Constitution of the White Leghorn Breed. 215 



barred mothers in the case of crosses with W. L. d^ c^, it being now 

 commonly assumed that the sex-limited character, barring, is in- 

 herited by -9 9 from the cf only. 



As to the production of the barred pattern de novo, it has been in- 

 dicated that barring was not obtained from two cases of matings be- 

 tween Blacks (Hamburg) and recessive Whites (Silky and Minorca). 

 That the barred character can be produced, or "synthesized" from 

 breeds not possessing the factor for barring now seems improbable; 

 and we can agree vvith Correns (1905, p. 13) when he says: "Wo 

 Mosaikbildung als Regel bei einem Bastard auftritt, war sie schon in 

 einem der Eltern oder in beiden, aktiv oder latent, vorhanden." 



VI. Literature Cited. 



Bateson, W. and Punnett, R. C, 1908. Report to the Evolution 

 Committee of the Royal Society, IV, Publ. Harrison and Sons, 

 London. 



., 1911. The inheritance of the pecuHar pigmentation of 



the Silky fowl. Jour, of Genetics, I, (3), 185. 



Cushman, Samuel, 1893. [On the production of market roasters]. 

 Ohio Poultry Jour., 1893 II, 7, 185-191. 



Davenport, C. B., 1906. Inheritance in poultry. Publ. 52 of the 

 Carnegie Institution of Washington, 17 pis., p. V-104. 



,1909. Inheritance of characteristics in domestic fowl. Publ. 



121 of the Carnegie Institution of Washington, 12 pis., pp. 1-100. 



Good ALE, H. D., 1909. Sex and its relation to the barring factor in 

 poultry. Science, N. S., XXIX, (756), 1004-1005. 



, 1910. Breeding experiments in poultry. Proc. Soc. Exper. 



Biol, and Med., (7), p. 178-9. 



Hurst, C. C, 1905. Experiments with poultry. Rpt. to the Evolu- 

 tion Committee of the Royal Society, II, Publ. Harrison and Sons, 

 London. 



