352 



INDEX 



Scmatogenesis, 250, 253, 254 

 Somatoplasm, 12, 14, 72, 113, 



196, 254 

 Soy beans, 136 

 Species, cycle, 56 



definition of, 1 



degressive, 46 



elementary, 41 



Linnaean* 1 



inconstant, 46 



origin of, 3, 41 



progressive, 41, 45 

 SPENCER, 79, 334 

 Sperm, human, 228, 252 

 Spermatid, 224, 267, 271 

 Spermatocyte, 224, 267, 271, 



273 

 Spermatogonia, 224, 267, 271, 



273 

 Spermatozoa, 221, 224, 226, 267, 



271, 273 

 Spermists, 222 

 Sphcerechinus, 231 

 SPILLMAN, 102 

 Spines, dermal, 199 

 Spiny ant-eater, 198 

 Sponges* 10, 11 

 Spontaneous generation, 9 

 Spores, 12 



Sports, 20, 40, 42, 199 

 Spotted mice, 52, 155 

 SPRENGER, 47 

 Spurs, 50 



Standard deviation, 26, 27 

 STANDFUSS, 55 

 Starchy kernel, 102 

 Starfish, 22, 25, 26, 33 

 Statoblasts, 11 

 Stature, human, 121 

 Stentor, 217 

 Sterilization, 330 

 STEVENSON, 334 

 STIEGLEDER, 164 

 Stock, 47 

 STOCKARD, 20 

 STOCKING, 136 

 STOMPS, 59 

 STOUT, 136 

 Struthio, 52 

 STURTEVANT, 59, 137, 245, 246 



Styela, 259 



Stylonychia, 136 



Submerged tenth, 320 



Subsidizing the fit, 333 



Sudan red, 71 



Sugar beet, 205 



Sugary kernel, 102 



SUMNER, 52, 76 



Sunburn, 76 



Sunflower, 48, 102 



Supplementary genes, 149, 151, 



154 



SURFACE, 136, 249 

 Survival of the fittest, 298 

 Susceptibility to disease, 312, 



317 



rust, 102 



Sweet peas, 151, 152, 235, 249 

 Synapsis, 58 

 Syndesis, 241 



Taboo, 325 



Tadpoles, 78 



Taillessness, 49 



Tails, docked, 75 



Tall peas, 98, 99, 100, 105, 107 



TANAKA, 249 



Tattooing, 75 



Tatusia, 277 



Telophase, 220, 221 



TENNENT, 231 



Tetraploidy, 59 



Tetrads, 266 



Texas fever, 82 



Thelia, 290, 292 



Theromorphs, 56 



Theory, cell, 215 



chiasmatype, 243 



chromosome, 229, 254 



mutation, 41 



pre formation, 253 

 Thigh-bones, absent, 50 

 THOMSON, 194 

 Thoracic bristles, 137, 143, 



145 



Thumb prints, 19 

 Tineola, 70 

 Tobacco, 48, 52, 214 

 Toenails, absent, 50 



extra, 50 



