KEYS TO THE FERNS OF BORNEO 
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17. H. Hosei Copel. n. sp. 
Sarawak (Mt. Trekan, alt. 600 m). 
Local. 
18. H. perfissum Copel. n. sp. 
Kinabalu (alt. 3,700 m.). 
Local. 
ig. H. Lobbii Moore, var. minor Rosenst. 
Dutch Borneo (the variety). 
“ Malaya,” Assam (the species). 
20. H. edentulum (v. d. B.) C. Chr. 
Dutch Borneo. 
Assam. 
21. H. holochilum (v. d. B.) C. Chr. 
Sarawak, Dutch Borneo, Kinabalu. 
Java. 
H. Boschii Rosenst, of which var. euryglossa Rosenst. 
is reported from Dutch Borneo and Sumatra, is a new 
name for Lcptocionum affine v. d. B., and usually regarded 
as identical with H. liolocliilum . 
22. H. BLANDUM Racib. 
Kinabalu (coll. Miss Gibbs; not in our collections). 
Java. 
23. H. Bakeri Copel. nom. nov. 
Trichomanes denticulatnm Baker. 
Sarawak, North Borneo. 
Endemic. 
This is regarded, on Christ’s authority, as identical 
with H. prcetervisum Christ, of Samoa, but the descrip¬ 
tions differ materially; and Sarawak specimens which 
seem to me to represent T. denticulatnm cannot be 
matched even approximately with Christ’s diagnosis nor 
with his figure in Farnkr. der Erde . Christ as well had 
Sarawak specimens, and it is of course possible enough 
that they are different from mine; in that case, one of 
them is undescribed, or his were not T . denticulatnm . 
