72 



INHERITANCB IN POULTRY. 



The result is peculiar. Usually the vulture hock is absent in the first 

 hybrids, indicating its recessiveness. In crosses with a particular race — 

 Tosa fowl — ^however, there is no recessiveness. It is probable that the Tosa 

 fowl is heterozygous in respect of this characteristic. The new character- 

 istic is recessive, but imperfectly so. 



FOOT FEATHERING. 



Foot feathering, as the discussion on page 34 indicated, is a positive vari- 

 ation, new to Galliis, but not of a pathological sort. Common among wild, 

 scratching birds, its occurrence in Gallus may be regarded as a case of de- 

 gressive variation (de Vries ). The distribution of its occurrence is as follows : 



Minorca X Dark Brahma 



Leghorn female X Dark Brahma 

 male 



Dark Brahma female X Leg- 

 horn male .... 



Black Cochin X Leghorn 



Leghorn X Buff Cochin 



Tosa X White Cochin 



Dark Brahma X Tosa 



Frizzle X Silky 



Black Cochin X Rumpless Game . 



Total 



The foregoing statistics tell only a part of the story. Booting, when 

 present, is frequently much reduced ; one may regard absence of booting as 

 the extreme condition. Booting is dominant, but usually imperfectly so. 



E.XTRA TOES. 



The extra toe is a positive variation of a teratological sort, 

 tion of its occurrence is as follows : 



The distribu- 



