140 



North-America via Iceland and Greenland. But if this bridge 

 was in existence at that period, it must certainly have been 

 broken through by the sea in one or more places, so that 

 it formed no hindrance to the propagation of the same fauna 

 in both oceans. But there is no reason to think, that the 

 strait or straits constituted a hindrance to the propagation of 

 terrestrial animals and plants. 



Although by the finding of the marine Tertiary fossils the 

 Danish expedition to East-Greenland in 1900, has greatly ad- 

 vanced the knowledge of the Tertiary formations of the Arctic 

 regions, still much is left of which we have no knowledge, 

 and further new discoveries will be received with the greatest 

 interest. 



