234: PRINCIPLES OF STOCK-BREEDING. 



the female offspring were setters, having the color of 

 their mother. 1 



" A family of Angora eats, of which the mother 

 is white and deaf ; the father, which hears, is white 

 and black ; all the kittens which are born white are 

 deaf as the mother, those which resemble the father 

 are not so." a 



In the case of Augustin Duforet, already referred 

 to, the malformed digits in the third generation were 

 inherited by the twelve sons, while the seven daugh- 

 ters were exempt, and the same sexual limitation oc- 

 curred in the second generation with a single excep- 

 tion. 8 



Mr. Dallas, 4 in one of the Highland Agricultural 

 Society essays, already mentioned, advances the theory 

 that the male has the greatest influence on the exter- 

 nal appearance of the offspring, and the female on 

 the internal qualities ; and this division of influence 

 he accounts for on the supposition that the seminal 

 fluid of the male invests the ovum, and thus forms its 

 outer envelope, while the germ itself, from which the 

 internal structures are formed, is furnished by the 



1 Sedgwick, loc. cit., April, 1863, p. 451, who quotes from "De la 

 Generation," by Girou, p. 123. 



2 Sedgwick, loc. cit., p. 458 ; on the authority of M. Bouvyer-Des- 

 mortiers. 



8 Quite a number of instances of sexual limitation of hereditary 

 characters may be found among the cases cited to illustrate other 

 forms of heredity in the preceding chapters. A summary of the 

 facts presented by Dr. Prosper Lucas and Mr. Sedgwiek, with addi- 

 tional cases, has been given by Darwin, in " Animals and Plants under 

 Domestication," vol. ii., pp. 93, 94. 



4 " Transactions of the Highland Society," vol. i., p. 43. 



