Text table 3, — Average monthly plankton volumes in the area off 

 southern California and adjacent northern Baja California (sta. 

 lines 80-107) for the months of February through July, 1951-57, 



Text table 4, — Average monthly plankton volumes in the area off 

 central Baja California (sta, lines 110-137) for the months 

 of February through July, 1951-57, 



Year February March April May June July 



* - Volumes for 1957 are underlined when they are either the highest 

 or lowest in the series of seven years. 



8 



