116 



the metasome, dorsal face considerably vaulted, rostral projection somewhat pro- 

 minent, and having in front 2 dentiform ledges. Lateral parts of last segment 

 of metasome obtusely rounded. Urosome slightly exceeding half the length of 

 the anterior division, genital segment bulging considerably below. Caudal rami 

 comparatively small, shorter than the anal segment, outermost seta occurring in 

 about the middle of the outer edge. Anterior antennae, when reflexed, reaching 

 beyond the middle of the 2nd caudal segment, dentiform projections of the prox- 

 imal joints comparatively small and not recurved. Last pair of legs distinctly 

 4-articulate, terminal joint lamellarly dilated and oval in form, being finely ciliated 

 on both edges and armed at the tip with 3 seta3, the outer 2 rather short, the 

 innermost very slender and elongated, extending obliquely inwards. 



Male much smaller than female and of more slender form, with the uro- 

 some perfectly symmetrical and very narrow, 2nd and 3rd segment partly hairy 

 outside. Left anterior antenna distinctly geniculate, and having the sensory 

 appendages of the proximal joints very large. Second pair of legs with the inner 

 ramus of same structure on both sides, and agreeing with that in the female. Last 

 pair of legs very asymmetrical, right leg much the larger and having the terminal 

 joint considerably dilated, securiform, that of left leg much narrower, oblong. 



Colour not yet ascertained. 



Length of adult female 4.30 mm., of male 3.50 mm. 



Remarks. This species has been briefly mentioned by Dr. F. Dahl in 

 the above-quoted Journal; but no detailed description or figures have as yet 

 been published. I think, however, that I am right in identifying the present form 

 with Dahl's species, as it seems to agree pretty well with it both in size and in 

 some of the anatomical details mentioned by that author. 



Occurrence. Some few specimens of this handsome species were found 

 in a plankton-sample taken during the cruise of the "Michael Sars" in 1900, at 

 Stat. 9, located somewhat North of the Faroe Islands, the depth being recorded 

 to be from 200 to 400 metres. A single female specimen also occurred in another 

 plankton-sample taken during the same cruise in the Storfjord, inland from 

 Aalesund (Stat. 4), its occurrence here evidently proving this form to be a true 

 member of the Norwegian fauna. 



Distribution. Atlantic Ocean in depths from 100 to 1500 meters (Dahl), 

 Faroe Channel, West of Ireland (Norman's collection) l ). 



Determined by the present author. 



