CONTENTS 



Page 

 Foreword, by Askell and Doris Love ix 



Introduction, by Askell Love xi 



Some chapters of the Tertiary history of Iceland, by Trausti Einarsson 



(with 4 figures) 1 



The geological knowledge of the North Atlantic climates of the past, by 



Martin Schwarzbach (with 1 figure) 1 1 



The Atlantic floor, by Bruce C. Heezen and Marie Tharp (with 2 



figures) 21 



Recent studies on the geology of the Faeroes, by Joannes Rasmussen 



(with 6 figures) 29 



Phytogeographical connections of the North Atlantic, by Eric Hulten 



(with 24 figures) 45 



The problem of late land connections in the North Atlantic area, by 



Carl H. Lindroth (with 6 figures) 73 



Taxonomic differentiation as an indicator of the migratory history of 



the North Atlantic flora, with especial regard to the Scandes, by 



John Axel Nannfeldt (with 5 figures) 87 



Phytogeographical problems in Svalbard, by Olaf T. Ronning (with 2 



figures) 99 



Amphi-Atlantic zonation, Nemoral to Arctic, by Hugo Sjors (with 



3 figures) 109 



Distribution of the terricolous Oligochaetes on the two shores of the 



Atlantic, by Pietro Omodeo (with 15 figures) 127 



Historical and taxonomical aspects of the land Gastropoda in the 



North Atlantic region, by Henrik W. Walden (with 3 figures) 1 53 



Plant migrations across the North Atlantic Ocean and their impor- 

 tance for the paleogeography of the region, by Eilif Dahl (with 2 



figures) 173 



Dispersal and survival of plants, by Doris Love 189 



On the history and age of some Arctic plant species, by Emil Hadac 



(with 2 figures) 207 



Problems of immigration and dispersal of the Scandinavian flora, by 



Knut F^egri 221 



Survival of lichens during the Glacial Age in the North Atlantic basin, 



by Zdenek Cernohorsky 233 



vii 



