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- III 



Studies in the Morphology, Taxonomy, 

 and Ecology of the Peridiniales 



HERBERT W. GRAHAM 



CARNEGIE INSTITUTION OF WASHINGTON PUBLICATION 542 



WASHINGTON, D. C. 

 1942 



