Indlevcret i Jamn 



1881. 



Received January 1881. 



"Flor jeg gaar over til Behandlingen af det mig overdragne 

 -i- Materiale, skal jeg forudskikke en kort Bemærkning 

 over den Form hvori det vil fremkomme. 



Arbeidet vil blive delt i to Afdelinger. I den første 

 behandles Alt, hvortil der kan knytte sig mere Interesse 

 og give Anledning til tiere Bemærkninger end den vertikale 

 og horisontale Udbredelse; ber vil saaledes alle de nye 

 Former blive beskrevne og afbildede og nogle Slægter vil 

 for de aretiske Representanters Vedkommende faa en mono- 

 grafisk Behandling. Den anden Afdeling kommer at inde- 

 holde en katalogisk Fortegnelse over samtlige under Expe- 

 ditionens 3 Togter i 1876. 1877 og 1878 fundne Mollusk- 

 arter med Angivelse af Findesteder og Dybdeforholde. En 

 Liste over Skrabestationerne med Stedsangivelse. Dybde og 

 Temperatur ved Havbunden vedføies og hertil refererer de 

 ved Arterne angivne Stations Nummere. Foruden disse 

 Skrabe-Stationer, der alle foregik fra Skibet, blev der gjort 

 Baadskrabninger ved Reykjavik (Island). Jan Mayen, Bodø. 

 Tromsø, Hammerfest, Norskøerne (Spitsbergen). Magda- 

 lenabay (Spitsbergen) og Adventbay (Spitsbergen). 



Before recording the results of his labours in working 

 up the materials collected on the Norwegian North- 

 Atlantic Expedition, the author will briefly notice the form 

 he has selected for their arrangement. 



The present Memoir will consist of two sections. In 

 the first, is comprised everything of interest not directly 

 connected with the phenomena of vertical and horizontal 

 distribution. There, accordingly, all the new torms have 

 been described and figured, and a few genera, with respect 

 to their Arctic representatives, made the subject of mono- 

 graphic treatment. The other section contains a Cata- 

 logue of all the Mollusca obtained on the three cruises of 

 the Expedition, in 1876, 1877, and 1878, along with a 

 statement of the locality and the depth in which each 

 species was met with. A List of Dredging-Stations, with 

 the latitude and longitude annexed, as also the depth and 

 temperature at the bottom, is likewise given; and the 

 numbers of Stations, noted for all the species, refer to this 

 List. Exclusive of the zoological work prosecute'd at the 

 dredging-stations. all of which was undertaken in the open 

 sea, dredging was also carried on from boat — at Rey- 

 kjavik (Iceland), Jan Mayen, Bodø, Tromsø, Hammerfest, 

 the Norway Islands (Spitzbergen), Magdalena Bay (Spitz- 

 bergen), and Advent Bay (Spitzbergen). 



Den norske Nordhavsexpedition. Herman Friele: Mollusca. 1. 



