FERNS OF NORTH-WEST MADAGASCAR. 5 
over beneath. Lower pinne oblong-lanceolate, a foot or more long; 
pinnules sessile, lanceolate, an inch broad, cut down to the rachis 
into oblong obtuse crenate tertiary segments. Veins forked opposite 
the lobes of the tertiary segments. Sori distant from the midrib, 
one to each lobe of the tertiary segments. Indusium reniform, 
glabrous, persistent. — Allied to N. sips: N. Boivini, and the 
West Indian N. amplum 
N. pennigerum Hook. 
N. cicutarium Baker 
Polypodium Gilpine Baker. 
od ascens Sw. 
339*. aie nice ium Ss) Lastii, n. sp. Rootstock 
wide-creeping, epigzeous, + in, diam.; palex en brown, lanceo- 
late. Stipes sauiads nearly naked, 5-6 in. long. Frond oblong- 
lanceolate, acute, entire, membranous, glabrous, 9-12 in. long, 
23-8 in. broad at ‘the middle, narrowed suddenly at the base. Main 
veins slender, wavy, 4 in. apart, distinct from the midrib nearly to 
the edge; intermediate veins "form rming copious hexagonal areole 
with free included veinlets. Sori round, superficial, ‘forming two 
irregular rows between each main vein. fa allied to the Indian 
P. membranaceum D. Don 
Antrophyum reticulatum Kaulf. Widely spread i in Tropical Asia 
and Polynesia. to Africa. 
Acrostichum spathulatum Bory. 
43.* Acrostichum (Et ) trichol sp. Root- 
stock short-creeping ; basal palez lanceolate, “A Geeuubekdioan. 
Stipe of sterile frond 2-8 in. long, densely crinite. Sterile frond 
en i g, 1. i 
-sub’ 
rather ascending, lax, forked. Fertile frond small, oblong, densely 
ciliated on the margin with oes subulate palese.—Midway between 
A. scolopendrifolium and A. v 
A, virens Wall. 
Lygodium Kerstentt Kuhn. 
Selaginella concinna Spring. 
The following species were cone by Mr. Last about the 
sources of the Sambiran River, vi 
Davallia mauritiana Hook. 
Lindsaya plicata Baker. 
L, heterophylla Willd. 
Pteris phanerophlebia Baker. 
P. triplicata Ag. 
re biaurita 
DS acumina in. b: 
the sterile frond crenate towards the te. Veins forming copious 
