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Yed Bearbeidelsen af det særdeles vidtløftige Materiale
af Crustaceer, indsamlede og iagttagne under
Expeditionen. har jeg fundet det praktisk rigtigt at dele min
Afhandling i tre Afsnit. I 2det Afsnit gives en fuldstændig
systematisk Fortegnelse over samtlige under Expeditionen
iagttagne Arter med Angivelse af Findested samt korte
Bemærkninger om Forekomst og Udbredning. I sidste
Afsnit meddeles de mere almindelige Slutninger, hvortil Studiet
af Nordhavsexpeditionens Crustaceer har ledet, dels i
Henseende til Faunaens almindelige Character, dels til dens
supponei’ede Bevægelse (Ind- og Udvandring af Dyreformer)
samt de physiske og meteorologiske Forhold, som herved
synes at være bestemmende. Förste Afsnit er derimod kun
forbeholdt udførlige Beskrivelser af nogle enkelte Former,
der enten er nye for Videnskaben eller hidtil mindre
fuldstændigt beskrevne og afbildede. Herved er dog at mærke,
at jeg ialmindelighed ikke har indbefattet herunder de
Former, som tidligere er constaterede som tilhørende Norges
Kystfauna. Disse sidste vil paa et andet Sted blive
udførligt omhandlede, nemlig i et større faunistisk Arbeide
over Norges Crustaceer, som jeg med det allerførste agter
at paabegynde.
Til de medfølgende Plancher har jeg selv udført alle
Figurer og overalt herved anvendt Camera lucida, hvorved
deres Nøjagtighed er garanteret. Til Grund for de fleste
Habitusfigurer ligger colorerede Tegninger udførte af mig
under selve Expeditionen efter friskt indfangede og endnu
levende Exemplarer.
De her beskrevne nye Former er tidligere .kortelig
blevne characteriserede i følgende to paa Latin affattede
foreløbige Afhandlinger, begge indførte i "Archiv for
Mathematik og Naturvidenskab":
1. Prodromus descriptions Crustaceorum et
Pgcnogo-nidarum, qvæ in Expeditiane Norvegica anno 187U observavit
G. O. Sars.
2. Crustacea et Pycnogonida nora in itinere 2do et
3tio Expediti&nis Norvegicæ anno 1877 & 1878 coUecta.
(Prodromus descriptions).
For at undgaa Gjentagelser ved Opgivelsen af
Findestederne. meddeles nedenfor en Tabel over alle de Stationer,
paa hvilke Bundskrabe eller Trawl har været anvendt, med
Den norske Nordliavsexpedition. G. O. Sars: Crustacea.
In working up the very extensive material embracing the
Crustaceans collected and observed on the Norwegian
North-Atlantic Expedition, practical reasons have induced
me to divide my Memoir into three sections. The second
section gives a complete systematic enumeration of the species
observed on the Expedition, as also a statement of the localities
where found, together with brief remarks on occurrence and
distribution. In the third section are set forth the chief
conclusions to which a study of the Crustacea from the
North-Atlantic Expedition has led. partly in regard to the
general character of the Fauna, and partly with reference
to its supposed movements (migration of animal forms), as
also to the physical and meteorological conditions which
appear to determine the occurrence ol’ species. The first
section has been devoted exclusively to detailed descriptions
of certain forms either new to science or which, up to the
present time, have been incompletely diagnosticated and
figured. Meanwhile, I must not fail to observe, that as a
rule I have not included forms previously established as
belonging to the Norwegian littoral fauna. Such forms will
be fully treated of elsewhere, viz. in a work on the
Crustacea of Norway, which I purpose beginning at an early
date.
For the Plates accompanying this Memoir, all of the
figures were furnished by myself; and the use, without
exception, of the Camera Lucida affords a sufficient guarantee
for their accuracy. Most of the habitus-representations
are facsimiles of coloured drawings, executed by myself on
the several cruises of the Expedition, from fresh and living
specimens.
The new forms described in the first section of this
Memoir are briefly characterized in the two following
preliminary papers, both published in ■’Archiv for Mathematik
og Naturvidenskab’: —
1. — Prodromus descriptions Crustaceorum et
Pycno-gonidarum, qvæ in Expeditione Norvegica anno 1876
obser-vavit G. O. Sars.
2. — Crustacea et Pycnogonida nova in itinere 2do
et 3tio Expeditions Norvegicæ anno 1877 & 1878 coUecta
(Prodromus descriptions).
To avoid repetition in stating the localities. I have
given below a List of all the Stations at which the dredge
or the trawl was used, along with the date, position of the
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