34 G. O. SARS. CRUSTACEA. [NORW. POL. EXP. 



route of the 'Fram'. The specimens are all more or less mutilated, owing to 

 the great fragility of the appendages, and this was also the case with the 

 Greenland specimens examined by Dr. Hansen. It appears somewhat doubt- 

 ful, whether this form should in reality be referred to the genus Amphithopsis 

 of Boeck. 



Distribution. Greenland, the Kara Sea. 



Fam. GAMMARID.K. 



15. Gammarus locusta, Lin. 



var. mutata, Lilljeb. 



Numerous specimens of this form, some of a very large size, were collected 

 in several places along the eastern part of the route of the 'Fram'. It also 

 occurred in 2 samples taken in the western part of the route, on the 4th 

 and 13th February, 1896. 



Distribution. Coast of Finmark, Greenland, Iceland, Spitsbergen, Franz 

 Joseph Land, the Kara Sea, Labrador. 



16. Amathilla pingvis (Krayer). 



A solitary specimen of this form was found in a sample taken on the 

 21st March, 1894, the tow-net having been lowered to a depth of 300 metres. 

 Distribution. Greenland, Spitsbergen, the Kara Sea. 



ISOPODA. 



Tribe: EPICARIDA. 



Several larvae of Epicarida, chiefly in the last (Cryptoniscian) stage, 

 were found in the samples taken north of the New Siberian Islands. Among 

 them could be determined: 1) larva? of Dajus mysidis, Kroyer, both in first 

 and last stages, 2) the Cryptoniscian larva first described by the Rev. M. 

 Stebbing from the marsupial pouch of an Onesimus plautus taken in the 

 Barents Sea, and subsequently found under similar circumstances by the 

 present author off the Norwegian coast, 3) another larva (in the Cryptoniscian 

 stage), closely related to the larva of Asconiscus simplex, G. 0. Sars. 



