PREFACE Vll 



of Caen : he was a generous friend to whom one never appealed 

 in vain for assistance. Through the kindness of the Director 

 of the Indian Geological Survey I have been able to examine 

 several fossils from the Calcutta Museum described by Oldham 

 and Morris and by Feistmantel. With the Director's permission 

 several photographs and drawings made for a forthcoming 

 paper to be published by the Indian Survey are reproduced 

 in this volume. I take this opportunity of thanking friends 

 in Australia who recently afforded me facilities for examining 

 fossil plants in their charge, and I would especially thank 

 Mr A. B. Walkom of the University of Brisbane, who has 

 recently undertaken an investigation of the rich plant-beds 

 in the Ipswich district, for all that he did to enable me to make 

 the most of a very short time available for palaeobotanical 

 work. 



For the loan of specimens and for other help I am indebted 

 to Prof. Bayly Balfour, Prof. Bower, Prof. Margaret Benson, 

 Prof. Oliver, Sir David Prain, Dr Smith Woodward, Prof. Weiss, 

 the Director of the Geological Survey, Dr A. H. Church, Dr 

 Arber, and other friends. I would also acknowledge a debt, 

 by no means inconsiderable, to my Colleague Mr Hamshaw 

 Thomas. Among younger friends in the Cambridge Botany 

 School to whom I am indebted I wish particularly to thank 

 Miss Euth Holden, Miss Bancroft, Mr Sayers, Mr Dutt and 

 others who have rendered me willing help. 



In the List of Illustrations mention is made of Corporate 

 Bodies and individuals from whom blocks have been obtained, 

 and I am grateful to them for readily responding to my 

 applications. 



My Wife, though prevented by more urgent calls in the 

 later stages of my task from giving as much time to the illustra- 

 tions as in the two former volumes, has contributed several 



