1248 



BUI^IvETlN OF THE BUREAU OF FISHERIES. 



^^bva rd 



Fig. 12. — Showing localities at which the oyster. Ostrea virginica, or its shells, were taken. This is a good example of a 

 sptirious distribution pattern, since the shells in the main channel of Vineyard Sound were doubtless thrown over- 

 board from passing vessels. 



