Remarks on Myctophum glaciale (Reinh.). 21 
able that none have been found in the North Sea, where a branch | 
of the said current is setting southwards along the coast of 
England (see fig. 1); as mentioned before (on p. 15) specimens 
have been taken from the surface and the upper layers in the 
Faroe Channel. 
The southern range of M. glaciale lies at abt. 35° N. in the 
Western Atlantic (Goode & Bean 1896 p. 76). In the Eastern 
Atlantic the species does not seem to occur so far south. It 
must be admitted that the Mediterranean is included in its area 
of distribution (Fage 1910, Zugmayer 1911), the species is 
even taken in abundance here by recent Danish expeditions with 
the “Thor”. It is, however, noteworthy that Taning (1918) who 
has given a thorough account of this material, establishes a distinct 
race Myctophum glaciale var. thori for his Mediterranean speci- 
mens; the race is smaller than the Atlantic one, with, on the 
average, a smaller number of vertebre; it shows also differences 
with regard to the arrangement of the photophores. 
From the Atlantic coast of the Peninsula few specimens are 
known, but whether they should be referred to the Mediterranean 
or the Atlantic race is not decided. The “Thor” got only four adult 
specimens on the route from Gibraltar to the Bay of Biscay, ac- 
cording to Tåning probably belonging to the Mediterranean race; 
the northernmost locality was 39° 35’ N., off the coast of Portugal. 
Here at stat. 15, 40° 56’ N., the species also was taken by the “Mich. 
Sars” expedition according to Hjort (1912 p. 63). The Mycto- 
phids of this expedition have been placed in my hands for deter- 
mination. Though I have not finished with my work on this 
material, so much can safely be said that all the richer catches 
of M. glaciale are from the northern section across the Atlantic, 
from stations between 45° and 50°N. On the southern section 
noteworthy captures (of young individuals) occur only at two 
stations, stats. 66 and 67 south of Newfoundland (abt. 40° N., 
50° W.); otherwise the species is practically unrepresented in the 
material from the area between the Peninsula, Africa and the 
Azores. This part of the Atlantic has been subject to many 
investigations by the late Prince of Monaco but M. glaciale has 
not been recorded (Collett 1897, Zugmayer 1911). On the 
whole the Mediterranean race seems to be separated from the 
Atlantic race by an area where the species is rare or even absent. 
