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



Fam. EUCRETIDjE. 



7. Euchceta norvegica, Boeck. 

 (PL XIV). 



Syn: Euchceta carinata, Moebius. 

 glacialis, Hansen. 



Remarks. Of this form a detailed description, accompanied with figures, 

 has been given by the present author in his account of the Crustacea of 

 the Norwegian North Atlantic Expedition. It was there pointed out that the 

 E. carinata of Moebius is identical with Boeck's species, nor can I see any 

 essential difference between it and the form subsequently recorded by Dr. 

 Hansen from the Kara Sea as E. glacialis. In the accompanying plate, I 

 give improved habitus-figures of both sexes, from specimens collected during 

 the Nansen Expedition. 



Occurrence. Of this magnificent Calanoid, specimens were found in 

 almost all the samples, and it seems, indeed, to be as common in the 

 eastern as in the western part of the polar basin traversed by the 'Fram'. 

 The largest female specimens, some of which still had their large, flattened 

 ovisac adhering to the genital segment, measured in length about 10 mm., 

 a truely gigantic size for a free Copepod. An unusually large 'Nauplius' 

 found in some of the samples taken north of the New Siberian Islands, I 

 believe to be the larva of this Calanoid. 



Distribution. Coast of Norway (chiefly in great depths), the German 

 Ocean, several stations of the Norw. North Atl. Expedition, the Kara Sea. 



Fam. 

 Gen. Undeuchceta, Giesbrecht. 



Remarks. Of this genus, established by Dr. Giesbrecht, hitherto only 2 

 species are known, U. major and minor, both from the tropical parts of 

 the Atlantic and Pacific Oceans. One of these (U. major) was believed to 

 be perhaps identical with the form recorded by Brady from the Challenger 

 Expedition as Euchceta australis. The genus is chiefly characterised by 

 the structure of the posterior maxillipeds. In this, as also in most other 

 characters, a very large-sized Calanoid from the Nansen Expedition seems to 



