42 Alf Wollebæk. [No. 12 
Dr. AppPELLØF, ceurator NORDGAARD and s/s "Michael Sars” from 
many different parts of the country and practically at all seasons 
of the year, we have found that for the months of July, August 
and September we have no ovigerous individuals. On the other 
hand we do have berried females in our material from October, 
November, January, February, March and April. The breeding- 
season begins then in the autumn months (October—November), 
and the spawn is cast in March— April. The ova in all the ber- 
ried specimens from the spring months were very fully developed: 
and from the middle of April we have larvae that were found 
pelagic in the upper layers of water in Drøbaksund. 
If we compare Pandalus borealis with Pontophilus morvegicus, 
side by side with which, as previously stated, it is found in quan- 
tities in the Norse fiords, we will find that the breeding-season of 
both these species is practically the same. However with P. mor- 
vegieus it probably commences rather later in the autumn and 
accordingly does not terminate till somewhat later in the spring. 
Small specimens from 18 to 28 mm. long are especially 
numerous for the months of July—August (Bergen fiords). 'These 
may presumably be aseribed to the brood of the previous year. 
Male and Female: The smallest specimens of berried females 
to be found in our material are 43 mm. long. Ovigerous specimens 
under 50 mm. are on the whole rare. The males do not attamm 
the same size as the females. Specimens of males over 50 mm. 
long are comparatively scarce. 
The largest male measured was 55 mm.; the largest female 
76 mm. (both from fiords in the east of Norway). 
Secondary sexual characteristics: As already pointed 
out by MrcHakeL Sars in his original description,” an easily 
distinguishable difference between males and females is to be found 
in Pontophilus norvegicus (and other Fontophilus-species), as in So 
many of the Carids, in the lashes of the 1st pair of antennae. 
In the males the outer lash is much stouter (and shorter) than the 
inner. Both the lashes project by about half their length beyond 
the scale of the nd pair of antennae. In the females on the 
”») , Bidrag til Kundskab om Ohristianiafjordens Fauna”. Christiania, 1868. 
