50 



the last pair fully as long as the remainder part of the leg. Last pair of 

 uropoda with the outer ramus rather large, its basal joint being considerably 

 dilated and very sharply defined from the small spiniform terminal joint; 

 inner ramus scarcely more than half as long as the outer. Telson about as 

 broad as it is long, cleft beyond the middle, the incision narrower than in 

 A. cwdouinianus, terminal lobes each with a single apical denticle. Colour 

 greyish white. Length 8 mm. 



JlciiHtr/,-*. Dr. Hansen has been the first to show that the Kroyerian 

 species Anonyx tumulus, which, as above stated, was identified by Boeck and 

 most of the subsequent authors with Lysianassa audouiniana of Sp. Bate, though 

 very nearly related, yet is evidently distinct from the latter, differing, as it 

 does, in several anatomical details very markedly, especially in the structure 

 of the last pair of uropoda. The form described by Mr. Schneider 1 ) as Meni- 

 i/r/rx (trrficii* is undoubtedly identical with the present species. 



Occurrence. - The species would seem on the coast of Norway to be 

 restricted to the arctic region. I have taken it, though rather sparingly, in 

 the Varangerfjord at Vadso in a depth of 60 80 fathoms, and a few speci- 

 mens are preserved in our Univ. Museum without statement of the locality, 

 but probably also found on the coast of Finmark. According to Goes it 

 occasionally is found in the branchial sac of Ascidias, as is the case with the 

 preceding species. 



Distribution. Arctic Ocean : Greenland, Spitsbergen, Franz Josephs Land. 



Gen. 11. Lysianella, G. 0. Sars, 1882. 



!>odv c( impressed, shorter and stouter in male than in female, coxal 

 plates rather large. Superior ante mitt in female comparatively slender, in 

 male much stronger, accessory appendage in both sexes rather elongated. 

 Inferior antenna 1 about as long as the superior, of uniform structure in the 

 two sexes, penultimate joint of the peduncle very large, laminarly expanded 

 and inside densely clothed with fine hair. Buccal mass greatly projecting 

 interiorly. Anterior lip jutting out in front of the epistome as a narrow 

 digitiform lobe. Posterior lip strongly chitinized, rather narrow, lateral corners 

 but little diverging. Mandibles very strong, but with the molar expansion 

 extremely small, palp unusually short and originating much nearer the base 

 than does the latter. .First pair of maxillae of usual structure, basal lobe 

 narrowly tapering and provided at the tip with 2 slender bristles; 2nd pair 

 with both lobes narrowly produced and setous only at the tip. Maxillipeds 



'; Tromse Museums Aarshci'tor VII. 



