102 CRUSTACEA MALACOSTRACA. 



East Greenland: Cape Brewster: 70 09' N. L., 22 02' W. L., 250 fm., 2. Amdrup Exp.; i spec. 

 Off Kaiser Franz Joseph Fjord, 132 fm.; several spec. (test. Ohlin). 

 Entrance of 106158 fm.; 3 spec. (test. Ohlin). 



North of the Fseroes: 63 10' N. L., 7 31' W. L., 532 fm., Young-fish trawl with 800 met. wire out, 

 "Thor" 1904; i spec. 



South-East of the Fseroes: 61 23' N. L., 42i'W. L., 505 fm., temp. -^ 0-4, Wandel; i spec. 



We see that wherever the bottom-temperature was given, it was o or as a rule under o; the 

 probability is that the 4 localities in Baffin Bay had the same temperature and for all the others it 

 is certain that the bottom-temperature was negative. But the "Thor" has twice taken it in the young- 

 fish trawl at a depth scarcely over 200 fm., whilst the waters at both places were more than twice 

 this depth; whether these specimens were taken in water under or yet very near o cannot be deter- 

 mined. Future investigations must settle, however, whether the species belongs as a rule to the 

 mesoplankton or lives near the bottom. 



Distribution. Outside the area specially dealt with here, only the full-grown male on which 

 Sars founded the species has hitherto been taken and came from 79 59' N. L., 5 40' E. L., 459 fm., 

 temp, -i- i. 



Remarks. The largest specimen, an adult male from "Ingolf" Stat. 116, is 51 mm. from tip 

 of rostrum to end of telson; the female is somewhat smaller, one of my largest specimens (from 

 "Ingolf" Stat. 138) being only 42*5 mm. long; Ohlin gives the length of his largest female from East 

 Greenland as 49 mm. 



8. Boreomysis arctica Kroyer. 



1861. Mysis arctica Kroyer, Naturh. Tidsskr., 3. R., B. I, p. 34, Tab. I, Fig. 5 a f. 

 ! 1879. Boreomysis arctica G. O. Sars, Monogr. Norg. Mysider, III, p. 10, Tab. XI XIII. 



Occurrence. The "Ingolf" has not taken this species, but it is present from other sources. 

 Kroyer founded it on a specimen from West Greenland, but the locality is unknown; it was taken 

 later on the same coast in Lille Karajok Fjord, ca. 70 20' N. L., 100 fm. by Dr. E. Vanhoffen. In 1904 

 the "Thor" took a number of specimens south-west of the Faeroes: 6ii5'N. L., 935'W. L., 450 500 fm. 



Distribution. The species is also known from Norway, where it was taken by G. O. Sars 

 in Christiania Fjord, Hardanger Fjord and at Lofoten; concerning its bathymetric occurrence he writes 

 that he had never met it "before at a depth of 200 fm. whereas in Hardanger Fjord it goes down 

 right to 400 fm." Nordgaard notes it from West Finmark and says: "There can, however, hardly be 

 any room for doubt that it has planktonic habits, as it has several times been taken by townetting". 

 It has also been taken in the Skager Rak (Internal. Explor.) and west of Ireland at depths of 181 to 

 382 fm. (Holt & Tattersall), at the east coast of America at ca. 40 N. L., 500 fm. (S. I. Smith), lastly in 

 the western Mediterranean near Capri (Lo Bianco). 



Remarks. Czerniavsky is doubly incorrect in basing a new genus, Arctornysis, on this species 

 of Kroyer and in considering it as different from Sars' form. The thoracic "tarsi" have in reality, as 

 Sars states, only 3 joints, but there are further more or less distinct traces of other two similar "false" 

 articulations, and it is these which Kroyer indicated as really existing articulations. The generic 



