^' 



%l 



4I^- 



*^ 



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^oW^J-M^. 







Figure 3. — Portions of gonads of oysters In different stages of development. 



A. Gonad in early spring before active development of sex cells begins. 



B. Gonad of ripe male containing large number of spermatozoa (center). 



C. Gonad of ripe female containing numerous eggs. Low magnification. 



D. Gonad of ripe female showing highly magnified eggs. 



