Ichthyologiske notiser [. 05 
trawlings I should say that Glyptocephalus cynoglossus is the 
most characteristic fish of the muddy bottom in the various depths, 
followed by Etmopterus spinax, Raja oxyrrhynchus, Coryphae- 
noides rupestris and Chimaera monstrosa. A full comparison 
between these results and those from Stavanger-fjord is not allow- 
able as the ordinary trawl is far inferior to the prawn-trawl in 
catching fish, being soon filled with mud. The total absence of 
a slow fish like Hippoglossoides platessoides is, however, too 
frequent to be occasional. It must be concluded that the species 
does not descend here to greater depths than abt. 200 metres. 
The results of trawling operations, even with prawn-trawl, will! 
give an incomplete idea of the fish fauna in the fjords and must 
be supplemented by the use of other appliances e. g. lines in 
order to get the swifter fishes and those living somewhat remote 
from the bottom. NORDGAARD (1912 p. 57 & 58) has given a 
specified list of 2947 specimens of fish obtained on long lines in 
the Herlofjord (off Bergen) at depths between 300 and 400 metres; 
a summary hereof is found on page 8. 
The greater fjords of western Norway may be looked upon 
as separate faunal regions within the Norwegian area. The mouth 
of the fjord is barred by a submarine ridge; the superficial 
water-layers in the fjord are more or less dilated by fresh water. 
but, from about 50 meters and down to the bottom, water of 
Atlantic origin (Gulf-Stream water) is found of almost constant 
salinity and temperature. In the Sognefjord the greatest depths 
are nearly 1300 metres; the Gulf-Stream water thus occupying 
layers of a similar extent to that in the Atlantic west of the 
British Isles.) 
A thorough investigation of such a fjord e. g. the Sogne- 
yord is much required in order to ascertain which of the forms 
known from the waters outside enter the fjord, how their di- 
stribution is in connection with the hydrographical conditions 
and to what degree their life-history is bound to the fjord. By 
and for itself it would seem reasonable to assume that the condi- 
1) Sognefjord at Kirkebø ''/s 1916. Depth 1280 meters. Temperatures 
in C.° and salinities %0. Om., 16.42°, 8.07; 5 m., 10.94° 29.86; 50 m., 6.44°, 
34.53; 100 m., 7°, 34.88; 200 m., 6.83° 34.93; 600 m., 6.63°, 34.97; 1200 m., 
6.72°, 34.98. 
According to observations by Professor HELLAND-HANSEN. 
On 
