KEYS TO THE FERNS OF BORNEO 
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ment of the major political divisions of Borneo in which 
each species has been collected, and a rough statement 
of the supposed or known range outside of Borneo. 
But few synonyms are included, except where the 
name adopted is a new combination. Thirty-three 
species, which are known elsewhere, are now recorded 
from Borneo for the first time. The diagnoses of the 
“new species” appearing in this list, 44 in number, are 
being published in the Philippine Journal of Science. 
In the preparation of keys and list, I have had the 
use of practically complete (so far as I know, complete) 
literature* regarding the ferns of Borneo, and of the 
Herbarium of the Bureau of Science and my own Her¬ 
barium. Included in these are the following collections: 
First: A small number of specimens in the Herbarium 
of the Bureau of Science, received in exchange, and 
collected by Bishop Hose and various Dutch expeditions. 
Second: Collections made by Dr. F. W. Foxworthy- 
on several visits to Sarawak and North Borneo. 
Third: Collections made by native collectors employed 
by the Bureau of Science, working under the direction of 
the Sarawak Museum. 
Fourth: Very valuable collections by Mr. C. J. Brooks, 
then a chemist employed by the Borneo Company in 
Sarawak, who was particularly interested in ferns and 
exceptionally discriminating in their collection. 
Fifth: Collections sent to me by the Curator of the 
Sarawak Museum for determination, including specimens 
collected by himself (Mr. Hewitt or Mr. Moulton), and 
unidentified specimens collected at previous dates. 
* In connection with the preparation of bibliography of Bornean 
botany (Sur. Mus. Journ. Vol. II. No. 6. 1915, pp. 99-136) Mr. Merrill pre¬ 
pared a card catalogue of the plants reported from Borneo. This list, 
with the citations, has naturally been of the greatest possible use to me. 
