EUPHAUSIACEA OF THE BENGUELA CURRENT 



FIRST SURVEY, R.R.S. 'WILLIAM SCORESBY', MARCH 1950 



By Brian P. Boden 



(Text-figs. 1-24) 



ACKNOWLEDGEMENTS 



TH I s report was started while I was oceanographer on the staff of the Bermuda Biological Station 

 for Research Inc. My thanks go to the succession of directors the station had during this short 

 period for encouraging me to continue with the work at the expense of station duties. 



Dr T. lohn Hart, National Institute of Oceanography, performed the onerous task of preliminary 

 plankton sorting with his usual skill and patience 

 and sent the euphausiids to me in Bermuda. 



I am particularly indebted to several of the staff 

 of the Scripps Institution of Oceanography for their 

 critical reading of the manuscript and their numerous 

 suggestions. 



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INTRODUCTION 



The material upon which this report is based is 

 drawn from the collections made by R.R.S. 'William 

 Scoresby ' during her eighth commission and her first 

 survey of the Benguela Current off the coast of 

 South-West Africa. 



The stations occupied during this cruise are shown 

 in Fig. 1. The collections were made in March 1950. 

 The hauls were vertical and made with an N 70 

 closing-net of plankton silk of 70 meshes to the inch 

 and with a mouth diameter of 70 cm. 



Fourteen species were represented at these stations; 

 their occurrence is given on pp. 340-45. An overall 

 picture of distribution based on the results of a single 

 cruise may very well be misleading, and therefore the 

 counts are presented simply in tabular form and 

 efforts at interpretation are postponed until the results 

 of the second survey are available. Full station data 



may be obtained from the Discovery Reports, Station List, vol. xxvi. Descriptions of the South African 

 species as adults are to be found in Boden (1954). 



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Fig. 1 . Plan of stations at which euphausiids were taken 

 during the survey of the Benguela Current by R.R.S. 

 'William Scoresby', March 1950. 



