176 



COPEPODA 



The pes I (text-fig. 49 e) is scarcely different. The pes II differs distinctly by the Se Re II, which al- 

 most extends to the end of the fairly long Se i Re III, and by the long Se 2, which extends to the 

 tip of the segment and to the base of the Se 3. 



The anterior surface of the labrum shows an arrangement of the hairs most like that of E. Sarsi 

 (fig. 7 a). The oral surface is like that of E. Farrani; the lateral group consists of about 40 hairs, placed 

 inwards in two rows, and outwards in one; about the difference in the arrangement of the other 

 groups I refer to fig. 8 a. In the arrangement of the hairs on labial lobes etc. no features of great 

 interest were found. 



c?. Size of specimen from St. 183 was 7-37 mm.; anterior division 5-3 mm.; urosome 2"07 mm. 



The shape of the body is practically like that of E. norvegiea ; the rounded lateral corner is 

 more produced on the left side than on the right; the dorsal lateral process is more distinct on the 

 right side than on the left. The first abdominal somite has the dorsal process near the anterior border 

 prominent on the right side, and just indicated on the left (text-figs 49 f—g). The antenmilae reach 

 just beyond the end of the cephalothorax; the segments 12 — 13 being without any articular membrane 

 posteriorly on the left side, but with a fairly distinct articular membrane on the right side in some spec- 

 imens. No "^sthetasken" were found in segment 20. The segments 24^25 are I'l as long as segment 

 15. The antennae, mandibulae and maxillae scarcely show features of interest; the maxillulae have 8 

 setae in Ri, but do not differ from E. norv. in other respects. The maxilUpeds do not possess any 

 hooked process in the lob. IV of basipodite II, but 2 setae, of which the one is thicker. The Se of 

 Re I pes I is extremely short and delicate. The pes II differs by the short Se Re II, which does not 

 reach the middle of the third division. The pes Fdext. is scarcely different from E. norv.] it has a well 

 developed Se Re I, and trace of articular membrane between Re I and II. The pes Fsin. has the Re 

 II — III comparatively shorter than E. norv., and has the serrated process fairly pointed, rather shallow, 

 and with a few distal teeth, comparatively strong, as .shown in figure 8 b. The left endopodite is 

 rather clumsy and has only a single segment (text-fig. 49 i). 



Yg (St. V). Size: 6-14 mm.; anterior division 4-6 mm. ; urosome 1-54 mm. 



The lateral corner of the fifth thoracic somite, which is fairly well marked, is produced into a 

 rather blunt point. The first of the 4 abdominal somites is distinctly produced below in the females, 

 not in the single male. The appendages do not show features of great interest; the pes II is scarcely 

 different from that of the adult female. The pes V (text-fig. 49 1) is like that figured in E. tonsa, but 

 the St. are more developed. In a single female several of the furcal setae were more or less bifurcate 

 (text-figs 49 j — k). The two last abdominal somites bear ventrally groups of rather short hairs. 



Yq (St. IV). Size: 4-49 mm.; anterior division 3-39 mm.; urosome i-io mm. 



The lateral corners are sHghtly more pointed than in the preceding stage (text-fig. 49 m) ; the 

 first of the 3 abdominal somites is barely produced below; only a single tuft of hairs is observed 

 near the hinder border of the last abdominal somite ventrally. The appendages show differences similar 

 to those described in E. norv., f. inst, the segments 240^24 of the antennulae are 1-3 as long as the 

 segment 19 (text-fig. 49 n). 



Y (St. III). Size: 3-06 mm. ; anterior division 2-37 mm.; urosome 069 mm. 



