128 



Experimental Zoology 



assume that single comb and V-shaped comb (that of the Polish) 

 are contrasted characters, and the Y-shaped comb is a combined 



FIG. II. Male and female black Polish fowls, Figs. I and 2; male and female 

 black Minorca, Figs. 5 and 6 ; and hybrids, male and female, Figs. 3 and 4. 

 (After Davenport.) 



form constantly reproducing itself. Further work must decide 

 between these alternative views. 



