COMBS OF FOWLS 



A. Single serrated comb, as in Leghorns and Minorcas. 



B. Pea comb, with three well-marked ridges of little papilla, the median one a little 

 higher than the others, as in Indian game-fowls and Brahmas. 



C. Rose comb, with a flattened area bearing papilla;, and behind these a pike, as 

 in Hamburgs and Rose-combed Dorkings. 



The pea character shows definite dominance, thus pea X single yields pea. The rose 

 character also shows definite dominance, thus rose X single yields rose. 



But rose X pea yields out of sixteen cases an average of nine" walnuts," a different kind 

 of comb altogether. The walnut comb has no distinct papilla; 1 ike the rose, or ridges like the 

 pea. It shows a corrugated surface suggesting a walnut, and there is generally a curious 

 band of bristles crossing the comb at the beginning of the posterior third. The rest of the 

 members of an average sixteen series from rose X pea are three "rose." three " pea," and one 

 single a result which admits of reasonable Mendelian interpretation. 



