MATERIAL 



197 



In each of these species there are a few FurciUa that occur in much larger numbers 

 than the others; they are what were previously known as dominant forms. In each 

 they have the structural relationship to one another that Fraser (1936, p. 35) has 

 shown to be the essential one of dominant forms, proving them to be the members 

 of a series. They confirm Eraser's view that this part of Euphausian development has 

 an order that hitherto was unsuspected, and that it is therefore shorter than was 

 previously supposed. 



MATERIAL 



The collection upon which this report is based is a small part of that made by the 

 R.R.S. 'Discovery II' during her second commission, 1931-3. The stations made 

 during that time are shown in Eigs. 1-3. They include two sets of closely placed stations 

 in the Ealkland sector of the Antarctic, one made in each of the summer seasons 

 193 1-2 and 1932-3 (Figs, i and 2). A series of lines of stations crossing and re-crossing 



70° 



70° 60° 50° 40° 30° 20° 



Fig. 2. Chart showing positions of the stations made in the Falkland Sector in the summer of 1932-3. 

 The southernmost stations were along the edge of the pack-ice. 



