39 



Posterior antennae with the outer ramus unusually fully developed, exceeding 

 'considerably in length the inner, and composed of 3 well defined joints, the 

 middle one the smallest, apical spines rather elongated and coarsely spinulose 

 at the one edge. Posterior maxillipeds of simpler structure than in the other 

 species, being only composed of 2 joints, the distal one the longer and car- 

 rying at the tip 2 unequal setae. The remaining oral parts apparently normal. 

 Natatory legs powerfully developed, with the basal part thick and muscular, 

 rami comparatively slender. Last pair of legs rather unlike in shape those in 

 the other known species, the distal joint being considerably produced, with 

 the outer part narrow sublinear in form and distinctly ciliated inside, outer- 

 most lobe far remote from the other 2 and occurring near the base of the 

 joint; marginal setae comparatively slender, the middle one being, as usual, 

 the longest; appendicular bristle attached close to the base of the joint and 

 accompanied by a transverse row of small spinules; inner expansion of proximal 

 joint rather produced, extending beyond the middle of the distal joint and 

 distinctly ciliated inside, apical setae slender and somewhat unequal in length. 



Colour of the living animal not yet ascertained. 



Length of adult female 0.50 mm. 



Remarks. This is a very distinct and easily recognisable species, 

 especially distinguished by the unusually large size of the outer ramus of the 

 posterior antennae and the peculiar shape of the last pair of legs. The struc- 

 ture of the posterior maxillipeds also is rather unlike that found in the other 

 species of the present genus. 



Occurrence. A solitary female specimen only of this interesting species 

 has as yet come under my notice. It was found in a sample taken, many 

 years ago, at Bejan, outside the Trondhjem Fjord, from a depth of about 30 

 fathoms. 



30. Pseudpbradya pygmasa, G. O. Sars, n. sp. 



(PI. XXIV, fig. 3). 



Specific Characters. Female. Body moderately slender and of the 

 usual subfusiform shape. Cephalic segment about occupying half the length 

 of the anterior division and gradually tapered in front; rostral plate not much 

 prominent and acute at the tip. Urosome about equalling in length 2 /s of the 

 anterior division and rapidly tapered behind; genital segment comparatively 

 large, equalling in length the 2 succeeding segments combined. Caudal rami 

 scarcely longer than the anal segment; apical setae rather slender. Anterior 

 antennae short and stout, 6-articulate. Posterior antennae with the outer ramus 



