United States Department of the Interior, Fred A. Seaton, Secretary 



Fish and Wildlife Service, Arnie J. Suomela, Commissioner 



Bureau of Comnnercial Fisheries, Donald L. McKernan, Director 



STUDY OF FOOD PREFERENCE AND RATE OF FEEDING 

 OF JAPANESE OYSTER DRILL, Ocinebra japonica (Dunker) 



by 

 Kenneth K. Chew 



United States Fish and Wildlife Service 

 Special Scientific Report--Fisheries No. 365 



Washington, D. C. 

 November I960 



