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Bearbeidelsen af de paa den norske Nordhavsexpedition
fundne Asteroidea har været forbunden med ikke faa
Vanskeligheder.
Dels har Materialet været ringe, stundom kun 1
Exemplar, dels have vi savnet et tilstrækkeligt
Sammenlignings-material, dels er den derhen hørende Literatur saa
overordentlig spredt i fast alle Jordens Tidsskrifter, og endelig
er Beskrivelsen af mangfoldige Arter ufuldstændig og uden
at være ledsaget af Tegninger, saa det ikke’ har været os
muligt, uagtet al anvendt Møie, at kunne med Sikkerhed
diagnostisere dem, hvorfor det ogsaa tør hænde, at en eller
anden af de i denne Afhandling som nye opførte Arter
falder sammen med enkelte af de saa ufuldstændigt beskrevne
Arter. Men om saa skulde være Tilfældet, trøste vi os
med, at den Beskrivelse, vi levere ledsaget af Afbildninger,
skal for andre Forskere blive en Veiledning til at undgaa
de Skjær, vi have stødt paa.
/
Paa den følgende Side findes Tabeller over de
Stationers geografiske Beliggenhed, hvilke ere omtalte i
Arbeidet over Asteroidea.
Bergen, 29de April 1882.
The revision of the Asteroidea discovered on the
Norwegian North-Atlantic Expedition, has been atttended with
no little difficulty.
Various causes have prevailed, to make it impossible
for us to diagnose our specimens with certainty;
notwithstanding our utmost efforts to do so. Our difficulties have
arisen, partly, from the paucity .of material met with;
consisting at times, of only a single specimen; and, partly,
from the absence of sufficient supply of subjects for
comparison. It also happens, that the literature relating to the
subject is vastly spread through journals from almost all
quarters of the globé; and the descriptions contained in
these, are aften insufficient, from being unaccompanied by
illustrative drawings. It may consequently occur, that one
or other of the species presented in this memoir as new,
may coincide with one or other of these insufficiently
described ones. Should this prove to be the case; we comfort
ourselves with the reflection, that our memoir, accompanied
as it is, by illustrative drawings, will serve other
investigators as a guide, enabling them to overcome the
difficulties which we have met with in our researches.
On the two following pages will be found, tables of
the geographical position of the stations which are referred
to in our memoir on Asteroidea.
Bergen 29"1 April 1882.
Den norske Nordhavsexpedition. Daiiielssen og Koren: Asteroidea.
1
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