6o4 



INDEX 



Roux, 420, 424 ; struggle of parts, 



459 

 Russell, Dr. William, 297 

 Rust in wheat, 360 



Sachs, 429 



Sadler, 492 



Saint-Hilaire, Etienne Geoffroy, 370 



Salisbury, Lord, on natural selec- 

 tion, 332 



Sandeman, George, on congenital 

 and acquired characters, 177 



Sanson, 116; on telegony, 145 



Schliiter, Dr. R., on congenital tuber- 

 culosis, 284 



Schmankewitsch, experiments, 213 



Schultze, 492, 493 



Secondary effects of disease, 269 



Seed-reversion, 136 



Segregation, law of, 339 



Selection, 531 ; and stimulus, 243 ; 

 Mendelism, 375 



Settegast on telegony, 194, 227 



Sex, heredity and, 481; determina- 

 tion of, 204,476; what it means, 

 481 



Sheep, Mendelian phenomena in, 

 366 



Shoemaker, anatomical peculiari- 

 ties of, 209 



Short-sightedness, 272 



Silkworms, experiments with, 361 



Snails, experiments with, 362 



Social aspects of heredity, 519 ; 

 variations, 5 1 5 



Sociology, relations of biology and, 

 508 



Sociomorphism, 368 



Somatic cells and germ-cells, differ- 

 ence between, loi ; modifica- 

 tions, 172 



Sommer, Max, experiments, 235 ; 

 results, 236 



Species, elementary, 94 ; hybrids, 

 386 



Spencer, Herbert, on acquired cha- 



racters, 166, 181, 183, 194, 205^ 

 237 ; on telegony, 145-6 ; on 

 his inheritance, 115; on plant- 

 modifications, 212 ; his theory of 

 physiological units, 403, 455 



Spermatogenesis, 48 



Spermatozoon, the typical, 40 



Spore- formation, 422 



" Sports," 76 



Sprenger, 97 



Standfuss, hybridisation of butter- 

 flies, 118, 215 



Staples-Brown, R., 363 



Starkweather, 492 



Star primrose, origin of, 86 



Statistical methods, 312; results, 



329 

 Stature, inheritance of, 112 

 Stephens, 1 13 

 Stock-breeding, illustrations from, 



381 



Strasburger, Prof., on fertilisation 

 in higher plants, 63 ; material 

 basis of inheritance, 430 



Sutton on combinations of chro- 

 mosomes, 104 ; segregation of 

 gametes, 348 



Syphilis, " hereditary " or " con- 

 genital," 185, 286 



Telegony, 143 ; representative al- 

 leged cases of, 145 



Thaer, 229 



Theological theories of heredity, 398 



Thomson, Dr., of Alva, on the alco- 

 holic habit, 276 



Tietz, 224 



Toe, dwindling of little, 210 



Tours, Moreau de, 282 



Toxins, 219 



Toyama, 356, 361 



Transient adjustments, 174 



Transmissiou of acquu-ed charac- 

 ters, 164 ; hypotheses as to 

 mechanism of, 199 ; Spencer's 

 theory, 199 



