INDEX 



ALLEN, Mr. J. A., on variation 



under nature, 34. 

 Amixia, 12-28, 110-115, 117- 



^S- 

 Apogamy, 5, 6, 10, 18, 28. 



B. 

 BELT, on physiological selection, 



BERG SAGNITZ, Count, on self- 

 fertilization and variability, 177. 

 Breeding, separate and segregate, 



5- 



Buttei flies of polar regions and 

 Alps, 133. 



C. 



CATCHPOOL, Mr. , on physiological 



selection, 44, 137. 

 Cross-infertility, 46; and varietal 



divergence, 82 ; and diversity of 



life, 169; and stability, 170; 



and specific differentiation, 170; 



in domesticated cattle, 170; 



testing for, 172; Fritz M tiller on, 



174. 



D. 



DARWIN, Charles, on isolation, 

 a, 106 ; on diversity under 

 nature, 31 ; on the fertility of 

 varieties, 50 ; on the origin of 

 cross-infertility, 51 ; on distri- 

 bution, 68 ; on prepotency, 89 ; 

 on geographical isolation, 101, 

 108; on methodical selection, 



102 ; on modification in large 

 arms, 103 ; on the swamping 

 effects of intercrossing, 105; on 

 independent variability, 109 ; on 

 domestic animals, no. 



DELBCEUF, law of independent 

 variability, 13. 



Differentiation under natural se- 

 lection, 37. 



Diversity of life and cross- infer- 

 tility, 169. 



Domesticated cattle and cross- 

 infertility, 170, 172. 



E. 



Evidences of physiological selec- 

 tion 62. 



Evolution, monotypic and poly- 

 typic, ai, 75, 102, 107, 112, 

 129. 



Experimental research in physio- 

 logical selection, 85. 



F. 



Fertility of domesticated varieties, 



172. 

 FOCKE, Herr, on hybridization, 



'" G. 



GALTON, Mr. Francis, law of 



regression, 39. 

 General conclusions, 144. 

 Geographical distribution and 



physiological selection, 65. 

 GIARD, M., on apogamy, 14. 

 GRABHAM, Dr., on mollusca of 



Madeira, 135. 



N 



