﻿COI'lvPODA lyy 



Apart from tlic l)igger size and more .straight rostrum, tlie stage is scarcely different from that 

 of E. norvcgica (text-figs 49 o — p). 



Occurrence. The .S/S Tlior lias '■/,. 04 vSt. 183 6i°30 L.N. 17^08 L. W. Yt. i8(X) M. Wire taken 

 gf?, 2 fd", 4 y? (V), I yc? (V), 2 y? (IV), i yj- dVi, i y (III) and ■"/, 09 St. 180 6i''34 L, X. i9°03 L. W. 

 Yt. iSoo M.Wire i f?. 



Distribution. Remarks. About the distrilnitioii of this species only very little is known, as will 

 be understood from the following remarks. Ky Farrrau it has been recorded as occurring "in small 

 numbers on five stations of from 700 to 1000 fathoni.s" off the west coast of Ireland. As neither Sars nor 

 Scott says anything about the characteristic tubercle on the left side of the genital somite, and as their 

 descriptions are not very perfect, I do not think that we should be right in including the i\Iid Atlantic 

 and the Indian Ocean within the range of this species. Farran, with some reluctance, refers his .species 

 to B r a d y's old .species from 36° L. vS. 46' ly.W., on account of the corresponding size and similar structure of 

 pes II; Brady's figure of the genital protuberance and the smooth ventral surface of the abdominal somites 

 III — IV seems to me to .speak against the correctness of this view. The same opinion is shared bv Wolf- 

 enden, who regards E.barbata as more related to E. ll'ofiiiJii/// than to any other (cf. 1911, p. 300); as, 

 however, the name is now applied to a well defined species, and as there is no rea.son to hope for a 

 sure identification, I prefer to follow Farran in this respect. 



51. Euchaete Sarsi P'arrau. 

 (PL VI figs 7 a — b; te.xt-figs 50 a — f.| 



190S. Euchaete Sarsi 11. sp. Farran, p, 41, pi III fi,t;s 15—16. 

 1909? ^ — Farr. A. Scott pp. 75 76, pi, XXI figs 9 — 15. 



Description. 5. Size of specimen from St. 183 was 10 nun.; anterior division 7-3 mm.; urosome 

 27 mm. F'arran's specimens measured 98 — 10-2 mm. 



The shape of the body etc. scarcely show features of interest. The anterior division is 27 as 

 long as the urosome; the proportional length of the abdominal segments is 45, 27, 27. The genital 

 somite has not on the left side the characteristic tubercle found in E. Earnuii. and the ventral pro- 

 tuberance has the anterior process slightly concave in the middle, and the posterior process less 

 prominent than in the other species (text-figs 50 a — e). The vulva is in the ventral surface quite dif- 

 ferent from that of E. Farraiii and barbafa. The median chitinous plate has posteriorly a median 

 incision, Init the area in front is irregularly wrinkled, and the triangular plate is onh- indicated; the 

 trilobate process is very indistinct (text-fig. 50 f). The segment 19 of the antennulae is i-i as long as 

 24 cv 25. The Le of the inaxilhilac possess 2 extremely short and one longer seta proximally, and in addi- 

 tion to these the usual long ones distally. The pes I has a very short Se Re I. The Se of Re II extends 

 to the end of Se i Re III, and the Se 2 Re III extends somewhat beyond the middle of the third division. 



The anterior surface of the lubniin is distinctly different from that of P.. tiorv. and Fnrrani, as 

 realised by comparing fig. 7 a and the description of E. iiorv. The oral surface of the labrum is very 

 much like that of E. iioni. The lateral grou]) consists of 30 — 40 short spines; the groups 1—2 are placed 

 near to each other; the 3-5 are fairl\- well separated. The arrangement of hairs in front of lamina 



The Ingolf-Bxp(!(lition. III. 4. ^3 



