72 AXEL OHLIN, ARCTIC CRUSTACEA. 



in 1900: 



stat. 29. lat. IT 42' N., loug. 14° 49' W., betwccn Greenland and 

 Jan Mayen, dcpth 2000 m., clay witli foniminifers, 27/VIlI, 

 niany spec. 



This easily-recognizable form was, for the first time, re- 

 corded by the late Willemoes-Suhm who referred it to Peta- 

 lophthahwÅS on account of the resemblance, in respect to the 

 rudimentary eyes, betweeu this species and Petalophthalmus 

 armlger — also obtained at a very considerable depth during 

 the Challenger Expedition and described by the same distin- 

 guished zoologist. On the Norwegian North Atlantic Ex- 

 pedition the same species was also trawled, described, and 

 figured by Särs, who, after the working-up of the material 

 of Challenger Schizopoda, was not able to find any differences 

 between the Arctic and Antartic specimens. He also proved 

 that the species must be referred to Borcomysis, and, in his 

 Challenger Report, he explains the reasons why he thinks it 

 inadvisable to adopt Willemoes Suhm's specific name, althongh 

 it can justly claim priority. 



Besides its very striking peculiarities in structure, this 

 species is also of the ntmost interest with regard to its geo- 

 graphical distribution. Up to now it has been obtained at 

 three stations on the Challenger Expedition between lat. 

 46° 16 S. and lat. 53° 55' S. on the one side, and between 

 long. 48° 27' E. and long. 123° 4' E. on the other, the depths 

 varying from 1600 to 1950 fathoms. During the Norwegian 

 North Atlantic Expedition it was obtained at lat. 71° 59' N., 

 long. 11° 40' E. from a depth of 1110 fnthoms. These are, 

 as yet, the only localities recorded for this species, besides 

 those enumerated by me from the last Swedish expeditions. 

 But it has hitherto been obtained in no other place in the 

 intermediate tropical seas. Thus, it seems to be a »bipolär» 

 form, to which animals two other Schizopoda may also be- 

 long, viz. the Arctic Lophogasfer tupicus M. Särs, obtained 

 by the Challenger» at two stations south of the Cape of 

 Good Hope and AmhJyops Crozctii Willemoes- Suhm repre- 

 sented in the Challenger collection by a single specimen from 

 Crozet Island, and now rediscovered in the Arctic Ocean by 

 the Swedish Expedition of 1900 {vide infra). The explanation 

 of such stränge occurences belongs, without doubt, to the most 



