DILUTION EFFECTS IN CERTAIN EYE COLORS 459 



as on page 456 and the separation of the females is an analogous 

 one differing only in that the colors of the females correspond 

 exactly class by class to that of the 7nales instead of being darker in 

 every case as before: 



The comparisons of males and females of like color are here 

 observable in the same experiment, though they have all been 

 studied intensively elsewhere. 



' Eosin vermilion pink 



This eye color, which has been fully described on page 440, is 

 the lightest eye color we have tried to synthesize. Without in- 

 troducing other factors into this paper, the only dilution we can 

 subject it to is to make the female a white-eosin compound ver- 

 milion pink. 



White-eosin compound vermilion pink 



Females of this kind were obtained in reciprocal crosses. The 

 most advantageous cross is to mate eosin vermilion pink females 

 to white vermilion pink males, since this gives in Fi eosm ver- 

 milion pink males to compare directly with the compounds. As 

 expected the daughters and sons were exactly alike in color. The 



