30 Alf Wollebæk. [No. 12 
during the period September — November. Amongst our rich material 
for this season, which is partly taken also from other localities 
there is not å single ovigerous individual to be found. On the other 
hand several were found with the ovaries more or less full. 
From Beier fiord 0. NorDGAARD has brought back nine speci- 
mens which were taken at the latter end of March, of which eight 
were females that had just deposited their ova, while the ninth was 
å male 41 mm. long. The berried females measured: 46—50—51 
—52 —52—53—53—60 mm. Specimens more or less berried are 
also to hand from later on in the spring and summer, taken partly 
on the West Coast and partly in the North Sea. 
Notwithstanding the fact that UC. Allmanmi is regularly found 
in our Norse fiords at the same depths as Pandalus borealis and 
that in the deeper parts of the eastern fiords at any rate it is the 
commonest carid after Pontophilus morvegieus, it nevertheless does 
not have the same breeding season as Pandalus borealis. For while 
Pandalus borealis is berried in autumn and winter and easts its ova 
between February and March Oramgon Allmanmi does not become 
berried until the spring and the larvae are hatehed during the 
summer months. It would seem moreover from the material in our 
possession not to have two breeding seasons å year and to differ 
in this respect from its near relation Crangon vulgaris. 
The third most common species Pontoplilus mnorvegicus, which 
as previously said is very frequently found together with Pandalus 
borealis and Crangom Allmanmni, has practically the same breeding 
season as the former. 
Maturity: From the measurements previously given of berried 
specimens from Beierfiord it will be seen that the smallest berried 
individual is 46 mm. 'This is the smallest of all the berried indi- 
viduals in our possession. 
Sclerocrangon ferox G. 0. SARS. 
Early stages: Qwing to the considerable size of the ova of 
this species G. Q. Sars, in his report on the Norwegian Northern 
Sea Expedition Crustacea I, has suggested that the development 
of its young is associated with å less complete metamorphosis than 
is the case with the other Crangonids. However so far as speci- 
mens secured during the Norwegian Northern Sea Expedition in 
alet Er 
