DEPARTMENT OF TERRESTRIAL MAGNETISM 



J. A. Fleming, Director 



Scientific Results of Cruise VII of the Carnegie during 1928-1929 

 under Command of Captain J. P. Ault 



BIOLOGY- V 



The Genus Ceratium in the Pacific 

 and North Atlantic Oceans 



HERBERT W. GRAHAM 

 NATALIA BRONIKOVSKY 



CARNEGIE INSTITUTION OF WASHINGTON PUBLICATION 565 



WASHINGTON, D. C. 

 1944 



