40 



INHERITANCE IN POULTRY. 



127, 128). Mated with the hens, nine young were produced. Four of 

 these were typical White lyeghorns without black ; three others were white 

 except that black feathers occasionall}- appeared. One (No. 213) was 

 nearly solid black and one (No. 229) was black with nearly every feather 

 barred with white. It is plain that the strain I have has not been wholly 

 purified of black. This is indicated also by the fact that No. 128 has every 

 feather peppered with black — a heterozygous form of coloration. 



RESULTS. 



1 . General Plumage Color. — Of 26 hybrids, 1 1 were pure white or had 

 only a little black ; 7 were black, sometimes with a little white, and 8 were 

 barred black and white (fig. 27). The results confirm the view that White 

 Leghorn Bantan No. 126 (? has black germ cells. The barred condition is 

 unexpected and is probably recessive in the White Leghorns. 



2. Earlobp: Color. — In all cases ( 10) of adults but two, the earlobe is red ; 

 in the remaining two some white is mixed with the red. The red earlobe 

 is probably dominant, but imperfectlj^ so. 



3. Vulture Hock, — Out of 13 cases n have clearly no vulture hock and 

 two show a slight enlargement of the heel feathers. Vulture hock is prob- 

 ably recessive. 



4. Foot Feathering. — Every hybrid is booted, but the booting is less 

 heavy than in the Dark Brahma (fig. 27). Booting may be dominant, but 

 it is not perfectly so. 



CONCLUSIONS. 



The male parent is heterozygous and probably contains at least three sorts 

 of gametes, viz, pure black, pure white, and barred, the last being a mosaic* 

 The black of the mother is recessive to all of these. The occurrence of barred 

 mosaic is of interest, but it is of unknown origin. The ancestral red ear-color 

 and the new ' ' booting ' ' are both dominant. Dominance is, however, im- 

 perfect. 



Series VIII. — White Leghorn Bantam and BufF Cochin Bantam. 



STATEMENT OF PROBLEM. 



This series was undertaken to determine the method of inheritance of 

 buff when combined with a white plumage coloration. 



THK RACES AS A WHOLE. 



The White Leghorn Bantam has been described at page 39. The Buff 

 Cochin Bantam (fig. 28) is a diminutive Buff Cochin, which resembles in 

 form the Black Cochin (p. 39). Cochins as we know them to-day (the 

 name was formerly applied to a different, now extinct, race) seem to have 

 been imported into this country and also into England from eastern China 



* Castle and Allen, 1903, p. 606. 



