37 
145. Themisto libellula, (Mandt). 
Den ae arktiske Form, dor kun en og anden sjelden 
Gang viser sig ved Finmarkens Xyster, observeredes under 
Expeditionens 2 sidste Togter paa mange Steder i det 
arktiske Hav, i talrig Mamgde saavel i Vandskorpen som 
paa meget betydelige Dyb, lige indtil 1710 Favne, Exem- 
plarer fra de stoi’e Dyb er af sierdeles betydelig Storrelse 
sammenlignet mecl dem, der erholdtes i Vandskorpen, livilke 
vaesentlig syntes at vaere yngre Individer. At virkelig bine 
store, ved Hjaip af Trawl og Bundskrabe inclfangede Ex- 
emplarer stammede fra Dybet, godtgjores ved det Faktum, 
at Maveindholdet hos forskjellige fra dette Dyb optagne 
Bundfiske, f. Ex. Lycodesartor ifolge Rob. Colletts Under- 
segelser for en meget vmsentlig Del bestod af denne Am- 
phipode. Den sydligste Station, hvor denne Form obser- 
veredes (St. 96) ligger under 66° N. B. Her og paa et 
Par af de folgende Stationer (Stat. 183 og 205) erholdtes 
den kun fra Dybet; medens Havet lamgere Nord, omkring 
Jan Mayen, Beeren Eiland og Spitsbergen ofte vrimlede 
i Overtladen af denne Amphipode. Arten er udbredt til 
Grsnland, det sibiriske Ishav og den murmanske Kyst. 
146. Themisto bispinosus, Boeck. 
Et enkelt Exemplar af denne af Boeck fra Gronland 
beskrevne Art erholdtes i Havet udenfor vor Vestkyst (St. 
35) fra et Dyb af 1081 Favne. 
147. Parathemisto abyssorum, Boeck. 
Foruden i Altenfjord (Stat. 257) er denne Form under 
Expeditionen bleven indsamlet paa 5 Hav-Stationer, alle 
tilhorende den kolde Area. Samtlige Exemplarer blcv op- 
tagne ved Hjadp at Skrabe oiler Trawl tildels fra meget 
betydelige Dyb. Af disse Stationer ligger 2 (Stat. 35 og 
40) i Havet N og 0 af Fmroerne, en 3die (Stat. 137) SV 
af Lofoten, en 4de (Stat. 183) i Havet mellem Norge og 
Jan Mayen og en 5te (Stat. 237) SV af sidstnsevnte 0; 
Eybden fra 263 til 1710 Favne. Arten er fprst opdaget 
ved de britiske 0er (= Hyperia oblivia, Sp. Bate, non 
Kroyer) og forekommer meget almindeligt paa stprre Dyb 
langs vor hele Kyst lige til Vadso. 
145. Themisto libellula, (Mandt.). 
This Arctic form, of rare occurrence off the Finmark 
coast, was observed throughout the Arctic Seas on the 2 last 
cruises of the Expedition, in great numbers, both at the 
surface of the water and also at a great depth, reaching 
1710 fathoms. Specimens obtained from great depths attain 
a very considerable size as compared with those taken at 
the surface of the water, which in greater part would appear 
to be young individuals. That the aforesaid large examples, 
brought up in the trawl or dredge, actually came from the 
deep strata, is proved by the fact, that in several bottom- 
fishes, e. g. various species of Lycodes taken at an equal 
depth, the contents of the stomach, according to Mr. Robert 
Collett’s investigations, consisted to a great extent of this 
Amphipod. The most southerly Station at which the form 
occurred (Stat. 96), lay in lat. 66° N. Here, as also at 
one or two of the next Stations (Stats. 183 and 205), the 
animal was obtained from the deep strata only, whereas, 
farther north, the surface of the sea surrounding Jan Mayen, 
Beeren Eiland, and Spitzbergen in places literally swarmed 
with this Amphipod. The species is distributed as far north 
as Greenland, the Siberian Polar Sea, and the Murman coast. 
146. Themisto bispinosus, Boeck. 
A sole individual of this species, described by Boeck 
from Greenland, was taken in the sea off the West Coast 
of Norway (Stat. 35), at a depth of 1081 fathoms. 
147. Parathemisto abyssorum, Boeck. 
Apart from Altenfjord (Stat. 257), this form was 
collected on the Expedition at 5 Stations in the open sea, 
all belonging to the cold area. The specimens were brought 
up exclusively with the dredge or trawl, in some cases from 
a very considerable depth. Of the said Stations, 2 (Stats. 
35 and 40) lay in the tract of ocean north and east of 
the Fgeroes, the next (Stat. 137) south-west of Lofoten, 
the 4th (Stat. 183) in the tract of ocean between Norway 
and Jan Mayen, and the 5th (Stat. 237) south-west of the 
latter island; depth ranging from 263 to 1710 fathoms. 
The species was discovered off the British Islands (= Hyperia 
oblivia, Sp. Bate, non Kroyer), and occurs, very frequently, 
at great depths, along the whole coast of Norway, as far 
as Vadsp. 
