150° 



180° 



120° 



LEGEND 



o JAN., FEB., MAR. 

 A APR., MAY, JUNE 

 + JULY, AUG., SEPT. 

 • OCT., NOV., DEC. 



EACH SYMBOL REPRE- 

 SENTS ONE DISPLAY 

 REPORT. 



120° 



150° 



FIGURE 4 SEASONAL DISTRIBUTION OF BIOLUMINESCENT DISPLAYS, NORTH 

 PACIFIC OCEAN AND ADJACENT SEAS 



25 



