188 EILIFDAHL 



of where the Amphi-Atlantic plants and animals survived the glacial ages 

 after the connection had been broken is interesting. 



The most reasonable method to obtain the information desired seems to be 

 by means of deep sea borings since a connection between Scotland and 

 Iceland and also between Iceland and Greenland must have affected pro- 

 foundly the oceanographic situation in the seas adjacent to the bridges, and 

 this should be noticeable in the character of the sediments. 



Some relevant information might also be obtained by closer study of 

 Icelandic Interglacial peat deposits which have been preserved from subse- 

 quent destruction by lava flows. By proper dating and analysis of such 

 deposits more might be learned about the time when the different components 

 of the fauna and flora immigrated to Iceland. 



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