2o8 DISCOVERY REPORTS 



protruding for a longer or a shorter way up into these processes ; one such is shown 

 in Fig. 9 b. 



In his report on a collection of Schizopoda from the tropical Pacific, which contained 

 no E. lucens, Hansen (1912, p. 230) in discussing the male copulatory organ of the genus 

 Eiiphaiisio says: "The spine-shaped process is wanting (yet I found this process de- 



Fig. 9. a, E. liicem, median lobe of the left copulatory organ of a male from in front, x 67. b, Thysanoessa 

 vicina, terminal proximal and lateral processes of the left copulatory organ of a male from behind, x 266. 

 Both figures show the rudiments of the processes of the succeeding moult at the bases of the existing 

 processes. 



veloped in the normal way in one of the specimens examined of E. lucens)." I have 

 found no reference to this in any other work by Hansen, nor have I ever seen the spine- 

 shaped process in E. lucens. 



Distribution. The stations at which E. lucens was taken are shown in Figs. 10 and 1 1 . 

 It occurs constantly in all but the coldest water of the sub-Antarctic Zone, though it 

 may occur in that too as far south as the Antarctic convergence. It has never been. taken 

 south of the convergence. It occurs also in a narrow belt of the coldest water of the sub- 

 tropical Zone just north of the subtropical convergence. 



Of the stations at which it was taken the three south-east of the Cape had the highest 

 surface temperatures, that of the first of them, 20-1° C, being the highest. This is 

 warmer water than they are usually found in, and their presence in it is accounted for by 

 the shape of the subtropical convergence in this region. To the west of the Cape it lies in 

 37° S, but to the south of it the Agulhas Current causes it to bend sharply southwards. 

 Its position varies more here than elsewhere (except perhaps south of the Brazil Current), 

 and a mixing of sub-Antarctic and subtropical waters takes place throughout a large 

 area. But the area would not include the northernmost two of the three stations at which 

 E. lucens occurred. Although they were far from the convergence to the south they were 



