298 



DISCOVERY REPORTS 



middle of February a line of four stations was taken between the Falkland Islands and 

 South Georgia (Fig. i b). In this area a diminution in numbers is found compared with 

 the conditions at the beginning of December (cf. Figs. 8, 10). This decrease, however, 

 is very much more striking on the Falkland or sub-Antarctic side of the convergence 

 than on the South Georgia or Antarctic side. On the sub-Antarctic side Sts. 828 and 



Fig. 10. Horizontal distribution of Rliincalanus gigas in the Falkland Sector of the Antarctic, mid-January 

 to February 1932. (i-m. nets, 250-100 m. approx. and loo-o m. approx., both hauls combined.) Numbers 

 represent hundreds of individuals. 



829 in February may be best compared with Sts. 750 and 751 at the end of November 

 and the beginning of December: 



On the Antarctic side of the convergence the catches at Sts. 830 and 831 still amounted 

 in February to more than 8000 individuals in the two hauls combined. It is evident that 

 at the end of the season 193 1-2 the Antarctic convergence formed a barrier to the dis- 

 tribution of Rhincalanus and limited its extension into the sub-Antarctic Zone much 

 more strictly than in November and December, when the species was found in abund- 



