36 



Mindeskrift for J. Steenstrup. XXX. 



qualitative composition of the fish fauna of this deep basin. It is very poor as re- 

 gards the number of species. From the Shetland — Faeroe channel up to the height 

 of Spitsbergen the trawl constantly brings up the same forms in tedious monotony; 

 if we include all the species, both the common and the rare, the number is only 23. 

 They are distributed among the following groups: 



Sea-scorpions: 



Cottunculus microps Collett 



* — subspinosus Jensen 

 Artediellus uncinatus Reinhardt 

 Agonus decagonus Bloch-Schneider 



Liparids: 

 Liparis Fabricii Krøyer 

 Careproctus Reinhardti Krøyer 



* — micropus Gunther 

 *Paraliparis hathybii Collett 

 *Rhodichthys regina Collett 



Lycodes: 

 *Lycodes frigidus Collett 



— Esmarkii Collett 



— eudipleurostictus Jensen 



— pallidus Collett 



Lycodes: 

 *Lycodes platyrhinus Jensen 

 * — Liitkeni Collett 



— seminudus Reinhardt 

 *Lycenchelys muræna Collett 

 *Lycodonus flagellicauda Jensen 



Gadoids: 

 Onus Reinhardti Krøyer 



Flat-fish: 

 Platysomaiichthys hippoglossoides Walb aum 



Sharks: 

 Somniosus /wicroc^^joAa^w« Bloch-Schneider 



Rays: 

 Raja radiata Donovan 

 — hyperborea Collett 



The 9 species marked with an asterisk must be regarded as characteristic of the 

 Deep Norwegian Basin'), being a part of the special fauna of this deep basin and not 

 known from any other region of the sea. In my "Ichthyologiske Studier"^) I have 

 shown, namely, that the statement of the presence of some of these species {Lycodes 

 frigidus, Lycenchelys muræna) in the warm Deep Atlantic Basin (i. e. south of the above- 

 mentioned ridge between Europe and Greenland) arose from erroneous determinations, 

 as also the reverse statement that a species described from the Deep Atlantic Basin 

 {Cottunculus inermis Vaillant) may occur in the cold Deep Norwegian Basin. The 

 remaining 14 species do not have their proper home in the Deep Norwegian Basin; 

 they are for the most part arctic fish which in the high north live in shallower depths, 



') It should be expressly remarked, that by the "Deep Norwegian Basin" is understood 

 only the region of the Norwegian Sea which lies 300 fathoms and more below the surface of the sea. 

 2) Vidensk. Meddel, fra Naturhist. Foren, i København, 1901, pp. 191—216. 



