2l8 TlMEHRI. 
marginal border not more than ^-^ in. broad. Found both 
upon the upper slopes of the mountain and in the neigh- 
bourhood of the encampment. 
These two interesting novelties both fall under the genus. 
Pterozonium of Fee, figured at tab. i6of his Genera Filicum. 
The only species known previously is the very rare Gymno- 
gramme reniformis, Mart., figured Icon Crypt. Bras. tab. 26 
and also in Hooker's 2nd Century of Ferns tab. 9 and on 
tab 49 of the Fern volume of Flora Brasiliensis. The two 
new species are very distinct both from one another and 
G. reniformis. In G. cyclophylla the sori form a narrow 
band just within the margin ; in G. reniformis a broad semi- 
circle a distinct space within the margin ; whilst in 
G. elaphoglossoides they cover the whole surface except a 
narrow border. 
194. Gymnogramme Schomburgkiana, Kunze, Upper slopes of the 
mountain. 
197. Gymnogramme hirta, Desv. Upper slope of the mountain 
New to Guiana. 
150. Gymnogramme flexuosa, Desv., Upper slope of Roraima, 
also new to Guiana. 
Enterosora, Baker, genus novum. Sori oblongi vel oblongo- 
cylindrici exindusiati ad venas decurrentes intra frondis 
laminam orti, demum ad frondis faciem inferiorem rimis 
angustis obliquis imperfefte obvii, vena^ pinnatx, venulis 
paucis ascendentibus prope frondis marginem anastomo- 
santibus et areolas steriles hexagonas sori unico centrali 
includentes formantibus. 
Most resembles Gymnogramme, from which it differs 
mainly by having the sori immersed within the tissue of the 
frond and only appearing very partially on the lower surface 
even in a mature stage. 
184 (ex parte) Enterosora Campbellii, Baker, n. sp. The only 
species. Upper slopes of the mountains, with Polypodium 
trifurcatum. Rootstock cylindrical, suberect, densely clothed 
with small brown membranous lanceolate palea;. Stipes 
slender, brown, ereft, wiry, 4-5 in. long, with a few very incon- 
spicuous spreading fibrillose palea; downwards. Lamina 
oblanceolate simple, subcoriaceous, glabrous, 6-8 in. long, 
