95 
Farewell and then northwards along the west coast; such older, 
pelagic fry, 27,5—43 mm long, has indeed been caught, as above 
mentioned, at the south coast of West Greenland at the end of 
September. In these west-greenlandic waters the fry now develops, 
but when the redfish has become mature it surely must emi- 
grate to places with warmer water, where it can spawn in spring. 
When I had finished this part of my paper I begged Dr. phil. 
J. N. Nielsen, the hydrographer of the Tjalfe-Expedition, to read it 
and to let me know, if he with his thorough knowledge of the 
course of the sea currents in these areas would think it likely that 
the young of the redfish might be carried in the above named 
directions in the course of the mentioned space of time. In his 
reply Dr. Nielsen gave the following declaration to the effect that 
— as will be seen — from a hydrographical point of view there 
can be no objection to the advanced theory: 
“From the observations on temperature and salinity at the 
Southern part of West Greenland there is reason to suppose that 
the warm under current below the polar current in summer moves 
at an average speed of ca. 8 miles in 24 hours, that is, a 
removal from the northern part of the Denmark Strait to about 
Fiskenæs, from the end of May till the end of September. Thus, 
the young may very well have time to make the passage in the 
under current, and as they — as indicated by yourself — most 
probably also rise to the surface strata — the polar current — 
as they are to be found at Angmagssalik in June, the problem 
seems quite clear to me: When once they have come into the 
polar current in the Denmark Strait, which is proved by their 
occurrence at Angmagssalik in June, they cannot possibly fail to 
reach South-West Greenland towards the end of the summer, the 
speed of the polar current undoubtedly exceeding the above men¬ 
tioned 8 miles in 24 hours at which I estimate the under current. 
Your supposition, therefore, seems most plausible to me.” 
3. Groivth. 
As to the growth of Sebastes marinus, some informations, given 
in the above, may be put together. In May the young are ca. 
7—9 mm, in June ca. 22—30 mm, in September—Oktober 27,5— 
49 mm, in winter 47 — 69 mm in length. In May of the next year, 
