Eeport U. S. F. C. 1884.— Horst. Oysters. 



PLATE II. 



Fig. 6. 



Fir,. 7. 



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Fiff 11 



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,<\\\\ 



FLg -77 



Fvg. 112. 



Tiff. 13. 





a O r, r- rj- -" 



Fig. ^8. 











Fxg 1.0. 



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