CONTENTS 



Page 



Introduction ^ 



Materials and methods 1 



Results 8 



Distribution of G. breve by area and time 8 



1954 8 



1955 8 



1956 8 



1957 9 



Occurrence of G^. breve in relation to salinity and temperature .... 9 



Vertical dispersion 9 



Discussion 9 



Sunnmary 14 



Acknowledgment 15 



Literature cited 15 



