36 



MENDELISM 



CHAP. 



Breda fowl, a breed largely used in Holland. This 

 fowl is usually spoken of as combless, for the place 

 of the comb is taken by a covering of short bristle- 

 like feathers (Fig. 6, D). In reality it possesses the 



Fig. 6. 



Fowls' combs. A and B, Fy hen from rose x Breda ; C, an Fi cock from the cross 

 of single X Breda ; D, head of Breda cock. 



vestige of a comb in the form of two minute lateral 

 knobs of comb tissue. Characteristic also of this 

 breed is the high development of the horny nostrils, 

 a feature probably correlated with the almost com- 

 plete absence of comb. The first step in the 



