COPEPODA 



125 



DREPANOPUS 

 PECTINATUS 



PAREUCHAETA 

 ANTARCTICA 



SCOLECI- 



THRICELLA 



MINOR 



METRIDIA 

 GERLACHEI 



METRIDIA 

 LUCEN5 



OITHONA 

 FRIEIDA 



* 



SHALLOW WATER STATIONS 







100 



250 



UJ 



5 



2 500 



750 



1000 



* 



m 



m 



DEEP WATER STATIONS 



10 ?0 30 40 

 SCALE I I I I I %PER 50 M. DEPTH 

 •^£ = INSUFFICIENT NUMBER5 (n) = NUMBER OF STATIONS FROM WHICH 



AVERAGE PERCENTAGES ARE TAKEN 



Fig. 56. Continuation of Fig. 55. 



66° S. In our area we see it taken in very large numbers as far north as 46° S., far across 

 the line of the Antarctic Convergence. 



Its seasonal distribution may be gauged, only on the slender material available, by 

 comparing the C line of five stations taken in November 1926, December 1926, March 

 1926 and again in May 1927, when the average numbers per 50 m. haul with the 

 N 70 V net in the top 250 m. for each season are 5, 105, 143 and 69 respectively. We see 

 a rapid increase in summer from a small spring population, and a falling off in the 

 autumn. 



Its vertical distribution round South Georgia is shown in Fig. 61, and that approach- 

 ing South Georgia from the north-east in February 1926, and between South Georgia 

 and the Falkland Islands in Fig. 62. It was usually most abundant in the top 100 m., 

 but St. WS 67, between South Georgia and the Falkland Islands, shows a marked 

 exception when large numbers were taken between 1000 and 750 m., and very few in 

 the water above this depth. Its mean vertical distribution at deep-water stations is 

 shown in Fig. 55. The species showed indications of diurnal vertical migration; this 



is further discussed on p. 234 and illustrated in Figs. 103 and 106. 



17 



