170° 



165° 



160° 



155° 



25° 



20° 



15° 



10° 



25° 



20° 



10' 



170° 



165° 



160° 



155° 



Figure 3. --Plankton-station positions of Hugh M. Smith cruise 26 (May - June 1954). 



1 T" 



\KAUAI 



/ 



-16 



-15 



_L 



161' 



_1_ 



160° 



_L 



159° 



158° 



_L 



1 \ \ \ r 



MOLOKAI 

 CI ^^ 



22°- 



21° 



HAWAII 



157° 



I 



_L 



Figure 4. --General locality of stations A, B. C, and D visited repeatedly on Charles 

 H. Gilbert cruises 11, 12, and 13 (April - June 1953), and Hugh M. Smith cruises 

 21, 22, 23, and 24 (August - December 1953); plankton hauls were made at station 

 B only on Hugh M. Smith cruise 21. Also shown are positions (-) of plankton sta- 

 tions 15 and 16 of Charles H. Gilbert cruise 16 (August 1954). 



