50 



tlie last pair fully as lung as tlie remainder part of tlie leg. Last pair fif 

 nrop(j(la with the oiiter ramus rather large, its basal joint being considerably 

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

 inner I'amus scarcely more than lialf as long as the outer. Telson about as 

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

 A. amloninianiis, terminal lobes each with a single ajucal denticle. Colour 

 greyish wliite. Length B mm. 



liemarJcs. — Dr. Hansen has been the first to show that the Kroyerian 

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

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

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

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

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

 grates arcticus is undoubtedly identical with the present species. 



Occurrence. — The species wovrld 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 de^ith of (iO — 80 fathoms, and a few speci- 

 mens are preserved in our Univ. Museum w^ithout 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 Ascidite, as is the case with the 

 preceding species. 



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



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



Body conijjressed, shorter and stouter in male thau in female, coxal 

 plates rather large. Superior antennae in female comparatively sleiuler, in 

 male nuicli stronger, accessory appendage in both sexes ratlier elongated. 

 Inferior antennae about as long as the superior, of uniform structure in the 

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

 and inside densely clothed with fine haii'. Buccal mass greatly projecting 

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

 digitiform lobe. Posterior lip strongW cliitinized, rather narrow, lateral corners 

 but little diverging. Mandililes very strong, but with the molar ex2)ansion 

 extremely small, pal[) unusually short and oi'iginating nuich nearer the base 

 than does the latter. First jiair of maxillas 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 



'} Tromso Museums Anrslicfter VII. 



