70 Alf Wollebæk. [No. 12 
Bathymetrie distribution: Pandalus brevirostris is found 
in the Norse fiords at very varying depths, from 20—30 meters 
(Fitje near Bergen) down to over 600 m. (Tranødybet). 
Secondary sexual characteristics: Dr. CarLman says in 
his work *On the British Pandalidae” with regard to the 1st pleo- 
pod *the appendage resembles that of the female so much in general 
shape that it is difficult at first sight to distinguish the sexes by 
this character”. In å considerable number of specimens, about 22— 
25 mm. long, from the summer months I have constantly found the 
AB LEN jekk rd PI på» 2.Pk på 
Fie Er 
endopodite of the males å good deal broader in proportion to the 
length than the same part in females. In the case of the former 
the length is fully double the breadth, in the latter it is over three 
times as long. Ås is usual im our Pandalus-species the 1st Pleopod 
of the female is covered with much longer setae than those of the 
male. The latter has, as has invariably been the case with the 
whole of the Pandalidae previously mentioned, its tip furnished with 
a group of Cimcimnuli (ef. fig. 8 r.i. 1 PI. pd.) which are always 
wanting on this pair of pleopods in the females. 
Appendix masculina which is rather shorter than a. mterna 
on the 2nd pair of pleopods has sometimes been covered with setae 
rs 
