196 RAYMOND PEARL 



Matings: A. With 5 9 9 indicated to be of class 2 = JLiLi . FLiU. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 7 



Expected 7 



Mean winter production of 9 9 



in indicated class 54 . 57 eggs 



B. With 4 9 9 indicated to be of class 3 = fLiU • FUU. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 9 4 



Expected 6.5 6.5 



Mean winter production of 9 9 



in indicated class 56.89 eggs 19.50 eggs 



C. With 2 9 9 indicated to be of class 6 = fUU . Fhh. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 3 



Expected 3 



Mean winter production of 9 9 



in indicated class , 13.67 eggs 



All 9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 16 7 



Expected m3 .5 9.5 ' 



Mean winter production 55.87 eggs 17.00 eggs 



The agreement between observation and expectation here is 

 satisfactory, excepting the case of the class 3 females. There the 

 deviation from the expected half is wide, but the numbers in- 

 volved are small. The behavior of d" 56 with class 2 and class 6 

 females gives clear indication of his gametic constitution. 



B.P.R. d' 563. Indicated constitution = fhLi . fkLo. 



This bird was hatched in 1909 and used as a breeder in 1910. 

 He was an exceptionally fine, vigorous bird. The breeding his- 

 tory is as follows : 



