26 Alf Wollebæk:. [No. 12 
meters, and that was the greatest depth at which the species had 
been found till then. 
Breeding Season: One of the specimens found in the 
Brevik Fiord on the 8th December 1898, at å depth of nearly 120 
meters, was berried: and out of å few taken off Jaederen on the 
3rd August å single individual had very ripe spawn attached, while 
others had just deposited their ova. The size of the berried speci- 
mens was between 39 and 43 mm. 
ErnrrEnBavum's researches along the German eoast have elieited 
the fact that Crangom vulgaris has two breeding periods in the 
year, during which seasons berried specimens may be found, viz: 
from the middle of April to the beginning of June and in 
QOctober-November, however berried specimens may also be 
found occasionally at other times. It is especially when mentioning 
these berried individuals that EnrenBaum maintains that they 
frequent deeper waters in the cold season. 
Crangon Allmanni Ku. 
In his work: *Die decapoden Krebse der arktischen Meere” 
[Fauna arctica”, Abh. no. X 1900] F. Dorner calls Crangon All- 
manni KIN. a subspecies of Crangon vulgaris Lin. terming it Crangon 
cerangon Allmanni Kin. I have been able to collect å considerable 
material of Crangom Allmanmi Kan. from some of the southern 
Norwegian fiords and nearly 500 individuals have been examined. 
The two longitudinal carinae on the 6th abdominal segment (figs. 3 
—4, Å. Pl. VIII) have always been clearly marked so that there 
has never been any diffieulty in distinguishing this species from 
Orangon vulgaris (figs. 3—4, B). 
The chief points of difference between vulgaris and Allmanmi 
lie in the ist Antennae (fig. 1). In the females of both species 
the outer braneh on this pair of antennae is shorter than the inner; 
but ÆC. Allmannis outer branch as compared with the inner is much 
shorter and with fewer artieulations than the same branch of 
UC. vulgaris. An Allmanni 78 mm. long (measured from the margin 
of the telson to the tip of the rostrum) had an outer braneh 7 mm. 
long (with 37 artieulations; å 65 mm. specimen only 30 articula- 
tions) and an inner branch 12 mm. long. Å vulgaris 65 mm. 
