32 Dr. B. Lysholm and O. Nordgaard. 
the ocean north of Iceland, and in Denmark strait<. Its occur- 
rence in the Norwegian Sea and polar basin was noted by a. o. 
-sars}) Originally it was described by nu. j. HANSEN from the Kara 
Sea. It is certainly only exceptionally that this species passes 
-over the ridges into the North Atlantic. 
Xanthocalanus borealis was described by a.o. sars (1900) 
from the polar basin, north of the New Sibirian isles. G. 0. Sars 
has also taken th: species in the Stavangerfjord, where he regards 
it as a relict from the glacial period. From the North Atlantic 
it is recorded by FARRAN». In 1897 vaNHorFEN described a spe- 
-cies of Xanthocalanus from Greenland (X. hirtipes). It is pos- 
sible that the two forms are identical. If further investigations 
should establish the identity, the name of sars must be dropped 
for that of vANHÖFFEN». The identity appears to be very probable, 
as in the collections of Michael Sars 1910 we have seen specie- 
mens of X. borealis both from stations off the Newfoundland 
bank and from the ocean south-west of Ireland. 
The occurrence of Xanthocalanus at these remote stations 
is referable to transport by the Labrador current and to the 
under-currents of cold water flowing over the ridges between 
Scotland and Iceland. 
Haloptilus acutifrons was described by aiesBrecHt (1892) as 
Hemicalanus acutifrons from the western part of the Mediterra- 
nean. In 1900 c.o.sars described a Hemicalanus spinifrons 
from the polar basin, and this he later*) identified with the Me- 
-diterranean species, » with which it seems to agree fairly well, 
‘exept in size, which is somewhat larger«, under the name of 
Haloptilus acutifrons ciesprecHt. At the same time SARS also 
noted this species from the Norwegian sea at a station located 
-between Jan Mayen and Norway, 500—1000 m. The occurrence 
-of this species in the North Atlantic is recorded by FARRANy. In 
‘the collections of the Michael Sars 1910 we have seen specimens 
from st. 92, 48° 20’ N, 13° 55’ W, 200—500 m. wire 
—»— 19, 36° 5 N, 4° 42? W, 300—400 —»— 
HA: 
_ WITH, CG, Dil. p. 241. 
Ny pi 123. 
VL. A. p 6B. 
Opp PO 
