A NEW MALAYAN FERN GENUS. 
BY GAPT. C. R. W. K. VAN ALDERWERELT VAX ROSEXBURGH. 
STENOLEPIA, r. i, v. H. 
Cystopteridi affinis. Sori subglobosi, hand terminales sed ad 
venas vennlasve dorsales vel ad venarum furcarum angulos positi. 
Indusium extrorsum, parvum, angustiim, integriim, demiim defle- 
xum, basi angiistata ad receptaculum elevatum solum (haucl ad 
venam parenchymaque) affixiim, decidimm. Annulus Polypodiace- 
arum more verticalis, incompletus. 
The single species of this genus has originally been described 
by Blume as Aspidiiim tuiste and was later on known under the 
name of Alsophila tristis, BI., Cystopteris tristis, Mett. and DavalUa 
tristis, Rac. 
A more exact examination, however, of the specimens gathered 
by Db M. Raciborski proves it to belong neither to Aspidium nor 
to one of the other genera quoted above. 
Raciborski has gathered some young and adiüt fronds only. 
On the young fronds the sori are all destitute of an indusium, but 
the ripe ones have still several sori provided with an indusium, 
which is evidence that the indusium is undoubtedly present (see 
Raciborski’s diagnosis in Flor. Btz.L), but it is deciduous in age 
and very caducous in dried young material. 
The plant superficially resembles in appearance and mode of 
growth Diacalpe aspidioides, BI. and is alliedto the genus Cystopteris. 
It agrees with the latter in having the sori subglobose, placed on 
the back of a vein or veinlet or at the forking of a vein, and 
provided with an extrorse indusium; it differs from the said genus 
in having the indusium not hood-shaped but narrow, spathulato- 
ligulate, rigid, entire, small, too small to cover the sorus perma- 
nently, and attached by its gradually narrowed base to the receptacle 
only (as in Leptolepia) and not to the vein and parenchyma. 
