148 



DISCOVERY REPORTS 



propinquus replaces Rhincalanus as the dominant copepod and the Chaetognatha 

 diminish towards the north instead of increasing. The distribution of the plankton, 

 however, seems to be quite uniform. In the 1930-1 line Sts. 637 and 636 are evidently 

 in the area of thin plankton. At Sts. 635, 634 and 633, however, Rhincalanus is again 

 dominant, Calanus acutus appears in moderate numbers, Limacina and the Chaeto- 

 gnatha increase towards the north and Parathemisto is evenly distributed in small 

 numbers. The other species mostly increase towards the convergence, but the increase 

 is in proportion to the increase in the total number of organisms, and the plankton here 

 can be regarded actually as very uniform. 



Finally, there are eight lines of stations lying between South Georgia and the Falk- 

 land Islands. These are shown in Table XVII and their positions in Figs. 10, 1 1, 12, 14. 



