516 



longer than the peduncle of the superior, last joint of the peduncle not 

 attaining the length of the penultimate one, flagellum scarcely longer than 

 the last peduncular joint. Anterior gnathopoda rather slender, with the 

 propodos about the length of the carpus, and considerably expanded, being 

 nearly triangular in form, palm somewhat oblique, and defined below by 

 a distinct angle. Posterior gnathopoda much stronger than the anterior, 

 with the propodos rather large, and oblong oval in form, palm very oblique 

 and imperfectly defined, being armed with 3 strong spines. The 2 anterior 

 pairs of pereiopoda with the carpal joint much larger than the meral one, 

 and somewhat expanded, basal joint of the 2 succeeding pairs rather narrow, 

 that of last pair, on the other hand, very large and expanded, being regularly 

 oval in form, and distinctly serrated on the hind edge. Last pair of uropoda 

 attaining the length of the urosome and metasome combined, basal part 

 rather short, outer ramus enormously developed and somewhat laminarly 

 depressed, last joint a little shorter than the 1st, and movably articulated 

 to the same, both being edged with small denticles, tip somewhat truncated, 

 and carrying a dense brush of delicate bristles; inner ramus extremely small 

 and scale-like. Telson not very large, subtriangular in form, and divided by 

 a narrow incision into 2 halves, each having at the unequally bidentate 

 tip a slender spine and a small bristle. Colour uniformly yellowish. Length 

 of adult male 11 mm. 



EeniarJcs. — As above stated, this form was detected by Bruzelius off 

 the coast of Bohuslan, and described in the above-cited paper as the type 

 of a new genus. It is easily recognizable from any of our other Gammaridse 

 by its extremely slender form, by the absolute want of eyes, and especially by 

 the enormous development of the last pair of uropoda. 



Occurrence. — I have met with this form occasionally in several 

 localities, both of the south and west coasts of Norway, as also in the 

 Trondhjemsfjord, and always in rather great depths, varying from 50 

 to 400 fathoms. It extends, according to Boeck, northwards to the 

 Lofoten Isles. 



Distribution. — Bohuslan (Bruzelius), Kattegat (Meinert), British 

 Isles (Norman). 



