566 



C. C. Guthrie 



ventral surface were uniformly black after the first moult. Occa- 

 sionally a normal black may retain one or several white feathers 

 in the tip of the wing permanently, but this is of rare occurrence 

 and such white feathers have not been observed in any other 

 situation. 



The normal white chicks were pure white to light buff when 

 hatched but after the first moult they were always pure white. 



Bl 



/3 chicks 



Wr 



IS chicks 



Fig. I Controls 



The black hen {B^ carrying an ovary from a white hen {W^ 

 mated to the white rooster, gave about equal numbers of white 

 and spotted fetuses and chicks. (In all c2iSQ.soi very small white 

 fetuses, spots may have been overlooked.) 



The white hen {W^ carrying an ovary from a black hen {B^ 

 mated to the white rooster, gave white, black and spotted fetuses 

 and chicks. The spotted ones outnumbered the others combined. 



