68 CRUSTACEA MALACOSTRACA. 



Further, the species has been taken at 66 2' N. L., n5'W. L., 552478 fm. ("Thor" 1903). It 

 has never been found at West Greenland; at East Greenland the species has been taken five times 

 between 74 52' N. L. and 72 28' N. L., depths from 95 to 185 fm. (Ohlin). At Jan Mayen it has been 

 taken in 678 fm. (Ohlin). South of the Faeroes it has been found at 61 23' N. L., 4 21' W. L., 505 fm., 

 temp. -=- 0-4, 5 specimens ( Wandel), and it is given from 60 3' N. L., 5 51' W. L,., 540 fm. (Norman). 



Distribution. The species was first taken at Franz Joseph Land, 97 fm. (Heller). It 

 was taken by the Norwegian North-Atlantic Expedition at 9 stations with negative bottom- 

 temperatures and all lying in the waters west of Norway and from there up to the west of Spitz- 

 bergen from 63 17' N. L. to 79 59' N. L. (G. O. Sars). The depths varied between 350 fm. and 1081 fm. 

 It is also given from 78 2' N. L., 9 25' E. L., 416 fm., with a bottom-temperature of 0-8 (G. O. Sars), 

 likewise from 79 58' N. B., 9 30' E. L., 224 fm. with a bottom-temperature of 1-5 (Ohlin), but both 

 stations lie on the border of the cold area. Lastly, the species has been taken in the eastern part of 

 Barents Sea: 75 16' N. L., 45 19' E. L., 160 fm. (Hoek). 



It appears from the above that the species is found only at depths from ca. 100 fm. to 1080 fm. 

 in the cold area from the Fseroe Channel northwards to the northern part of East Greenland, Spitz- 

 bergen, Franz Joseph's Land and the Barents Sea; it has twice been taken in the neighbourhood of 

 Spitzbergen near the boundary to the area mentioned, in temperatures a little above o. 



Remarks. The species stands extremely near to B. gracilis Smith, as is mentioned below, 

 where the differences between the two forms are also dealt with. 



62. Bythocaris gracilis S. I Smith. 



1885. Bythocaris gracilis S. I. Smith, Proc. U. S. Nat. Mus., Vol. VII, p. 497. 



1886. S. I. Smith, Rep. Comm. Fish and Fisheries for 1885, p. 658, PI. XII, figs. 3, 4. 

 Occurrence. This species was taken by the "Ingolf" at three stations: 



Davis Straits: St 28: 65 14' N. L., 55 42' W. L., 420 fm., temp. 3-5; 3 spec. 

 27: 64 54' 55 10' 393 3-8; 2 



South of West Iceland: St. 67: 61 30' N. L., 223o'W. L., 975 fm., temp. 3; i spec. 



Distribution. Previously, only two specimens in all were known from two localities east 

 of North America, namely, about 39'/ 2 N. L. and 353/4 N. L. in 1043 fm - and 888 fm -> tem P- 3 8 and 

 39 Fahr. 



Remarks. My specimens must be referred to B. gracilis Smith; but the following remarks 

 have to be made. The median dorsal spine on the gastric region occurs in all specimens; in one of 

 them it is certainly very small and it occurs in some specimens of B. Payeri from St. 116, so that its 

 presence in B. gracilis is not a valuable character. The eyes in B. gracilis are but little larger than 

 in B. Payeri; it is necessary however to carefully choose equally large specimens of both species for 

 comparison. The best character between the two seems to be, that the antennal scale is somewhat 

 narrower and a little longer in B. gracilis, but the difference is much smaller than is given in Smith's 

 description, and in B. Payeri the scale becomes relatively a little broader with age. Smith's figure 

 of B. Payeri was drawn from a specimen larger than the one which formed the subject for his figure 



