viii PREFACE 



dens, Kew; others have been given to the British 

 Museum and to the Botany School, Cambridge. 

 Rock specimens were divided between the British 

 Museum and Cambridge. The majority of the 

 fossil plants, of which nearly rooo specimens were 

 obtained, will be sent to the British Museum after 

 their description has been completed; the rest will 

 be kept at Cambridge. 



I am grateful to my friends Mr Peace, the Uni- 

 versity printer, and Mr S. C. Roberts, Secretary 

 to the Syndics of the Press, for many helpful 

 suggestions and for the interest they have taken in 

 the publication of this book. 



I am indebted to my wife for the drawings 

 reproduced in Figs. 12 and 46, which were made 

 from my rough sketches, and to my daughter 

 Phyllis for Map B and the Chart reproduced on 

 page 24. To Mr Holttum I am indebted for the 

 photographs reproduced in Figs. 9, 18, 22, 2531, 

 44, and to Mr Erling Porsild for Figs. 23 and 43. 

 Fig. i is from a photograph taken by the Greenland 

 photographer, John Moller, of Godthaab. With 

 these exceptions the figures are from negatives 

 taken by myself with a Kodak camera. 



A. C. SEWARD 

 August 5, 1922 



