226 Yapp. — Two Malayan ‘ Myrmecophilous ’ Ferns. 
which are reflexed when mature upon the upper surface of 
the frond. This is possibly an adaptation to prevent the 
scattering of the spores unless a considerable wind is blowing. 
This plant is only found on the topmost branches of trees, 
and so it is during a wind that the spores would have the 
best chance of reaching their ultimate destination. 
7. Though formerly placed in different genera, both the 
external features and internal structure of these two Ferns 
indicate that they must be regarded as closely allied species. 
In conclusion, I desire to express my thanks to Mr. A. C. 
Seward for his valuable advice and suggestions during the 
progress of this investigation. Also to Professor A. Forel, 
Dr. Sharp, and Mr. F. G. Sinclair for information concerning 
the ants and other animals found in the galleries of the 
Ferns. 
