CRUISE 20 



3/9-4/2/53 



161° 



160° 



159° 158° 157° 



156° 



I 



CRUISE 21 



8/4-8/26/53 

 15 





161° 



160° 



159° 



I 



158° 



157° 



•l56° 



155° 



23° 



22° 



155° 154° 



154° 



21°- 



20° 



I9°- 



18° 



23° 



22°- 



21° 



20°- 



I9°- 



18»- 



Figure 6. --Variations in zooplankton abundance, based on time-adjusted 

 volunnes as cc. / 1000 m. , for two cruises of the Hugh M. Smith. 



8 



