208 



DISCOVERY REPORTS 



Euphausia lucens. This species was taken at only one station, St. 47, approaching the 

 Falkland Islands well across the line of Antarctic Convergence (see Fig. 14), where 

 forty-three males and thirty-six females were taken in a surface N 100 H net. 



Table XXVIII 

 The depth distribution of E. frigida furcilia as shown by the N 70 V nets 



Table XXIX 

 The depth distribution of E. frigida calyptopis* as shown by the N 70 V nets 



* The numbers are too small for separate treatment of day and night hauls. 



Euphausia superba, Dana. Numerically this species is by far the most important 

 member of the order in this area; indeed, one is tempted to believe that ecologically it 

 is the most important zooplankton organism of the Antarctic. Its importance has been 

 recognized for many years. Hansen (1908) writes that "£. superba, established in 

 1852, seems to live everywhere in the Antarctic Ocean as it has been taken by every 

 expedition touching or exploring any part of those seas". Tattersall (1913) writes 

 that "it is the Euphausian ' par excellence' of the Antarctic Ocean. It is circum-polar 

 in distribution and has been recorded by all the recent expeditions that have visited 

 those waters. It likewise forms the major part of the food of the crab-eating seal 

 {Lobodon carcinophaga) and of certain of the penguins". The Australian Antarctic 

 Expedition 1 found it in the stomachs of the Weddell Seal (Leptonychotes weddelli) 

 and Emperor Penguin (Aptenodytesforsteri). Rustad (19306) writing of his voyage in the 



1 Tattersall (1918). 



