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87
145. Themisto libellula, (Mandt).
Denne arktiske Fonn, der kun en og anden sjelden
Gang viser sig ved Finmarkens Kyster, observeredes under
Expeditionen 2 sidste Togter paa mange Steder i det
arktiske Hav, i talrig Mængde saavel i Vandskorpen som
paa meget betydelige Dyb, lige indtil 171(1 Favne.
Exemplarer fra de store Dyb er af særdeles betydelig Størrelse
sammenlignet med dem. der erholdtes i Vandskorpen, hvilke
væsentlig syntes at være yngre Individer. At virkelig hine
store, ved Hjælp af Trawl og Bundskrabe indfangede
Exemplarer stammede fra Dybet, godtgjøres ved det Faktum,
at Maveindholdet hos forskjellige fra dette Dyb optagne
Bundfiske, f. Ex. Lycodesarter ifølge Rob. Colletts
Undersøgelser for en meget væsentlig Del bestod af denne
Am-phipode. Den sydligste Station, hvor denne Form
observeredes (St. 96) ligger under 66° N. B. Her og paa et
Par af de følgende Stationer (Ståt. 183 og 205) erholdtes
den kun fra Dybet; medens Havet længere Nord. omkring
Jan Maven, Beeren Eiland og Spitsbergen ofte vrimlede
i Overfladen af denne Amphipode. Arten er udbredt til
Grønland, det sibiriske Ishav og den murmanske Kyst.
145. Themisto libellula, (Mandt.).
This Arctic fonn, of rare occurrence oft’ 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 fonn
occurred (Ståt. 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 Spitsbergen 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.
Et enkelt Exemplar af denne af Boeck fra Grønland
beskrevne Art erholdtes i Havet udenfor vor Vestkyst (St.
35) fra et Dyb af 1081 Favne.
147. Parathemisto abyssorum Boeck.
Foruden i Altentjord (Ståt. 2571 er denne Fonn under
Expeditionen bleven indsamlet paa 5 Hav-Stationer, alle
tilhørende den kolde Area. Samtlige Exemplarer blev
optagne ved Hjælp at Skrabe eller Trawl tildels fra meget
betydelige Dyb. Af disse Stationer ligger 2 (Ståt. 35 og
40) i Havet N og 0 af Færøerne, en 3die (Ståt. 137) SV
af Lofoten, en 4de (Ståt. 183) i Havet mellem Norge og
Jan Mayen og en 5te (Ståt. 237) SV af sidstnævnte 0;
Dybden fra 263 til 1 710 Favne. Arten er først opdaget
ved de britiske Øer (= Hyperia, oblivia, Sp. Bate, non
Kröyer) og forekommer meget almindeligt paa større Dyb
langs vor hele Kyst lige til Vadsø.
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 (Ståt. 35), at a depth of 1081 fathoms.
147. Parathemisto abyssorum. Boeek.
Apart from Altenfjord (Ståt. 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 Færoes, the next (Ståt. 137) south-west of Lofoten,
the 4th (Ståt. 183) in the tract of ocean between Norway
and Jan Mayen, and the 5th (Ståt. 237) south-west of the
latter island; depth ranging from 263 to 1710 fathoms.
The species was discovered off the British Islands i— Hi/peria
oblivia, Sp. Bate, non Kröyer), and occurs, very frequently,
at great depths, along the whole coast of Norway, as far
as Vadsø.
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