TWO PAIRS OF FEMALE TWINS 



251 



TABLE 10 

 Clutches of greatest size disparity laid by miscellaneous hybrids {a few from pure species) 



* Eggs thus marked are the very first eggs in the life of the birds that produced them. 



1 This second yolk absorbed water from the albumen during fifty-two hours, the 

 first yolk for only five hours; if this correction were made the second yolk would be 

 shown to be smaller than the first. 



2 Many eggs with imperfect shells or without shells in this series. 



