

jyg COPEPODA 



49. Euchaete Farrani n. sp. 



(PI. VI fig. 6 a; text-figs 48 a— d.) 



1883. nee. Euchsete barbata n. sp. Brady, p. 66, pi. 22 figs 



6—12. 



1892. nee. Brady. Giesbrecht, p. 246. 



1894. nee. — Th. Scott, p. 58, pi. VI fig. 17. 



1898. nee. — Giesbrecht &Schmeil, p. 40. 



1900. pars. — norvegica Boeck. G. O. Sars, p. 234, pi. 19. 



1903. barbata Brady. G.O.Sars, p.4i,pl.XXVIII. 



1904. pars. — Wolfenden, p. 135. 



1906. nee. Euchsete barbata Brady. Pearson, p. 17. 



1907. — — Damas & Koefoed, p. 409. 



1907. nee. — — G. O. Sars, p. 3. 



1908. pars. — — v. Bremen, pp. 54 — 55. 



1909. nee. Pareuchsete barbata Brady. A. Scott, p. 70, pi. XVIII 



figs 1 — 8. 

 1909. nee. Sarsi Farran. A. Scott, pp. 75 — 76, pi. 



XXI figs 9-15. 



Description. f$. Size of specimen from Thor St. 230 was 1075 mm.; anterior division 8 mm.; 

 urosome 275 mm. Sars' specimens measured 12 mm. 



The shape of the body is scarcely different from Sars' figure; the anterior division, which has 

 a rounded lateral corner with a tuft of long hairs, is 2*5 as long as the urosome. On the ventral surface 

 of the third to fifth abdominal somites tufts of powerful hairs are found. The comparative length be- 

 tween the 3 first somites is as 50, 30, 25. 



The ge7tital somite (text-figs 48 a— c), which is i'2 as long as wide and ri as long as deep, is al- 

 most as long as the following two combined; the ventral surface has a big protuberance for the vulva, 

 placed almost in the middle of the somite. In lateral view the ventral outline is anteriorly rounded, 

 in the middle almost straight, and posteriorly produced into a somewhat triangular process, which by 

 an incision is well separated from a "posterior process", which really is the posterior limitation of the 

 vulva; this posterior process is basally marked by an incision. Somewhat more posteriorly and dorsally 

 than the base of the genital protuberance on the left side a small rounded process is found; this 

 process has been found in all the examined specimens, and is best seen when the somite is examined 

 in not quite lateral view. In ventral view the vulva is seen to be limited by a slightly prominent edge 

 behind; laterally it is partly covered by a wing-like expansion, which is rounded in front, and pro- 

 duced behind. In the middle of the vulva a chitinous "plate" is found, which in the posterior margin 

 has a median incision, laterally is partly fused and covered by a somewhat trilobated process, and in 

 front is in the middle covered by a posteriorly triangularly pointed plate. The St. 2 of the furca is 

 almost twice as long as the St. 1 — 4, but much shorter than the distinctly geniculate Si. 



The antennulae, antennae, mandibulae, maxillae and maxillipeds do not show any feature of 





the Faeroe channel, and only once it occurred in the warm Atlantic area", and according to Damas 

 & Koefoed "entre les Fseroer et l'Islande: pas au dessus de 400 metres" (p. 408). 



My own records show that the species was fairly common in the ocean north of Iceland, and 

 in Denmark Strait; it has been found a few times in the Iceland — Fseroe channel and a single 

 time south-east of the Faeroes. It is rather odd that it has not been taken in Davis Strait, but as 

 comparatively few deep sea samples have been examined from this region it is too early to exclude 

 the species from the fauna of this region. As it never occurred in any of the numerous samples brought 

 home by Thor and the Ingolf Exp. from the Atlantic soutb of Iceland, we are probably right in ex- 

 cluding it from the ordinary fauna of this region. 









