514 



the urosome and the last segment of metasome combined, outer ramus very much 

 elongated, and sublinear in form, with several fascicles of spines on both 

 edges, tip truncated and armed with 4 spines, one of which is rather large; 

 inner ramus extremely small. Telson not nearly extending to the end of tlie 

 basal part of the last pair of uropoda, terminal lobes conically pointed, and 

 each carrying inside the point 2 spines, outside a single bristle. Body 

 yellowish, with broad transver.se bands of a dark reddish brown hue. Length 

 of adult male 20 mm. 



BeniarJcfi. — This form was first described by Kroyer as Gammarus 

 deniafiis, and was subseqxxently referred by Sp. Bate to his genus Mpgamo'ra. 

 Boeck justly placed it within the genus MclHa, with which it agrees in all 

 essential characteristics. The Gammarns imrpuratus of Stimpson is undoiibtedly 

 identical with the present species. This is also probably the case with 

 Gammarus EJrByeri of Bell, and perhaps also with Gammarus longicanda of 

 Brandt. From the other species of the genus this form, is easily distinguishable, 

 not only by its comparatively large size, but also by the very slender and 

 compressed body, the dentated posterior edge of the segments of metasome 

 and urosome, and the structure of the gnathopoda. 



Occurrence. — Along the whole coast of Finmark this .species is 

 rather frequently met with in moderate dejiths, from 10 to 50 fathoms. It also 

 occurs not infrequently in the Trondhjemsfjord, and extends southwards along 

 the west coast of Norway at least to Karmo (Boeck). 



Distribution. — Arctic Ocean: G-reenland (Hansen), Iceland (Torell), 

 Spitsbergen (Goes), the Barents Sea (Hoek), Jugor Sharr (Hansen), the "White 

 Sea (Jarzynsky), Labrador (Packard), Grand Manan (Stimpson); Bohuslan 

 (Bruzelius), Kattegat (Meinert), British Isles (Norman). 



Gen. 7. Eriopisa, Stebbing, 1890. 



Syn: Eriopis, Bruzelius. 

 » Niphargus, Boeck (not Schodte). 



Body slender and smooth, with very small coxal plates. Cephalou 

 without any rosti-al projection, lateral corners about a.s in Melita. Eyes 

 wanting. Superior antennae much longer than the inferior, and with a 

 very small accessory appendage. Mandibular palp with the terminal joint 

 much elongated, and clothed with slender setae. Oral parts normal otherwise. 

 Gnathopoda rather unequal, the posterior ones being much the larger; both 



