch, 120 



Poisoning, 188 



Polarity, 404 



•Polar nuclei, 160 



Polydactylism, 129, 289 



Poulton, Prof. E. B., 167 



Poultry, breeding experiments with, 

 362 



" Practical men," opinion of, as to 

 transmissibility of acquired char 

 acters, 193 



Prediction, 319 



Predisposition to disease, 255, 266 



" Preformationist " theories, 400 



Pre-natal infection, 189, 255 ; in- 

 fluences, 290 



Pressure, results of, on sole of foot, 

 210 



Prichard, James Cowles, 167 



Primrose, species of , 137 



Protenor belfragi, accessory chro- 

 mosome in, 487 



Protophyta, differentiation of, 34 



Protozoa, differentiation of, 34 



Pseudoclytia, variability of, 87, 88 



Psychosis, abnormal, 183 



Punjabis, skeletal peculiarities of, 

 208 



Punnett, R. C, on Mendelism, 343, 

 350, 352, 362 ; on proportion of 

 male and female births, 504 



Quatrefages, De, 114, 120 

 Quetelet, statistical methods, 312 



Rabbits, Mendelian phenomena in, 



369 

 Rath, Dr. vom, on telegony, 159 

 Rats, Mendelian phenomena in, 



368 

 Rauber, 411, 504 



Reappearance of modifications, 184 

 — not equivalent to inheritance, 254 

 Recapitulation theory, 125 

 Recessive characters, 118, 339, 357 

 Regression, 313, 317; filial, 128 ; 



in blended inheritance, 317 

 Re-infection, 184 

 Representative particles, 450 

 Reproduction, diverse modes of, 



29 ; asexual, 35 

 Resemblance, complete hereditary, 



106 

 Retrogressive varieties, 95 ; rever- 

 sion of, 134 

 Reversion, 119; illustrations of, 

 1 20 ; definitions of, 121; in 

 crosses, 133 ; interpretations in 

 terms of, 137 ; in parthenogene- 

 sis, 140 

 Rohde, 281 

 Riedel, 224 



Ritzema-Bos on inbreeding, 392 

 Rivers, Dr., on colour-blindness, 



273 

 Rodents, experiments on, in regard 



to telegony, 148 

 Romanes, 191, 230 ; on experiments 



on guinea-pigs, 232, 233 

 Rommel and Philipps, 330 

 Rosenthal, 224 

 Ross, James, 276 



