180 



Bulletin No. 155.— 1913. 



generation, raised in 1912, was composed entirely of white birds- 

 The results in F2 (1913) are shown in Table 16. 



Table 16. — Showing the results in F2 from the matmg of White Leghorn X 

 Black Java eross-breds (1913 series). 



*The sex of the black and the barred birds could not be ascertained in time to report in this 

 publication. 



tOver 3 weeks old when described. 



The data presented in Table 16 indicate that in F2 of the cross 

 under discussion, white, barred and black birds appeared in the 

 ratio 55 : 17 : 5. 



(White Leghorn cf X Black Minorca 9 ) cf 



Black Minorca 9 \ X 



Case 5. — d^ < 



9 Black Java 



Cross-bred 99, heterozygous for barring . Nature of mating: CCBbffii 

 X CCBbFfii. (For discussion, see p. 203). 



Male 477 V was a fairly well-barred bird but with dark under-color. 

 The general tone had a brownish tinge. The 9 9 mated with him 

 had the ancestry given below: 



cf [Wh. Leqhorn cf X Blk. Hamburg 9 ] 



461 E.— r^ 



{Wh. Leghorn cf X Blk. Hamburg 9 ) cf 



iWh. Leghorn cf X Blk. Hamb. 9 ) 9 

 343 B, E. — Out of mating given in Case 3e; from black 9 • 



