﻿i68 



COPEPODA 



Yq (St. V). Size of specimen from Thor St. 82 1904 was 4-42 mm.; anterior division (2-07 + i'23) 

 = 3-3; nrosome ri2 mm. 



The body is somewhat more slender; the first abdominal somite is in some specimens rather 

 prominent ventrally; the lower surfaces of two last abdominal somites possess tufts of the fairly long hairs 

 sometimes represented in E. norv. The lateral corner of the thorax is less acutely pointed than in E. norv. 

 (text-fig. 46 e). The pes I has no articular membrane between Re I — II, and the Se I is extremely short; 

 the pes II is scarcely different from the adult females. The male only differs from the female by the 

 presence of a well developed fifth pair of legs; the Re sin. is rather obtusely truncate (text-fig. 46 g). 



Yq (St. IV). Size of c? — $ from St. 88 Thor 1905 was 3-34 mm.; anterior division (1-56 + 0-90) 

 = 2'46; urosome o-88 mm. ; male from St. 82 3'28 mm. and female 3-54 mm. 



The body is more slender than in corresponding stage in E. norvcgica^ and the lateral corners 

 are less distinctly pointed. The Se 2 of Re II i>^ III in the pes II almost reaches the base of Se 3 in 

 contrast to E. norvcgica. The pes V of the male is scarcely different from that of the other species. 



Variation. A young male (St. 82) (text-figs 46 e — f) had, as shown in fig., the fifth pair of legs 

 developed in a rather curious way; in another specimen the left lateral corner was evenly rounded, 

 but the right one pointed in the usual wa\'. 



Occurrence. The Thor Expedition has taken the species from the following stations in the 

 Atlantic south of Iceland (one west of Iceland), all in fairly deep layers. 



"/? 1904 St. 183 6i°30 L. N. i7''o8 I^. W. Yt. 1800 M. Wire i fc?, 4 f? (egg-balls | sperm.). 



^Ve 1904 St. 154 67°27 L. N. 27°io L. W. i f?. 



•5/6 1905 SL 82 5i°oo Iv. N. 11^43 Iv.W. Yl 1200 M. Wire 11 f? (2 with sperm.), 2 ? (V), 6 ^ (V), 2 ? 



(IV), 4 c? (IV). 

 31/8 1905 St. 167 57°46 L.N. 9°55 L. W. Yt. 1500 M. Wire i f? (.sperm.), 1 c? (IV). 



76 1905 SL 72 57°52 L.N. 9°53 L. W. Yt. 1500 M. Wire 4 f?. 



^% 1905 St. 88 48°09 L. N. 8=30 L. W. Yt. 300 M. Wire 2 f ?, i ? (V), i c? (V), i ? (I\'), i d* (IV). 



Distribution. This species, or a nearly related, somewhat larger one, was recorded from the 

 Pacific by Giesbrecht and P^sterly between 150 and Tpa fathoms (1912, p. 321); it was gathered at 

 several stations in Malay waters by the Siboga Expedition. The Gauss Expedition has gathered the 

 species at two stations in the South Atlantic (c. 35° L. S. c. 10° L. W.), and at two stations in the Mid 

 Atlantic. On the west coast of Ireland it i.s, according to Far ran, "a rather characteristic .species in 

 deep water tow-nettings ranging from 400 — 1000 fathoms". 



Remarlis. That the described female is identical with that mentioned by Farr an and Wolf e nden 

 is .scarcely doubtful. Farran's specimens measured 4-95 — 5-25 mm., Wolfenden's specimens measured 

 5 — 5'3 """• The specimens from the Pacific are a good deal larger (Giesbrecht's 6-i, Esterly's 6-i and 

 Scott's 7 mm.), but as my adult females from the North-Atlantic measured up to 6-4 mm., the character 

 found in size is scarcely of great importance. The only character in which my specimens seem to 

 differ from Scott's etc. is the more pointed lateral corners and the structure of pes I —II, especially 

 the long Se 2 of Re III pes II. At present I do not deem these characters important enough to 

 establish two species. 



