No. 5.3o] 



CASTRATION IN BROWN LEGHORNS 



167 



Some additional light on the question is afforded by the 

 effect produced by castration on a second female, which 

 died at the age of four months. When the first feathers 

 of the third stage began to appear, they were like those of 

 the young male. The later feathers, however, were those 

 of the normal female. The explanation of this anomalous 

 behavior was found at the autopsy, for it showed the 



A BCD E 



presence of an ovary about one half the size of that of a 

 normal chick of the same age. As long as the ovary or 

 its normal secretion was practically absent, the develop- 

 ment of this female was along lines similar to that of the 

 male, but with the regeneration of the ovary develop- 

 ment returned to its usual course. 



These experiments, then, indicate clearly that while the 

 female may assume male characters following the re- 

 moval of the ovary, the male assumes no positive female 

 characters after removal of the testes. 



