tapering- to the end. Posterior gnathopoda with the propodos scarcely half 

 the length of the carpus, roundly expanded below the dactvlns. Last pair 

 of uropoda with the inner ranms considerably shorter than the outer. Telson 

 about the length of the basal part of the last pair of uropoda, cleft beyond 

 the middle, the lobes narrowly rounded at the tip and cadi armed with a 

 small apical denticle. Body whitish, ornamented with closelv set pigmcnt- 

 ary spots of a beautiful crimson colour forming bro;id transversal b;m<ls 

 over the body and partly also down the coxal plates. Length 14 mm. 



linnarl-ft. From the very nearly related arctic form, S. li<lnili<;tlttttix 

 (Sp. Bate), the present species is easily known, as well by the far inferior 

 size, and by the broadly rounded corners of the last pair of epimeral plates of 

 the metasome. According to the figures given by Hoek of his Sorririi'-* ovalis, 

 which is identical with the above named form, the posterior gnathopoda also 

 differ very markedly from those in the present species by the propndal joint 

 being produced to an angular corner beneath the tlactylus. 



Occurrence. Off the coast of Norway this form is chiefly restricted 



to the arctic region, occurring rather plentifully along the whole coast of Fin 

 mark at moderate depths. Occasionally, however, it is also met with on the 

 west coast, as far south as Haugesund (Boeck). 



Distribution. - - Arctic Ocean: Greenland, Spitsbergen, Iceland, Novaja 

 Semi] a, the Kara Sea. 



Gen. 9. Ambasia, Boeck, 1870. 



Body rather compressed, with large and deep coxal plates. Kyes 

 with the visual elements imperfectly developed. Antennae (in female) short 

 and stout, about of equal length, antepenultimate peduncular joint of the 

 inferior ones rather elongated, flagellum in both pairs only composed of a 

 very restricted number of articulations. Epistome projecting in front of the 

 anterior lip as a large angular plate. Posterior lip membranous, with the 

 lateral corners narrowly exserted. Mandibles rather strong, cutting >'dgc 

 broad, molar expansion very slight, almost obsolete; pal]) slender, originating 

 nearer the base than does the latter. First pair of maxilla- with the mastica- 

 tory lobe less strong than usual and having a rather limited number of spines, 

 basal lobe very small and rounded, palp well developed. Second pair of maxilhv 

 with the lobes nearly equal-sized and not very elongated. Maxillipeds with 

 the masticatory lobe very large, elliptical, palp poorly developed, only 



7 Crustacea. 



