14 G. 0. SARS. CRUSTACEA. [norw. POL. EXP. 



Distribution. Coast of Norway, Scotland, the Murman coast, Greenland, 

 east coast of North America. 



4. Thysanoessa longicaudata (Kroyer). 

 Syn: Thysanoessa tenera, G. 0. Sars. 



Solitary specimens of this form, in a more or less perfect state, were 

 found in 4 different samples taken in places lying widely apart from each 

 other (March 24th, 1894, July 30th, 1895, Feb. 4th, 1896, Feb. 13th, 1896), 

 the tow-net having been lowered to a depth of between 50 and 300 metres 



Distribution. Varanger Fjord, sea between Norway and Jan Mayen 

 (Norw. North Atl. Exp.), Greenland. 



AMPHIPODA. 



Fam. HYPERIID^. 



1. EutJiemisto libellula (Mandt). 



This well-known arctic form was taken both at the beginning and close of 

 the cruise, partly young, partly fully grown specimens. The greater number 

 of the specimens are, however, from the western part of the region traversed. 



Distribution. Coast of Finmark, the Murman coast, Novaja Sernlja, 

 Siberian Polar Sea, Beeren Eiland, Spitsbergen, Jan Mayen, Greenland. 



2. Parathemisto oblivia (Kroyer). 



This form also seems to be widely distributed throughout the Polar 

 basin, having bepn taken along the whole route of the 'Fram' in no less 

 than 12 different places. 



Distribution. Coast of Norway, British Isles, Greenland, numerous 

 stations of the Norwegian North Atlantic Expedition. 



Fam. LANCEOLIDJE. 



Gen. Lanceola, Say. 



Bemarks. This genus was established by the American zoologist, Th. 



Say, as early as the year 1818, to include a peculiar Amphipod belonging 



to the Hyperiid group. But the genus was not recognized by subsequent 



authors, some of whom regarded it as synonymous with Hyperia, others 



