THE second edition of Hooker and Baker's Synopsis 

 Filicum (now out of print) brings the enumeration of 

 genera and species up to the year 1874. Since that date 

 a large number of novelties have been discovered and described 

 and so much fresh light has been thrown by morphological 

 investigation on the taxonomic relations of the different groups 

 of plants included under FlLlCES that it is time for a new 

 handbook. As there is not any chance of this being produced 

 at present, I propose in this paper to attempt a general sum- 

 mary of what has been added to our knowledge in respect to 

 species during the last sixteen years. I do not intend to describe 

 again the plants that have been described already ; but merely 

 to indicate their position in the sequence followed in the 

 Synopsis, in the same way as in the supplement published in 

 the second edition. Most of the larger collections that have 

 been received at Kew have been already published in Britten's 

 Journal of Botany and in the Transactions and Journal of the 

 Linnean Society, but a considerable number of new species 

 which have been received from time to time are still unnoticed. 

 Of many of the plants which have been described by other 

 authors we possess authentic specimens. Some of these I can 

 only place as synonyms, and others, measured by the standard 



