ILLUSTRATIONS 



FIGURE Page 

 Frontispiece: The main or high islands of the Hawaiian Archipelago. 



1. Plankton- station positions of Hugh M. Smith cruise 20 3 



2. Plankton- station positions of Hugh M. Smith cruise 21 4 



3. Plankton- station positions of Hugh M. Smith cruise 26 5 



4. General locality of stations A, B, C, and D visited repeatedly 5 



5. Dynamic height anomalies, Hugh M. Smith cruise 21. 7 



6. Variations in zooplankton abundance for two cruises of the Hugh M. Smith 8 



7. Mean zooplankton volumes by cruise for each month of sampling 10 



8. Monthly variation in zooplankton abundance, surface temperature, and skipjack catch. . 11 



9. Variations in environmental factors and zooplankton abundance at stations A and D. . . 13 

 10. Variations in temperature and zooplankton at station D 14 



