THE EFFECTS OF CASTRATION 



143 



the male assumes his full normal plumage with all of 

 his secondary male sexual characters. It is said that 

 the comb and wattles and to some extent the spurs are 

 less developed in the capon than in the normal male. 

 But aside from this it is quite certain that the de- 

 velopment of the secondary sexual plumage in the 



(o py Ri e^rrr-tgij'^^- 



■ ^^^-/f- — Male and female Seabright. Note short neck feathers and 

 rrr b' *"' T/T '" TI" J^ ^^^ ^^^^^^^^ -^^ the slckle feathers on 

 Journal '0 ^'' ^^""'^ °^ *^^ ^"'^' ^^^^^' "Reliable Poultry 



male is largely independent of the presence of the sex 

 glands. 



The method of inheritance of the secondary sexual 

 characters in birds has been httle studied. Daven- 

 port has reported one case, but I am not sure of his in- 

 terpretation. ^ I have begun to study the question by 

 usmg Seabright bantams, in which the male lacks some 



' Because it is not evident whether the secondary sexual char- 

 acters as such are involved or only certain general features of 

 coloration. 



