!8o COPEPODA 



the L,e of the maxillulae possess 5 long -(- 2 shorter setae. This is in contrast to Wo If en den, who has 

 only found 5 setae in his specimens. The articular membrane between Re I — II of pes I is barely in- 

 dicated, and the Se is, as pointed out by Wolfenden and Farran, extremely minute. The pes II is 

 like Farran's description; the Se Re II almost extends to the end of Se 1 Re III, and the Se 2 Re III 

 extends a little beyond the middle of the third division; in most of Wolf enden's specimens the Se 2 

 reaches the end of the segment. 



The anterior surface of the labrum is in the arrangement of the setae scarcely different from 

 E. Sarsi (fig. 7 a); the oral surface is most like that of E. norvegica (fig. 10 a); the lateral group consists 

 of about 10 fairly long, densely placed, setae. The first group of the longitudinal series, which is some- 

 what convex in front, is connected with group 2, which possesses fairly long setae, by delicate hairs 

 scattered inwards and outwards; groups 3—6 are fairly well separated, without difference between outer 

 and inner portion. The arrangement of the hairs on the area in front of the lamina labialis (fig. 10 b) 

 is in the main like that of E. norvegica, but shows, however, as realised by comparing figures, distinct 

 difference; the lateral group, f. inst, is almost completely fused with the median. 



o*. Size of specimen from St. 183 was 5-56 mm.; anterior division 3-93 mm.; urosome 1-63 mm. 



The shape of the body is more clumsy than in E. ?iorvegica; the anterior division is only 2*5 

 as long as wide, and 2*4 as long as the abdomen, the first somite of which is about n as long as 

 broad. The left side of the thorax is distinctly produced, and the dorsal lateral spine is represented 

 by a minute rounded eminence; on the right side no lateral spine is found (text-fig. 51 f). The dorsal 

 lateral process of the first abdominal somite is, as usually, best developed on the right side, but is not 

 very prominent. The antennulae extend distinctly beyond the end of the cephalo-thorax ; segments 12 — 13 

 have no articular membrane posteriorly; the segment 19 is 1-9 as long as 240025; no "^sthetask" was 

 found in segment 20. The lob. IV of the Basp. II of the maxillipeds has in addition to a fairly long 

 slender seta a moderately long hairy process and a rather small conical protuberance; the other mouth- 

 limbs are scarcely different from those of the type-species. The pes I has an extremely short Se in Re I ; 

 the pes II is like that of E. barbata. 



The pes V is shorter and more clumsy than in the mentioned species; the Re I — II pes V sin. 

 are most like the corresponding segments in E. barbata (fig. 10 c); the serrated process is narrow with 

 regular marginal serration. 



Y^ (St. V). Size of °. from St. 183 was 4-83 mm.; anterior division 3-63; urosome 1-2 mm. $ 

 (St. 183) measured 4-54 mm. 



The shape of the body is, as in the adult specimens, more clumsy than the corresponding stages 

 of the related species. The lateral corner is, as shown in figure, triangularly, but obtusely, pointed. The 

 Se of the Re I pes I is comparatively long and slender. The females examined are distinctly different 

 from the male by the produced lower margin of the first somite; the pes V does not show characters 

 of great interest (text-figs 51 g— j). 



Y$ (St. IV). Size of specimen from St. 183 was 3-34 mm.; anterior division 2*48 mm.; urosome 

 o-86 mm. 



This stage differs from corresponding stage in related species by an obtusely pointed lateral corner. 



Occurrence. The Thor Expedition has gathered this species at two stations only viz: 





