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Fig. lA 







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Figure 1 A. — Summer, or Inactive, stage. Follicular cells with multinucleated bodies called inclusions, 



male, August. X430. 



Figure IB. — Summer, or inactive, stage. Follicular cells with inclusions and spermballs, male, 



August, X430. 



Figure 2.— Clam partially ripe, September. X430. 



Figure 3.— Ripe male clam, October. X430. 



Figure 4.--Partlally spawned out, October, X430. 



