178 



COPEPODA 



labialis is most similar to that of E. Scotti (fig. lob); the large lateral group is almost completely fused 

 with the median, which, however, has longer hairs. 



c?. Size : 8-3 mm. ; anterior division 5-5 mm. ; urosome 2 - 8 mm. 



The rostrum is directed more forwards than in E. barbata Brady; the lateral dorsal teeth of 

 the last thoracic tergite are only slightly developed. The antennulae extend distinctly beyond the end 

 of the cephalo-thorax; the segment 20 has a well developed "^Esthetask"; in other respects these organs 

 are scarcely different from those of E. barbata. The maxillipcds have in the lobe IV of Basp. II a well 

 developed, rather slender, hairy conical process, which terminally is produced into a delicate lash. The Se 

 of Re I pes I is wanting. The pes II is practically like that of E. barbata. The pcs V dext. is scarcely 

 different from that of E. barbata ; the pes V sin. is in most respects like that of the other species ; 



Text-fig. 50. Euchcete Sarsi Farran f9- 

 a e. Abdomen of different specimens X 16. f. Vulva in ventral view X iSo- 



the differences are best realised by comparing figs yb and 8b; the best character is found in the ser- 

 rated process which is more slender, and has a less regular serration. 



Occurrence. The S/S Thor has taken this species at the following deep sea stations. 



"/ 7 1904 St. 183 6i30 L. N. I7o8 L. W. Yt. 1800 M.Wire 3 f ?. 

 IO / 7 1904 St. 180 6i34 L. N. i9c>3 L. W. Yt. 1800 M.Wire i f?. 

 3'/8 1905 St. 167 5746 L. N. 955 L. W. Yt. 1500 M.Wire i fd 1 . 



Farran has recorded this species from three deep sea stations off the west coast of Ireland. 



Remarks. That the described females are identical with E. Sarsi Farran, I regard as quite evi- 

 dent; in contrast to Farran I do not regard it as identical with Wolf enden's E. barbata (cf. p. 174). The 

 described male is certainly different from that which has been referred to E. barbata, and belongs cer- 

 tainly to E. Sarsi or another species of similar size nearly related to it. I do not think that the male, 

 which A. Scott refers to E. Sarsi is identical with the described one, on account of the well developed 

 lateral dorsal teeth of the fifth thoracic tergite and the different shape of the serrated process. 



