41 



of the plankton-samples taken during the cruise of the "Michael Sars" in 1900, 

 two of which were from the Norwegian Sea, the one (St. 9) ahout midway between 

 Iceland and Norway, the other farther north, at some distance east of Jan Mayen, 

 the depth at the first-named Station being recorded to be from 200 to 400 metres, 

 at the last-named from 500 to 1000 metres. 



Distribution. The Kara Sea (Hansen), Polar basin crossed by Nansen, 

 rather abundant in many places, from 300 metres up to the very surface of the 

 sea (the present author). 



17. Euchaeta barbata, Brady. 



(PI. XXVIII). 



Euchceta barbata, Brady. Report on the Copepoda of the Challenger Expedition, 

 p. 66, PL XXII, figs. 612. 



Syn: Euchceta norvegica, G. 0. Sars (part). 



Specific Characters. Female. General form of body closely resembling 

 that of E. glacialis. Cephalosome wholly coalesced with the 1st pedigerous seg- 

 ment, rostrum as in the 2 preceding species ; epistomal protuberance very densely 

 hirsute. Lateral corners of last segment of metasome broadly rounded off and 

 densely hairy below. Urosome not nearly attaining half the length of the anterior 

 division, genital protuberance comparatively less prominent than in the 2 preceding 

 species, and issuing from the anterior part of the segment, apical lobules very unequal, 

 the anterior ones being much larger than the posterior and recurved in a beaklike 

 manner. Outer caudal segments densely clothed with hairs, which, especially on 

 the ventral face, are rather long and to some extent arranged in fascicles. Caudal 

 rami comparatively short and likewise densely hairy on both edges; innermost 

 but one of the caudal setae almost twice as long as the others; appendicular 

 bristle, as in E. norvegica, very much elongated, and distinctly geniculate at the 

 base. Antennae, oral parts, and legs scarcely differing in their structure from 

 those parts in the 2 preceding species. 



Male exhibiting the same differences from the female as in the 2 

 preceding species. Hand of left last leg, however, somewhat different, the thumb 

 not being produced at the end, but coarsely denticulated along the inner edge, 

 2 of the denticles larger than the others, dactylus as in the 2 preceding species, 

 appendicular lobe, however, narrower, cylindric in form and hamiformly curved 

 at the tip. 



Colour bright red. 



Length of adult female reaching to 12 mm., of male to 10 mm, 



