166 



THE AMERICAN NATURALIST 



[Vol. XLVII 



female. Unfortunately, only one of the females from 

 which the ovary (naturally only the left, since it was 

 assumed that the right had completely degenerated) was 

 removed, reached maturity. There is no doubt as to th« 

 effect of ovariotomy on this individual (Fig. 2), which 



commonly passed as a cock, with those unacquainted y 

 the bird's history. Nevertheless, the assumption of male 

 characters has not been quite complete, as is shown by a 

 consideration of the following features. First, the pres- 

 ence of feathers on the back which are very much hen- 

 like (Fig. 3, B). Second, the wing bow is poorly de- 

 veloped. Third, the shank is too short for that of a cock. 

 In some points of behavior, such as lack of the crowing 

 instinct, non-combativeness, cackle and general indiffer- 

 ence to the hens, she is hen-like. On the other hand, her 

 carriage is cock-like and by suitable means she has been 

 made to cluck like a cock and even to pay a little atten- 

 tion to the hens, though this last reaction was produced 

 only once or twice. The peculiar shape and carriage of the 

 tail probably has nothing to do with the effects of castra- 

 tion, since this bird had only half a rump. Moreover, a 

 rumpless cock occurred in this same strain. 



