COPEPODA 



181 



"/ 7 1904 St. 183 6i°30 Iv. N. i7°o8 Iy. W. Yt. 1800 M. Wire 37 f? (3 with egg-balls, 2 with sperm.), 8 f<?, 



8y? (V), 4 y<? (V), iy? (IV). 

 2 V 5 1904 St. 104 62°47 k. N - I 5°°3 L. W. Yt. 1500 M. Wire 4 f ?. 



This species has previously been gathered off the west coast of Ireland "at depths of from 700 

 to 1000 fathoms" at five stations "but very few specimens were found on each occasion". Wol fen den's 

 specimens, which on account of the different shape of the genital somite (PI. XXXV fig. 3) cannot with 

 security be referred to the same species, were gathered under the equator ca. 20 Iv. W. (depth 3000 m.) 



53. Euchaete Hansenii n. sp. 



(Text-figs 52 a — b.) 



Description. Size: 8-9 mm.; anterior division 6-5 mm.; urosome 2-4 mm. 



The shape of the body is like that of E. norvegica. The anterior division is 27 as long as the 

 urosome, which is only a little longer than the width of the thorax. The proportional length of the 

 abdominal somites is 45, 26, 25. The genital somite is, laterally, more suddenly convex than in E. Sarsi, 

 and, as in this, the greatest width lies in the proximal part; the genital somite is 13 as long as 

 wide, but only 17 as long as deep. 

 The lateral conical process which 

 characterises E. barbata and Far rani, 

 is wanting. In lateral view the geni- 

 tal protuberance differs distinctly 

 from that of E. Sarsi by the straight, 

 not concave, anterior process, and by 

 a fairly distinct process behind and 

 above the second one, sometimes 

 indicated in E. Sarsi, which, as usu- 

 ally, represents the posterior border 

 of the vulva. The ventral surface 

 is quite different; the triangular 

 plate in front is divided into three 

 processes; the transverse plate has 

 posteriorly a median incision, on each 

 side of which are two lobes (text-figs 

 52 a — b). — The antennulae scarcely extend to the end of the cephalo-thorax ; the appendages are 

 scarcely different from those of E. norvegica; the segment 19 is ri as long as the segments 240^25. 

 The maxillulae possess in L,e 1 two basal, fairly long and slender, setae, followed by 6 powerful seta 

 and one terminal somewhat shorter one; the Basip. has 5, the Ri I 3, Ri II 4 and the Ri III 3 setae. 

 The articular membrane between Re I— II is barely indicated, and the Se is long and slender. The Se 

 of Re I is fairly long, and extends almost to the base of Se 1 Re III, and the Se 2 Re III extends to 

 the base of Se 3. 



Text-fig. 52. Euchcete Hansenii n. sp. 

 a. f<?. Abdomen X 16. t>- Vulva in ventral view X 180. 



