Il8 THE OYSTER. 



PLATES VIII, IX, X, XI, XII, XIII. 



(Tiles which were deposited in the Little Annamessex River 

 by Lieut. Francis Winslow, U. S. N., on July 9, 1879, ^^r the 

 collection of oyster spat. From Winslow's Report on the Oyster 

 Beds of Tangier and Pokamoke Sounds.) 



Plates VIII and IX. — Upper and lower surfaces of 

 a tile which was removed on August 2, twenty-four 

 days after it had been placed in the water. 



Plates X and XI. — Upper and lower surfaces of a 

 tile which was removed on August 23, forty-five days 

 after it had been placed in the water. 



Plates XII and XIII. — Upper and lower surfaces 

 of a tile which was removed on October 10, about 

 three months after it had been placed in the water. 



