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 the 

 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 transverse bands of a dark reddish brown hue. Length 

 of adult male 20 mm. 



Remarks. This form was first described by Kroyer as Gammarus 

 dentatus, and was subsequently referred by Sp. Bate to his genus Megamcera. 

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

 essential characteristics. The Gammarns purpuratus of Stimpson is undoubtedly 

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

 Ganutmnis Kr0yeri of Bell, and perhaps also with Gammarus longicauda 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 depths, 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 Karm0 (Boeck). 



Distribution. Arctic Ocean: Greenland (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. Cephalon 



without any rostral projection, lateral corners about as in Melita. Eyes 



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



small accessory appendage. Mandibular palp with the terminal joint 



ch elongated, and clothed with slender setee. Oral parts normal otherwise. 



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



