INDEX 



395 



Sex-determination of bee, 257. 



of Crustacea and roti- 

 fers, 258. 

 of squash-bug, 259. 



Sex-linked inheritance, 159. 



Drosophila tjT)e, 



164. 



poultry type, 165 



Sex-intergradcs, 213. 



Sex-mosaic, 249. 



Sex ratio in rats, 222. 



Shamel, 210. 



Sheep, docking of, 28. 



unit-characters of, 138. 



Shepherd's-purse, 193. 



Shull, 193, 228, 262. 



Silkworm, unit-characters of, 154. 

 linkage in, 176. 



Simocephalus, 213. 



Skin-color, inheritance of, 277. 



Snapdragon, 113, 174. 



Soma, 23. 



Spartan eugenics, 292. 



Spencer, Herbert, 25 



Sperm, 98. 



Standard deviation, 64. 



Steinach, 251. 



Sterility in crosses, 233. 



Stockard, 45. 



Stout, 211. 



Struggle for existence, 11. 



Sugar beet, 71. 



Sumner, 37. 



Survival of the fittest, 11. 



Sweet peas, 118, 120, 149, 173, 218. 



Swine, unit-characters of, 137. 



Syphilis, 30. 



Temperature effects, 34. 

 Texas fever, 29, 207. 

 Tomato, linkage in, 174. 

 Tower, 35. 

 Toyama, 154. 

 Transfusion of blood, 26. 

 Transplantation of ovaries, 24, 28, 251. 

 Treasury of II u ma a Inheritance, 271 



Tri-color coat, 126. 

 Tri-hybrid ratio, 107, 119. 

 Tschermak, 82. 

 Tuberculosis, 30. 

 Tubifex, 32. 



Unit-character, 91, 99, 182. 

 Unit-factor, 99. 

 Use and disuse, 20. 



Variation, 11, 19, 21, 53, 55, 71. 

 Variation of Animals and Plants under 



Domestication^ 14, 17, 19, 24, 56. 

 Variation, coefficient of, 65. 



continuous or discontinuous, 

 56. 

 Variation curve, 59. 

 Vasectomy, 291. 

 Vries, H. de, 56, 71, 82. 



Wallace, 10. 



Wedgewood, 9. 



Weight of Harvard students, 57, 61, 63. 



Weismann, 21, 29, 34, 41, 47, 231. 



Wentworth, 135. 



WTieat, crosses of, 192. 



Whetham, 297. 



White spotting, 125, 188. 



Whiting, 129. 



Whitney, 254. 



Wilson, 259. 



Winkler, 23. 



Wislar Institute, 231. 



Wolves, coat color of, 140. 



Wright, 128, 177. 



X-chromosome, 157, 159, 260. 



Y-chromosome, 260. 

 Yellow coat, 124. 

 Yellow mice. 111. 

 Yellow spotting, 126. 

 Yule, 63. 



Zeleny, 225. 

 Zygote, 98. 



