336 



THE AMERICAN NATURALIST [Vol. XL V 



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dity" gametes. Then E248 may be supposed to have 

 originated from the union either of two ' 'high fecun- 

 dity" gametes or one high and one low fecundity gamete. 

 She then would be either a DD or a DR bird, on the as- 

 sumption, which the facts seem to support, and which I 

 have more fully discussed elsewhere, 12 that high fecun- 

 dity is dominant over low. 



