304 



R. M. STRONG. 



ness of plumage behaves as a sex-linked character in the crossings 

 which are described in this paper. Associated with this whiteness 

 are the pigmentation phenomena of the eye, and the scantier 



TABLE VI. 



WHITE MALE X BLOND Fi HYBRID FEMALE (TABLE I.). MATING 10. 



Offspring 2 blonds: i male and i sex ?. 

 i white: sex ?. 



B.cT B. W. 



X 



B.d" 



B.9 



X 



W.cf 



W. 9 (Original Stock.) 



TABLE VII. 



WHITE MALES X WHITE Fi HYBRID FEMALES (TABLE II.). MATINGS 8 AND 9. 



Offspring 18 whites: 2 males, 3 females, 13 sex ?. 

 W.c? W. 9 



x- 



B.9 W. 9 



x- 



W.d* 



B. 9 



(Original Stock.) 



TABLE VIII. 



BLOND MALE X WHITE HYBRID FEMALE (TABLE V.). MATING 32. 



Offspring 3 blonds: 2 males and I sex ?. 

 B.d" B. 



1 

 B.c? B.9 W. 9 



x- 



B.rf 1 



B.9 



x- 



B.cf 



W. 9 



B.9 (Original Stock.) 



