INHERITANC]^ OF FECUNDITY IN DOMESTIC FOWl.. 



3^59 



record of ? 558, will be clear, it being understood that 'n' de- 

 notes a visit to a nest and the performance of those acts char- 

 acteristically associated with the la_ying of an egg, but without 

 the extrusion of an actual egg. 



From this record taken in connection with other similar cases 

 studied in his laboratory, there can be no doubt that ? 558 

 belongs gametically in the class 'Under 30.' 



Another point is with- reference to the mating $ 564 X- 

 2 405. The excess of 'Over 30' birds here is in part due to 

 the fact that two birds, which have winter records respectively 

 of 32 and 34 eggs and are almost certainly to be regarded as 

 somatic fluctuations above the division point at 30 are included 

 in the 'Over 30' class. 



Date. 



1 



2 



3 



4 



^ 



6 



7 



8 



9 



10 



11 



12 



B 



14 



15 



16 



17 



18 



19 



^ 



^ 



22 



23 



24 25 



26 



27 



28 



29 



30 



31 



Nov. 

































































Dec. 

































































Jan. 























n 















n 



n 



n 





n 



n 





n 



n 





ff 







n 



Feb. 







n 



n 





rf 



n 



n 







n 



rf 





tl 



n 









n 







n 









n 





n 









Mar. 



n 





n 



n 





n 



n 



n 









n 



rf 



n 



n 



n 







n 



n^ 





n 



n 



n 



n 



n' 



n 





n 



n 



Apr. 



n 



n 





rf 



n 



n 



n 



n 



n 



n 





n 



n 



n 





n 



n 







n 



n 







n 



n 



n 







n 



n 





May 



n 



n. 



n 





n 



n 



n 



n 





n 



n 



n 



n 







n 



n 



n 



n^ 





n, 





n 





n 







n 



n 



n 





Jun. 



n 



n^ 







n 



n' 





n 



n 











n 



n 





n 



n 



n 





n' 



n 











n 



n 









Jul 



n 



n 



n 





rr 



n 



n 







n 



n 



n 





R 





















n 







n 









rf 



n 



Aug. 



a 







n 



a 





a 



a 





It 



a 



a 





a 



a 



a 



a 



_ 



a 























a 



aJ 



Fig. 452. Nesting record of ? 558. 'n' denotes a visit to the trap- 

 nest, n^ indicates that the bird visited the nest twice on the same day. 

 B indicates that the bird became broody, and O that she ceased manifes- 

 tations of broodiness. 



If the totals are moctified in accordance with the above sug- 

 gestion we get 



Winter Production: Over 30 Under jo Zero 



Observed: (modified) 172 17'k i 



Expected • 18 18 



Mean winter production 60.00 eggs 15.40 eggs o eggs 



B. Type of mating: //^Xz. fhh \ 



or I X fl^L,. FLih 



fU.. fLl, 1 



