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cs, (å 
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@0 Greenwich: 
I Catalog der auf der norwegischen Nordmeerexpe- 
dition bei Spitzbergen gefundenen Mollusken**) henleder 
Friele opmerksomheden paa, at der i Ishavet søndenfor 
Spitsbergen findes dgde skaller af grundtvandsmollusker 
spredt over de store dyb og senere har den danske Ingolf- 
expedition paatruffet det samme fænomen i havdybet mel- 
lem Jan Mayen og Island. Friele har villet forklare dette 
fænomen ved en istransport, idet skalresterne af isen er 
ført ud paa dybet. Dr. A. S. Jensen, Kjøbenhavn, mener 
derimod i sin afhandling ,Om levninger af Grundtyandsdyr 
paa store Havdyb mellem Jan Mayen og Island**), at ,der 
1 kvartærperioden maa have fundet en seenkning sted, hvis 
maximum ikke kan anslaaes til ringere en henved 8000 
fod (ca. 2500 meter)“. De grundtvandsdyrlevninger man 
der finder skulde altsaa veere fossile rester, som er igjen- 
liggende paa sit oprindelige hjemsted. 
Da disse fund har faaet en storre betydning ved at 
de muligens kan give oplysning om geologiske forhold, hid- 
) Jahrb. Deutsch. Mal. Gesellsch., vol. 6, 1879, p. 264. 
*) 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 shells of shallow-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 ,Om Levninger af Grundt- 
vandsdyr paa store Havdyb mellem Jan Mayen og Island“?), 
thinks. that ‘in the Quaternary a subsidence must have 
taken place, of which the maximum cannot be put at less 
than about 8000 feet (about 2500 metres)’. The remains 
of shallow-water animals found there, would thus be fossil 
remains, left lying in their original habitat. - 
As these finds have acquired greater importance from 
their possible ability to afford information respecting geo- 
1) Jahrb. Deutsch. Mal. Gesellsch., vol. 6, 1879, p. 264. 
2) Vidensk. Meddel., 1900, p. 229. 
