The fertilizability of nucleated and non
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Donald Paul Costello
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Article
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1940
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John Wiley and Sons
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English
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## SIX FIGURES Studies of marine ova have shown that the eggs of different species can be fertilized before, during, or after maturation. Four classes have been distinguished (Mead, 1898) : (1) those eggs fertilizable in the germinal vesicle stage; (2) those fertilizable at the metaphase of the fi