Cambridge Botanical Handbooks 
Edited by A. C. Seward and A. G. Tansley 
THE FERNS 
(FILICALES) 
TREATED COMPARATIVELY WITH A VIEW 
TO THEIR NATURAL CLASSIFICATION 
VOLUME I 
ANALYTICAL EXAMINATION 
OF THE CRITERIA OF COMPARISON 
BY 
F. 0. BOWER, ScJX, LL.1X, E.R.S. 
With a frontispiece and 309 illustrations 
Royal 8vo. 30s net 
CAMBRIDGE UNIVERSITY PRESS 
C. F. Clay, Manager; London: Fetter Lane, E.C. 4 
