50 Alf Wollebæk. [No. 12 
of 100—185 meters. Later experiments with the trawl resulted in 
a yield of several kilos. However no fishery for these prawns has 
to my knowledge been attempted here.] 
18. Finmark Fiords. |s/s "Michael Sars” has taken Pan- 
dalus with the trawl in the Porsanger Fiord, though not in any great 
quantity. In 19038 curator Hans Kr1ær made some trawling-experi- 
ments in Balsfjord and its outlet to the sea through Tromsø sound 
and Kvalsund, and he also partly examined Kalfjord.') At the head 
of the Balsfjord between Tennæs and Kvitbergene at åa depth of 
70 fathoms (composition of the bottom loose mud) å series of hauls 
ylelded in all 30 liters of P. borealis (an average of 3 liters per 
haul). The temperature in the mud at å depth of 70 fathoms was 
+ 92.99 C. on the 13th August (at the surface on the same day it 
was + 139 C.).  Pandalus borealis was taken also in other parts 
of the Balsfjord and in its branches, but only in inconsiderable 
numbers. | | 
Breeding-season: It is about the middle of July in the fiords 
of southern Norway, the Christiania Fiord for instance, that we find 
the first Pandalus in which a light-blue mass of ova is to be discerned 
closely packed together under the transparent carapace. At the end 
of July å mass of ova of this nature will be found under the cara- 
pace of nearly every female over 12—16 cm. long (measured from 
the tip of the rostrum to the margin of the telson). In the early 
part of September the first berried individuals are met with and 
within a fortnight the greater part of the females have become 
ovigerous. The ova are carried all through the autumn and winter, 
being small to begin with, but inereasing gradually in size as they 
develop,—a fact capable of demonstration in the case of most of the 
erustaceans. In the southern fiords the larvae break out of the egg 
in February and March, but in the northern parts of the country 
the hatehing-period seems to last till later on in the spring, and I 
have received from Q. NorDGAARD berried specimens taken in Skjær- 
stadfjord (Nordland, 100—185 meters) in the first half of April, 
in all of which several days had apparently still to elapse before 
the embryo was completely developed. 
1) Of. H. Kiær: ,Om Forekomst af Dybvandsræker ved Tromsø*, ,Norsk 
Fiskeritidende* 1908, pages 624—628. 
