INHERITANCE OF FECUNDITY 229 



B. With 1 B.P.R. 9 indicated to be of class 4 = JL.U . FLJ-i. 



9 Progeny 



Winter Production: Over SO Under 30 Zero 



Observed 1 



Expected 10 



Observed winter production. . . 10 eggs 



All 9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed .18 



Expected 18 



Mean winter production 12 . 72 eggs 



The accordance between observations and expectation here is 

 perfect. 



Mating of C.I.G. d" 529. Indicated constitution: class 2 

 (C.I.G. cf) = fL,h . fhk. 



Matings: A. With 1 9 indicated to be of chass 1 = /L1L2 . Flih. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 1 1 1 



Expected 2.25 075 



Observed winter production. .. . 46 eggs 13 eggs eggs 



This mating by itself is, of course, without any particular sig- 

 nificance. 



B. With 6 9 9 indicated to be of class 2 = /L1L2 . FLih 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 5 12 



Expected 17 



Mean winter productions of all 



9 9 in indicated class 41.60 eggs 11.67 eggs 



Here, again, as in the case of d" 558 there are seen to be several 

 birds with winter records of over 30 eggs, when none is expected. 



