Plate XI. 



OUTLINES OF ORGANISMS CONSTITUTING FOOD OF MATAGORDA BAY OYSTERS 

 Magnification 1,000. 



• i i inodiscus Iini 

 uini discus excenl 

 3. Melosira distans. 

 i. Navicula didvma. 



Ira sp. 



i Vi\ i: ui-i : liipti: ) 

 , . Synedra commutata. 



