ROPES ET AL.: SIZE, AGE, AND SEX OF OCEAN QUAHOGS OFF LONG ISLAND, NY. 





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FIGURE 7. — (a) Undifferentiated gonadal tissue section from a 5-yr-old ocean quahog, Arctica islandica, 37.2 mm shell length. 



(b) Enlargement of a gonadal tubule from the same clam. 



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FIGURE 8. — (a) Differentiated gonadal tissue section in the sparse condition from a 3-yr-old male ocean quahog, Arctica islandica, 

 21.0 mm shell length, (b) Enlargement of spermiogenesis in a portion of a gonadal tubule, (c) Differentiated gonadal tissue section in 

 the sparse condition from a 5-yr-old, 37.5 mm shell length, ocean quahog. (d) Enlargement of oogenesis in a gonadal tubule. 



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