42 



contracted in front, with the rostral plate nearly horizontal and terminating in 

 a very acute point. Urosome rather massive and but slightly attenuated behind. 

 Caudal rami comparatively large and broad, about twice as long as the last seg- 

 ment, apical setae slender and elongated. Anterior antennse very short, 6-arti 

 culate, with the proximal joints considerably expanded. Posterior antennas with 

 the outer ramus very narrow, 3-articulate, the first 2 joints quite short. Anterior 

 maxillipeds extremely small, with the 2nd basal joint scarcely larger than the 1st. 

 Natatory legs comparatively more slender than in the preceding species. Last 

 pair of legs very largely developed and quite smooth below, marginal spines much 

 elongated, setiform, some of them extending as far as the tip of the caudal rami; 

 distal joint oblong oval in form, and regularly trilobate at the end, appendicular 

 bristle unusually prolonged and issuing from the lower face of the proximal joint; 

 inner expansion of the latter extending about to the middle of the distal joint, 

 outer apical spine rather elongated, though somewhat shorter than the inner. 



Colour whitish gray. 



Length of adult female 0.70 mm. 



Remarks. This form, which I cannot identify with any of the species 

 described by Mr. Scott, is easily recognizable by the acutely produced rostral 

 plate, and the large size of the last pair of legs, the marginal spines of which 

 are more elongated than in any other form known to me. 



Occurrence. Only 2 specimens of this form, both adult females, were 

 found, together with the preceding species at Selven, Trondhjem Fjord. 



28. Pseudobradya similis (Scott). 



(PL XXIII, fig. 2). 



Bradya similis, Th. & A. Scott, Eevision, p. 424, PL 35, figs. 3, 7, 16, 27, 33, 41, 48, PL 36, 



figs. 3, 10. 



Specific Characters. Female. Body moderately slender, with highly chiti- 

 nized integuments. Cephalic segment, seen dorsally, evenly contracted in front, 

 rostral plate somewhat deflexed and obtuse at the tip. Urosome less massive 

 than in P. acuta, slightly tapering distally. Caudal rami remarkably large and 

 elongated, equalling in length the last 2 segments combined ; apical seise compara- 

 tively short. Anterior antennae resembling in structure those in P. aeuta. Last 

 pair of legs comparatively large, though somewhat less broad than in P. acuta, 

 and clothed on the lower face with several transverse rows of delicate spinules, 

 marginal spines of moderate length and somewhat unequal; distal joint oblong 



