pleri, Blume, Enum. Pl. Javz et Insularum adjacentium, Fasc. 2. p. 135 ; and it seems to have been 
found in Java both by Dr. Horsfield and Dr. Blume. It has no characters by which it may be 
distinguished from Po/ypodium as a genus; and that of Reinwardt's Dipteris was simply ** Capsula 
in disco frondis sparss solitariz: aut confert».  Indusium nullum." As a species, it differs from 
P. JIf'allichii 1n its strongly-serrated fronds, which are glaucous on the underside, and have the 
primary serves throwing out branches, after they have attained to the segments, and consequently 
several parallel nerves are seen within each division of the frond; whereas, in P. JZ allichii, the 
forking always commences below the base of each division or segment, and a pair of strong nerves 
run through its length, uniting again just below the apex. The lesser nervation is the same in 
both, and highly curious. From the main nerves there branch off at equal distance and at right 
angles, many strong vessels, here and there united by transverse bars in the middle part of the frond, 
or between the principal nerves; the lateral ones do not reach the margin, but are connected bya 
waved longitudinal line, a little within the margin. Thus, these form transversely-oblong and very 
conspicuous reticulations, within which are somewhat four-sided reticulations, which are also, par- 
ticularly on the underside, conspicuous to the naked eye: these, again, bear within their areole 
smaller and more irregular meshes, and within these, if a good lens be employed, especially if the. 
frond be held up between the eye and the light, the ultimate reticulations may be seen, excessively 
minute, and resembling semipellucid points. 
