Copepoda. — | 31 
ges which separate the deep basin of the Norwegian sea from 
that of the North Atlantic. It is here stated, that comparatively 
cold water flows over the ridges from the north at. the following 
places: 
The Wywille—Thomson ridge at a maximal depth of 550 m. 
» Feroe—Iceland > —>— 500 » 
»  Iceland—Greenland Oats == ca. 550 » 
To these may be added the contribution of the Labrador 
current, which also partially effects an influx of cold water into 
the North Atlantic. With these facts in mind, it will not appear 
strange that arctic copepods occur in the northern Atlantic. From 
the foregoing list may be noted the following: 
 Calanus hyperboreus at st. 5, 7, 9, 11. 
Spinocalanus abyssalis » » 5, 7, 9, 14. 
Gaidius tenuispinus ip (025, 06091001, 414. 
Gaidius brevispinus OG, 
Euchæta norvegica DAR 5 JOSTEIN 
 Undinella oblonga Reh OF 
Scaphocelanus magnus >» » 5, 7, 9, 14. 
Metridia longa > te 19: 
Heterorhabdus norvegicus » » 5, 7, 9, 11, 14. 
St. 9 is the only locality where all these species were cap- 
tured, and it is interesting to see that just at st. 9, according 
tO HELLAND HANSEN, the influence of the Atlantic current is dimi- 
nishing. 
Beside these species, there are several other arctic copepods 
which have been recorded from the North Atlantic area, the 
occurrence of which is referable to the influence of currents from 
the north. Among those may be mentioned: Fuchæta glacialis, 
Xanthocalanus borealis, Haloptilus acutifrons and Mormonilla 
minor. 
In the collections of the Michael Sars 1910 we have seen 
single specimens of E. glacialis from the Færoe—Shetland chan- 
nel. From the North Atlantic it is only once, recorded by worr- 
ENDEN'). C. WITH?) notes this species as being »fairly common in 
> eae na AG i” 
MANG: N. A; p. 133. 
ee eb. bh, p. 172. 
