X PREFACE 



Use has also been made of figures from the following periodicals 

 to the editors of which I tender thanks, although conditions have 

 made it impossible to get into touch with them : Archivfur Protisten- 

 kunde, Zeitschriftfiir Botanik, Revue gener ale de botanique, Hedwigia, 

 Berichte der Deiitschen Botanischen Gesellschaft, Jahrbiicher fur 

 Botanik^ Planta, Flora, Beihefte zum Botanischen Zentralblatt, Le 

 Botaniste, Osterreichische botanische Zeitschrift, Lunds Universitets 

 Arsskrifty Botaniska Notiser, Revue algologique, Protoplasma, Arkiv 

 for Botanik, Svensk botanisk Tidskrift, Nova Acta Regiae Societatis 

 scientiarum Uppsaliensis, Kongliga Svenska Vetenskapsakademiens 

 Handlingar, Kongliga Fysiografiska Sdllskapets iLundForhandlingar. 



The authors of the various figures are acknowledged in the 

 legends, and references to the more important papers will be found 

 at the end of the appropriate section. 



Much of this book has been inspired, and indeed used, during 

 class visits to the marine laboratories at Plymouth, Port Erin, 

 Lough Ine and Millport, and I can think of no better way of 

 becoming acquainted with the algae. These visits were initiated 

 under the tutelage of Mr A. G. Lowndes and to him must go much 

 of the credit for my interest in this branch of Botany. 



I should also like to acknowledge gratefully the encouragement 

 and help given me by Professor F. T. Brooks, F.R.S., and Professor 

 F. E. Fritsch, F.R.S., whilst a special debt is due to Dr D. Catcheside 

 who read and criticized the whole manuscript. I am also indebted 

 to Dr H. Hamshaw Thomas, F.R.S., who read the section on Fossil 

 Algae, and to Dr G. C. Evans who read the chapter on Physiology 

 and the one on Ecological Factors. Dr Godwin also very kindly 

 read and criticized a portion of this volume whilst it was in 

 proof. Finally, there has been the help and encouragement given 

 me by my wife, and it is in no small measure due to her unsparing 

 help in the drawing of the figures and the preparing of the Index 

 that this book sees the light of day. 



V. J. C. 



Gonville and Caius College 

 May 1 94 1 



