VI PEEFACE. 



Like Malayan Ferns, the present volume makes no pretence of being 

 either an exhaustive or a flawless work, and I shall feel greatly obliged 

 for any communications tending to point out errors or wrong views not 

 resulting from a difference of conception. 



Finally I wish to express in this place my sincere thanks to Prof. 

 Dr. G-. HIEEONYMUS, of Steglitz, for the kindness with which he assisted 

 me in my Selaginella study. 



BUITENZOKG, July 1914. v. A. v. R. 



