

PREFACE. 



It is my intention to take up in tliis and the succeeding Supple- 

 ments to my Handbooks on Malayan Ferns and Fern Allies the descrip- 

 tions of those genera and species that have heen discovered since the 

 Handbooks were finished, and such as are new so far as the Malayan 

 Islands (including the Malay Peninsula, the Philippines and New G-uinea) 

 concerned, however well-known in other localities. 



I shall take into consideration, as far as possible, the modified con- 

 ceptions caused by new discoveries, and in cases where I am unable to 

 agree with the new conceptions, I shall at any rate insert the new names 

 as synonyms for the old. 



Each supplement will be followed, if necessary, by a sheet for add- 

 itions and modifications, to affort opportunity to those using the Hand- 

 books quoted above, to make such corrections as may be found advisable. 



Where the new discoveries or conceptions require, that species be 

 referred to other genera than those previously given, I shall transcribe 

 the entire diagnoses, unless the number is too large, in which ease I shall 

 content myself with simply referring the reader to the names and 

 descriptions where they occur in the Handbooks. 



The numbers within brackets, placed before the names of the species, 

 indicate their position in the sequence followed in the keys of the Hand- 

 books, but only approximately for the new or supplementary species 

 (marked a, 6, c, etc.). 



As far as necessary modifications will be given in order to make the 

 keys fit, as much as possible, for the new or accessory species. 



BuitenzoeCt, January 1916. v. A. v. R. 



