R C. PUNNETT AND THE LATE MaJOR P. G. BaILEY 285 



bimodal. A higher mode at about grade 6 was to be expected, but so 

 also was another one at about grades 2 — 3. It is clearly not there and 

 we cannot account for its absence. 



Egg-colour and down-colour. 



A. In the Brown Leghorn-Langshan cross. 



We have already mentioned that in the Langshan and Leghorn 

 cross the brown-striped down behaves as a simple recessive to the 

 black. F^ pullets black in the down develop for the most part into 

 full blacks, though some may show a little gold in the hackle, and a 

 little brown mossing in the wings. The brown-striped F2 chicks feather 

 up into various types of brown, a bird not far removed from the Dark 

 Dorking type being perhaps the most common. The typical Brown 

 Leghorn reappears but rarely. Of the 65 ^2 ? ? tested for egg colour 

 ex Brown Leghorn % x Langshan j/* (Fig. 1) 19 were brown-striped in 

 the down, and 46 were black. If the two down classes are considered 

 apart a remarkable difference is noticeable in the distribution of the 

 Qgg tints. For nearly all of the birds laying a white or almost white 

 egg belong to the blacks (Fig. 8), eggs of such tint being but rarely 

 found among the browns (Fig. 9). At first sight it seems tempting to 



il.-} I 



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Fig. 8. Distribution of grades of egg-colour in the black F^ birds 



ex Brown Leghorn $ x Langshan ^ . 



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Fig. 9. Distribution of grades of egg-colour in the brown F^ birds 



ex Brown Leghorn $ x Langshan ^. 



