D Holothurider, som ere indsamlede paa den norske 
Nordhays-Expeditions trende  Undersøgelsesreiser 1 
Aarene 1876, 1877 og 1878, have vi underkastet en kritisk 
Gjehnemgaaelse, hvis Resultater vi her fremlægge. 
Det viser sig, at Samlingen indeholder 17 Slægter, 
hvoraf 5 ere nye, og 25 Arter, af hvilke 6 ere nye for 
Videnskaben. Tages der Hensyn til, under hvilke Bredde- 
og Længdegrader de væsentligste Fund ere gjorte, tor det 
indrømmes, at Antallet er betydeligt, og sikkert er det, at 
de arktiske Have ere blevne berigede med interessante 
Former for denne Dyreklasses Vedkommende. 
For at opretholde Expeditionens Prioritetsret have vi 
i *Nyt Magazin for Naturvidenskaberne” offentliggjort flere 
foreløbige Afhandlinger over de nye Holothurider, til hvilke 
vi maa henvise. 
he Holothuriidæ obtained on the three exploring voy- 
ages of the Norwegian North-Atlantic Expedition, in 
the years 1876, 1877, and 1878, we have submitted to a 
critical review,. the results of which will be found em- 
bodied in the present Memoir. 
The whole collection comprises 17 genera, 5 of which 
were previously unknown, and 25 species, 6 of ‘them new 
to science. If regard be had to the latitude and longitude * 
of the localities in which the most important of the speci- 
mens were met with, the total number secured will,: we 
think, be deemed considerable; and it is certain that, as 
regards at least this class of animals, interesting forms have 
been added to the Fauna of the Polar Seas.. 
With the object of asserting the right of priority to 
which the Expedition can lay claim, we have published in 
“Nyt Magazin for Naturvidenskaberne” several preliminary 
papers on the new Holothuriidæ, to which we refer. . 
Den norske Nordhavsexpedition. Danielssen og Koren: Holothurider. 
