30 Sigurd Johnsen. 
only captures from March to August because this has been the: 
season of investigations. From the Norwegian coast the records 
are practically from the whole year. 
M. glaciale has been recorded from various localities in the 
northernmost Atlantic. As mentioned before the species seems 
to be quite common south of Iceland (Semundsson 1909). The 
Danish "Ingolf” expedition captured some specimens in trawl in 
the following localities: — Stat. 12, entrance to the Denmark 
Strait; stats. 27 and 35, southwest of Sukkertoppen, Greenland; 
stat. 81 southwest of Iceland (Lutken 1898 p.9). From Green- 
land, whence the type-specimen of Reinhardt originated, Lit- 
ken (1892 p. 204) mentions specimens from Godthaab, Godhavn, — 
Ikerasak, Kangatsiak (near Egedesminde), Fredrikshaab and Suk- 
kertoppen. Reinhardt (acc. to Liitken) had had specimens from 
Umanak, Jakobshavn and Ritenbenk. Litken (1892). was not 
quite sure that the specimens recorded by Goode & Bean 
(1883 p. 222) from off the coast of South Carolina really belonged 
to M. glaciale and not rather to some species of Myctophum 
from the warmer seas. He harboured some doubt as to M. glaciale 
ranging so far south in the Atlantic, though he was inclined to 
reckon some young specimens from the Mediterranean as belonging 
to the species. This view held by Litken may, I think, be 
understood when taken in relation to the material he had at 
hand for his work on the Myctophidæ (1894). Besides some 
specimens from Greenland and other sub-arctic waters the main 
part of his material had been collected by Danish merchant vessels 
in various warm seas, — the Atlantic to the north of abt. 40° N. 
being poorly represented. 
The distribution of M. glaciale in the western part of the 
North Atlantic must be explained in the same way as in the 
eastern part and adjacent waters (the Norwegian Sea). From 
the southern centre of distribution the species follows the north- 
going warm currents into the sub-arctic regions. The localities 
from Greenland, enumerated above, are all situated on the west 
coast. Here the waters of the Davies Strait and the Baffins Bay 
are influenced by a branch of the Gulf Stream which from about 
40° northern latitude goes as an under-current northwards, and 
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