D.— ZOOLOGY 113 



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 JuLL, M. A. : ' The Sex Ratio in the Domestic Fowl in Relation to Size of Family,* 



Poult. Sci., 10, 125-130 (1931). 

 King, H. D. : ' The Sex Ratio in Hybrid Rats,' Biol. Bull., 21, 104-112 (191 1). 

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