366 



DISCOVERY REPORTS 



30° 



o o 



• I-IOO 





® lOO-I.OOO 



(^ 1,000-10,000 





10.000-100,000 



■ - r' ■/■/■: • 



'ir 



I 



VJ 



ISO" 



W180°E 



150° 



Fig. 115. Distribution of the massed surface larvae in winter. Ice-edge July- August mean. 



