398 
away, but it is not without interest to note that there has been 
made several direct observations which confirm that it is really 
the case. 
The records of the occurrence of shallow water shells on the 
ice which I have hitherto observed are as follows: 
1) Måbius writes in ,,Mollusken" etc. in the report from ,,Die 
zweite deutsche Nordpolarfarht", Leipzig 1874, Bd. 2: ,,Neben 
den Eislåchern, aus denen die Wallrosse auftauchen -lagen 
Haufen von Schalen" [Mya truncaia). 
2) Collin states in the report on the Mollusca from the Danish 
Dijmphna-Expedition (1887) that Mytilus edulis L. has been 
found on floating ice in the Kara-Sea. (9 living specimens and 
some valves)!). 
3) Edv. Bay remarks?), that shells are present in the clay trans- 
ported by the ice-stream which is moving along the east-coast 
of Greenland. He mentions two species: Astarte borealis Chemn. 
(= 4. semisulcata Leach), and Lyonsia arenosa Måller. 
4) Posselt writes?) that the Danish East-Greenland Expedition 
of 1892 brought home two specimens of Lyonsia arenosa found 
on floating ice near Jan Mayen. 
The found shallow-water shells may, perhaps, partly have lain 
on the bottom of the sea for thousands of years. What number 
of shells the floating ice in the course of time may have been 
able to deposit here is rather incalculable. In my opinion it is 
1) In a previous paper: ,Om Aflejringen af Molluskernes. Skaller” etc. 
p. 43 Anm. (Vid. Med. Naturh. Foren. Kjøbenhavn 1901) I have 
wrongly attributed this statement to Leche. 
2) Edv. Bay: Drivisens Transport af Grus, Ler og Sten langs Grøn- 
lands Østkyst" etc. Meddelelser om Grønland. Hefte 19. Kjøben- 
land. Hefte XIX. Kjøbenhavn 1896 p.75. I. ,Grønlands Brachio- 
poder og Bløddyr". Meddelelser om Grønland. Hefte XXIII. Kjøben- 
havn 1898 p. 92. (Posselt probably refers to the same finding 
as Bay.) 
