UNITED STATES DEPARTMENT OF THE INTERIOR, Douglas McKay, Secretary 

 FISH AND WILDLIFE SERVICE, John L. Farley, Director 



PHOSPHORUS EXCHANGE IN MARINE 

 PHYTOPLANKTON 



By Theodore R. Rice 



FISHERY BULLETIN 80 



From Fishery Bulletin of the Fish and Wildlife Service 



VOLUME 54 



UNITED STATES GOVERNMENT PRINTING OFFICE • WASHINGTON : 1953 



For sale by the Superintendent of Documents, U. S. Government Printing Office, Washington 25, D. C. 



Price 15 cents 



