viii Preface 



and reliable account of the various forms in a manner which would not 

 confuse the student, sectional treatment was deemed essential. It must 

 always .be remembered that in the Green Algse taxonomy is intimately bound 

 up with cytology and life-histories. 



The bibliography of the various groups does not pretend to be complete, 

 but. consists only of the works which have been cited in the text. It will, 

 however, be found to contain almost all the publications of importance which 

 the student may wish to consult. 



There are 271 illustrations comprising 1284 lettered or numbered figures, 

 of which 681 are from original drawings by the author. 



The author wishes to express thanks for permission to reproduce certain 

 figures to Professor N. Wille of Christiania, to Professor C. A. Kofoid of 

 Berkeley, California, to Dr F. Borgesen of Copenhagen, to Professor F. Oltmanns 

 of Freiburg, and to Mr E. N. Transeau of Columbus, Ohio ; his best thanks 

 are also due to Mr W. B. Grove of Birmingham for kindly consenting to read 

 through the whole of the final proofs. 



There has been considerable delay in the publication of this volume, 

 largely owing to a prolonged illness of the author in 1913-14 and partly 

 owing to conditions which have arisen as a result of the present calamitous 

 European upheaval. 



G. S. WEST. 



THE BOTANICAL LABORATORY, 

 THE UNIVERSITY, 

 BIRMINGHAM. 

 June, 1916. 



