20 AXEL 0111,1 N, ARCTIC CRUSTACEA. 



in reg'ar<l to some amphipods f. i. Anijuiisca Eschyichtii Kröyeu, 

 In a future paper I hope to l>e able to add some more ex- 

 amples of this rule, when I have worked up all material at 

 my disposal. 



On the whole. I must confess that I should be inclined 

 to identify withont hesitation mj- specimens with Sar.s' C. 

 norvegica, if I liad to examine them witliout any knowledge 

 of C. hrachiata and thus without any preoccupied opinion, 

 so perfectly do they ag-ree botli in the details of the oral 

 parts and the other extremities, and in the general appear- 

 ance with Särs' description and figures of C. norvegica. 



This species is widel}- distribnted in the Arctic regions. 

 It has occurred at both West- (Hansen) and East Greenland 

 (Swed. Arctic Exp. 1<S99), in the sea between Iceland and Jan 

 May en, Sjntzbergen and Nova Semla (Norw. X. Atl. Exp., 

 Barents Exp., Swed. Arctic Exp. 1<S9^, 99), in the Kära Sea 

 (Dijmphna Exp.), at Franz-.Tosephs Land (Austro-Hmig. Exp.). 

 But, then, it has not been recorded, as far as I can see, be- 

 fore we come to the West coast of Baffin's Bay (Nilsson 1894) 

 and the East coast of North America (Harger). It is stränge 

 enough that no expedition has brought it home either from 

 the Siberian Sea, or from the Polar archipelago of North 

 America. C. norvegica is found by Särs only at three places 

 along the West coast of Norway. It goes as far south as to 

 the Bay of Biscay (Porcupine Exp.). 



Its vertical distribution is generally from some twenty 

 to 400 — 500 m. During the Swedish Arctic Expedition of 

 l'S99 it was trawled from a depth of 1275 m. 



It seems to live nearlv exclusivelv on muddv bottom. 



Fam. Gnathiidae. 



Gnathia Leach 1814. 

 Anceus Risso (male), Praniza Latreille (female and larva), 



Gnathia elongata (Kr0YER). 



Fig. 2. 



184(;. Anceus elougatus Kröyer, Voy. en Scand. etc. pl. 30, figg. 



3 a— g. 

 1847. » » Kröyer, Karcin. Bidr. 1. c. R. 2, Bd 2, p. 



388. 



