109 



of the inferior ones, flagellum composed of only 4 joints, including the very small 

 apical one. Inferior antenna) rather slender, with the flagellum longer than the 

 peduncle. Legs comparatively slender, though less rapidly increasing in length 

 posteriorly than in the 2 preceding species; 1st pair, as usual, much the shortest, 

 with the carpus somewhat shorter than the propodos, and armed inside with 3 

 spines; last pair scarcely longer than the body, carpal joint somewhat dilated 

 distally. Uropoda obliquely truncated at the tip, and setous at each corner. 

 Colour dark brown, from numerous pigmentary spots forming irregular shadows. 

 Length of adult female scarcely reaching to 3 mm. 



Remarks. This species was established by Kroyer from Greenland spe- 

 cimens; but its true specitic characters were not fully recognized. For the figures 

 given by the same author in the great work of Gaiinard, evidently belong to two 

 distinct species, confounded by him at that time. From the 2 preceding species, 

 it may be distinguished by the comparatively more slender inferior antenna?, the 

 less elongated legs, and the form and armature of the caudal segment. It is also 

 rather inferior in size, and always exhibits a very dark colour. 



Occurrence. The species is rather common off the Lofoten Islands and 

 along the whole Finmark coast, in moderate depths, among Hydroida. It also 

 occurs occasionally off the west coast of Norway, but nowhere in any abundance. 



Distribution. Greenland (Kroyer), Atlantic coast of North America (Harger), 

 Iceland and Spitsbergen (Norw. North Atl. Exped.). 



4. Munna Kroyeri, Goodsir. 



(PI. XLVI, tig. 1.) 

 Munna Kroyeri, Goodsir, Edinb. New Phil. Journ. Vol. XXXIII, p. 365, PL 6, fig. ti. 



Syn: Munna Whiteana, Sp. Bate & Westw. $. 

 Fabricii, Kroyer (part). 



Specific Characters. Body of female somewhat robust, with the anterior 

 division oval in form, and the segments very sharply marked off from each other, 

 and clothed laterally with scattered hairs. Body in male, as usual, much narrower. 

 Ocular processes conically tapered. Caudal segment comparatively short, scarcely 

 more than half as long as the uiesosome, and rounded oval in form, lateral edges 

 rather bulging in front, and each armed with 4 strong denticles, the posterior 

 pair subdorsal, tip bluntly produced, and without any serrated lamellae. Eyes 

 comparatively small, at least in female. Superior antennae very short, extending 

 not nearly to the middle of the penultimate peduncular joint of the inferior ones, 

 flagellum composed of only 3 articulations, including the very small apical joint. 



