BIHANG TILL K. SV. VET.-AKAD. IlANDL. RAND 27. AFD. IV. N:0 8. H9 



27. Thysanoessa longicaudata (Kröyer). 



1840. Tbysanopoda lougicaudata KröYER, Voy. en Scand. etc, 1. c 



p. 7, fig. 1 a— f. 

 1882. Thysanoessa tenera G. O. Sars, Ofv. Norges Crust. etc, 1. c 



p. 53, tab. I, fig. 19—20. 

 1887. » longicaudata Hansen, Ofv. vestl. Grönl. Fauna 



etc, 1. c. p. 54. 



1892. » Norman, Lophogastridse and Euphau- 



siidae etc, 1. c. p. 463. 



1893. » > Stebbing, Hist. Crustacea etc, Le 



p. 265. 

 1893. » ■ Ortmann, Decapoden und Schizo- 



^ poden d. Plankton-Exp., 1. c. p. 14. 



1000. ■'> ■' Sars, Norweg. North Polar Exp. 



1893—1896. Crustacea, p. 14". 



Locality: 

 in 1900: 



II. lat. 7.3° 30' N., long. 2° W., depth 1500—0 m., vertical net, 

 13/VII, one spec 



This species has been obtained off tlie Western and 

 Northern eoasts of Norway, off Scotland, in the Fseröe Channel, 

 off Greenland (-. Valorons' Exp.* fidr Norman), in the North 

 Polar Basin, in the sea between Norway and Jan Mayen, and 

 at several stations of the German Plankton Expedition situa- 

 ted resp. in the areas of the Gnlf Stream, the Irminger Sea, 

 the West Greenland Current, and the Labrador Current. Krö- 

 yer's type specimens are from lat. 61 N., long. 13' W., and 

 from lat. 60' N., long. 11 W. The main distribution of this 

 species seems, therefore, to be, the Arctic parts of the North 

 Atlantic. 



Length: 15,5 mm. 



Fam. Mysidae. 



Boreomysis G. O. Sars 1869. 



This genus was instituted in 1869 by G. O Sars in his 

 ■>Unders0gelser över Christianiafjordens Dybvandsfauna» to 

 receive Mysis unika Kröyer, which, at that time, was only 



