32 



3-articulate. Oral parts, as in the other species of the present genus, rather 

 feebly developed. Natatory legs with the rami moderately slender, the inner 

 one in 1st pair somewhat longer than the outer, in the succeeding pairs of 

 about same length, 1st joint of this ramus wanting the usual seta inside, but 

 produced at the end to a sharp corner; 2nd joint of same ramus armed in the 

 2 middle pairs with a well-marked spine inside in addition to the seta. Last 

 pair of legs largely developed, with the distal joint spatulate in form and 

 divided at the end into 3 nearly equal, digitiform lobes separated by deep 

 incisions and clothed with slender spinules, each lobe carrying a well developed 

 seta, that of the middle lobe being, as usual, the longest and extending almost 

 to the end of the 2nd caudal segment, innermost seta shorter than the other 2, 

 but considerably coarser, almost spiniform; appendicular bristle well deweloped 

 and attached near the base of the joint, being accompanied with a transverse row 

 of small spinules; inner expansion of proximal joint scarcely extending to the 

 middle of the distal joint and clothed with a number of small spinules, both 

 apical setae rather slender and nearly equal. 



Colour of the living animal not yet ascertained. 



Length of adult female somewhat exceeding 1 mm. 



Remarks. In size and general appearance this form looks not unlike 

 Ectinosoma neglectum G. O. Sars, and may at the first sight easily be con- 

 founded with it. On a closer examination, however, it is found to be very 

 different and unquestionably belonging to the present genus. It is the largest 

 of the known species, and may moreover be recognised from any of them by 

 the structure of the last pair of legs. 



Occurrence, Some few specimens of this handsome species were picked 

 up from samples taken at Riser from a depth of about 50 fathoms, muddy 

 sand. I have not met with it in any other place on our coast. 



23. Pseudobradya leptognatha, G. O. Sars, n. sp. 



(PI. XX). 



Specific Characters. Female. Body rather slender, with the anterior 

 division somewhat dilated in the middle. Cephalic segment fully as long as 

 the exposed part of the trunk and rapidly narrowed in front; rostral plate com- 

 paratively small and obtusely rounded at the end. Urosome about equalling 

 in length Vi of the anterior division and rapidly tapered behind; genital seg- 

 ment rather large, though not fully attaining the length of the 2 succeeding 

 segments combined; anal segment comparatively small and minutely incised 



