CRUSTACEA MALACOSTRACA. IV. 



LeptOStylis G. O. Sars. 



Of this characteristic genus 4 species have been gathered in the "Ingolf" area; 1 among them is 

 new to science. 



63. Leptostylis longimana G. O. Sars. 



1865. Diastylis longimana G. O. Sars, Forh. Vid. Selsk. Christiania for 1864, p. 173. 

 !io,oo. Leptostylis — G. O. Sars, Account, III, p. 68, PI. XLVIII. 

 1913. longimanus Stebbing, Das Tierreich, 39. Lief. p. 127. 



Sars says (in 1900) that the carapace is only clothed with scattered small hairs; I have found some 

 individual difference as to the number of such hairs, which vary from being present in a moderately good 

 number (from Stat. 27) to very few or perhaps nearly none. In the most hairy specimen the characteristic 

 uropods are completely as in typical specimens from the North Sea. It may be remarked that in different 

 genera of Cumacea (f. inst. Eudorella and Diastylis) a low or a somewhat higher number of hairs on carapace 

 (or abdomen) does not as a rule afford a specific character; perhaps hairs are frequently broken at the base 

 and lost. 



Occurrence. Taken by the "Ingolf" at 7 stations. 



Davis Strait: Stat. 27: Lat. 64°54' N., Long. 55°io' W., 393 fath., temp. 3. 8°; 1 specimen. 



Denmark Strait: Stat. 91 : Lat. 64' : 44' N., Long. 3i°oo' W., 1236 fath., temp. 3.1 ; 1 specimen. 



East of Iceland: Stat. 105: Lat. 65°34' N., Long. 7°3i' W., 762 fath., temp. -^o.S°; 1 specimen. 



— - Stat. 102: Lat. 66°23' N., Long. io°26' W., 750 fath., temp. -^0.9°; 2 specimens. 



— - Stat. 103: Lat. 66°23' N., Long. 8°52' W., 579 fath., temp. ^-0.6°; 1 specimen. 

 North-West of the Fseroes: Stat. 138: Lat. 63°26' N., Long. f<&' W., 471 fath., temp. -H>.6°; 1 



specimen. 

 Stat. 139: Lat. 63°36' N., Long. 7°3o' W., 702 fath., temp. -^0.6°; 4 



specimens. 

 Distribution. Taken a single time in northern Kattegat, 30 fath., and several times in Skager 

 Rak in depths from 70 to 350 fath. (Meinert, H. J. Hansen). At Norway taken at the south and west coast 

 from near Christiania to Lofoten, "generally" in depths from 30 to 100 fath. (G. O. Sars). Caiman records 

 it from west of Ireland, 199 and 382 fath. ; S. I. Smith wrote that "a single female, apparently of this species, 

 was dredged in Casco Bay". 



It may be remarked that the bathymetrical distribution of this species and its occurrence both in 

 the warm and the cold deep-sea area is rather interesting, especially as it has also been taken both in Kattegat 

 and at Norway in a depth of only 30 fathoms. 



In a female with marsupium from the "Ingolf" Stat. 138 a probably new species of Homoeoscelis 

 (a genus of parasitic Copepoda of the family Choniostomatidse) is found in the branchial cavities. 



