Remarks on Myctophum glaciale (Reinh.). 29 
The question still remains whether any propagation really 
takes place in northern waters, and in that case whether the 
spawning individuals are to be found exclusively in the group III 
or also partly in the group II. At present these questions can 
not be definitely answered. In the Mangerfjord a female of 76 
mm. with ovaries well-developed, eggdiameter 0.4 mm., was taken 
on March 6th 1920; further on June 5th 1919 three males of 69, 
69 and 75 mm., and one female of 76 mm. with large ovaries. 
The latter catch was made by means of trawl and might indicate 
that the gear in midwater had passed a shoal; in the spawning 
season the Myctophids are supposed to congregate in shoals. 
On the other hand we have the statement by Nordgaard 
(1917 p. 22) that a female of 58 mm. total length had appa- 
rently ripe eggs; from October the same author, also from the 
Trondhjemsfjord, menticns three specimens; total length 65—70, 
one of them a female with small eggs. These specimens belong 
to group IJ. To this group belong also two females with large 
eggs collected by the “M. Sars” in Hjorundfjord on July 5th — 
1906. We have, however, no records from the fjords of young- 
fish, larval and post-larval stages. Therefore it can not be said 
that propagation really takes place here, nor can the data men- 
tioned above be interpreted as that the species here spawns twice 
in life. Some individuals may have immigrated when adult, 
others when young; only for the lastnamed it is reasonable to 
assume that the age at maturity is influenced by the new sur- 
roundings. 
From the Faroe Channel are known larval stages down to 4.5 
mm. in length taken together with post-larval stages between July 
30th and August 6th. These have probably not drifted very far from 
the place of spawning. We are, however, in ignorance of the 
northern range of the spawning area in the Atlantic. If the 
species in the north-eastern Atlantic spawns as far north as say 
abt. 60° northern latitude this may also take place in the waters to 
the north of the Wyville-Thomson ridge, viz. in the southern 
part of the Norwegian Sea. Spawning at these latitudes would 
probably take place in the summer months, the larval stages 
thus occurring in the plankton at a time when few investigations, 
especially with appliances suitable for the capture of young-fish, 
have been carried out. We have in reality from the Norwegian Sea 
