I ..Catalog der auf der norwegischen Xordmeerexpe- 

 ■dition bei iSpitzbergeii gefundenen Mollusken" ') henleder 

 Friele opmærksomheden paa, at der i Ishavet søndenfor 

 Spitsbergen findes døde skaller af grundtvandsmollusker 

 spredt over de store dyb og senere har den danske Ingolf- 

 «xpedition paatruSet det samme fenomen i havdybet mel- 

 lem Jan Mayen og Island. Friele har villet forklare dette 

 fenomen ved en istransport, idet skalresterne af isen er 

 ført ud paa dybet. Dr. A. S. Jensen, Kjobenhavn, mener 

 derimod i sin afliandling „0m levninger af Grundtvandsdyr 

 paa store Havdyb raelleni Jan Mayen og Island-'-), at „der 

 i kvartærperioden raaa have fundet en sænkniug sted, livis 

 maxinuim ikke kan anslaaes til ringere en henved 8000 

 fod (ca. 2500 meter)''. De grundtvandsdyrlevninger man 

 der finder skulde altsaa være fossile rester, som er igjen- 

 liggende paa sit oprindelige hjemsted. 



Da disse fund bar faaet en større betydning ved at 

 <Ie muligens kan give oplysning om geologiske forhold, hid- 



') .Tahrb. Deutsch. Mal. tresellscb., vol. 0, 1879, p. 204. 

 -) Vidensk. Meddel., 1900, p. 229. 



In the -Catalog der auf der norwegischen Nordmeer 

 expedition bei Spitsbergen gefundenen Mollusken"), Friele 

 draws attention to the fact that in the Arctic Ocean south 

 of Spitsbergen, empty sliells of sliallow-water molluscs are 

 found scattered over the great depths, and the Ingolf 

 Expedition subsequently met with the same phenomenon 

 in the ocean depth between Jan Mayen and Iceland. 

 Friele has attempted to explain this phenomenon by the 

 agency of ice, the shell-fragments being carried out into 

 deep water by the ice. Dr. A. S. Jensen, Copenhagen. on 

 the other hand, in his treatise „0m Levninger af Grundt- 

 vandsdyr paa store Havdyl) mellem Jan Mayen og Island"^), 

 thinks that 'in the Quaternary a subsidence must have 

 tåken place, of wliich tlio maximum cannot be jmt at less 

 than about 8000 feet (about 2,o00 metres)'. The remains 

 of shallow-water animals found there, would thus be fossil 

 remains, left lying in their original habitat. 



As these finds have acquii'ed greater importance from 

 their possible ability to ailbrd information respecting geo- 



') Jahrb. Deutsch. Mal. GeseUsch., vol. 0, 1ST9, p. 264. 

 2) Yidensk. Meddel., 1900, p. 229. 



