44 



Occurrence. Some few specimens of this form, all of the female sex, 

 were obtained some years ago at Ris0r in depths ranging from 50 to 100 

 fathoms, muddy bottom. 



34. Bradya furcaia, G. O. Sars, n. sp. 



(PI. XXVII, fig. 2). 



Specific Characters. Female. Body comparatively short and stout, 

 with the anterior division regularly elliptical in outline, the greatest width 

 occurring about in the middle. Cephalic segment about the length of the 

 exposed part of the trunk, and conspicuously contracted in its anterior part, 

 with the extremity, seen from above, narrowly truncated; rostral plate rather 

 deflexed. Urosome much narrower than the anterior division and about 

 equalling 2 /s of its length, tapering rapidly behind, posterior edges of the 

 segments distinctly spinulose. Caudal rarni unusually produced, attaining the 

 length of the last 2 segments combined, and rather divergent; apical setae 

 moderately slender. Anterior antennas short and stout, 6-articulate. Posterior 

 antennae and oral parts normal. Natatory legs with the rami rather unequal, 

 the inner one being much the longer, middle joint of this ramus fully as 

 large as the terminal one, and in the 2nd pair armed inside with a strong 

 spine in addition to the usual seta. Last pair of legs somewhat unlike those 

 in the other species, the distal joint being comparatively large and rounded 

 oval in form, with both the innermost and outermost setae very short; inner 

 expansion of proximal joint extending beyond the middle of the distal joint, 

 and having the 2 apical setae of nearly equal length. 



Body rather pellucid and of a whitish grey colour. 



Length of adult female 0.64 mm. 



Remarks. This is a well defined species, and may at once be recog- 

 nised by the unusually long and narrow caudal rami, a character which indeed 

 has given rise to the specific name here proposed. It also exhibits some well- 

 marked differences from the other species in the structural details, especially 

 as regards the structure of the last pair of legs. 



Occurrence. Two female specimens only of this form have as yet 

 come under my notice. They were taken at Riser from a depth of about 

 60 fathoms. 



