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ON GENERA AND SPECIES. 



garden and herbarium collections of Ferns as zealously 

 as I have done, whether their criticisms be favourable or 

 unfavourable to my views as regards the genera of Ferns, 

 it is hoped that their observations will, as Sir William 

 Hooker said, be the means of throwing "a new light on 

 the study of Ferns, a light which cannot fail to aid the 

 researches of future writers." 



