224: PRINCIPLES OF STOCK-BREEDING. 



father, and at another the mother. Girou de Buza- 

 reingues, in his work ' De la Generation,' containing 

 some curious facts observed by him, tells us that he 

 knew two brothers wiio in early life resembled their 

 mother, while the sister resembled the father. 



" These resemblances were such as to strike all who 

 saw them. < But now,' says he, ' and ever since their 

 youth, the two boys resemble the father, while the 

 daughter has ceased to be like him.' " * 



Cases not unfrequently occur in which the disease 

 or defect is limited to one sex and transmitted by the 

 other, as in the case of ichthyosis above noticed. 



" In the following cases of sebaceous tumors of the 

 scalp, which occurred in the practice of Dr. Henry 

 Stewart, and which were hereditarily limited to the 

 female sex, in the first case for ten and in the second 

 case for five generations, it will be observed that in 

 the first case limitation by age as well as by sex oc- 

 curred, and also that some of the females derived the 

 inheritance from their paternal grandmother by atavic 

 descent, which affords an additional proof of the influ- 

 ence of sex, for, except when a male thus intervened to 

 arrest the appearance of the disease, the inheritance 

 was direct from parent to child. . . . 



" The wife of a painter, aged fifty-four years, has 

 thirty-three sebaceous tumors of the scalp, none of 

 which are larger than a walnut ; but thirteen years ago 

 nine sebaceous tumors, varying in size from a nutmeg 

 to a small orange, were excised by the late Mr. Mor- 

 ton, with considerable relief to the severe headaches 

 she had previously suffered from ; her daughter and 

 'Ribot on "Heredity," p. 3. 



