ER 
FERNS COLLECTED IA {Costa RICA BY MR. P, G. HARRISON. 363 
lowest diplazioid. Indusi ium narrow, glabrous, persistent. Allied 
to the Indian 4. porrectum Wall, and A, —— Hook. 
Aspidium aculeatun Sw., var. phegopteroideum Baker. — A. 
trifoliatum Ws 
ee conterminum Desvy.—N. patulum Baker.—wN. effusum 
158*Nephrodium ger ee stenophyllum B = 
n. — —Rootstock not seen. Stipe s lender, naked, greenish, 5-6 in 
ong. Lamina lanceolate, simply pinnatifid, moderately firm in 
texture, bright green on both surfaces, hairy on the main veins 
below, 6-8 in. lo ong, 4-3 in. broad, tapering pet A from the 
middle to both base and apex, the semicircular marginal lobes } in. 
broad, reaching a third of the way down to the rachis. Veins 6-7. 
jugate opposite the lobes in the centre of the frond, arcuate, — 
the groups joining towards the margin. Sori small, r ound, one 
each a medial on the veins. Involucre minute, hispid, oe 
Allied to the Guatemalan N. Skinneri and the West Indian 
N, Saecm. 
221*Nephrodium (Saget) athyrioides Baker, n. 
Stipe slender, fragile, castaneous, naked, 4-6 in. long. Plentins 
deltoid, moderat tely firm in texture, bright green ‘and glabrous on 
th surfaces, 9-12 in. long and broad, with a deeply pinnatifid 
apex with large lanceolate cae aiyd lobes, a nd on each side of the 
Castaneous rachis 1-8 petioled free pinne, the lowest deeply 
ay ot een fe on the lower side, with several large reer 
men Veins astomosing copiously in small irregular 
sisi tk copious free included veinlets. Sori mainly in Bedi 
Nephrolepis cordifolia Presl. 
80*Polypodium (Gonropreris) heterophlebium Baker. n. sp. 
=\Rivotetock and stipe not seen. Lamina oblong-lanceolate, simply 
pinnate, membranous, bright green on bots surfaces, pubescent on 
the main ribs beneath, 15-18 long, 8-9 in. broad, Pinne 8-9 pairs 
below the pinnatifid apex, all sessile, distant, all except the lowest 
furnish = with a large decurrent base with a rounded auriele at the 
top ; ral lower pinne 5-6 in. long, 1-11 in. broad, acuminate, 
distinetly « crenate. Main veins erecto-patent, ren si 4 in. 
art . 
Nearest P. reas but very different by its decurrent pinne 
and the irregularity of their apical anastomos 
‘S7*Polypodiua. (DrcrvopreRis) phececiite Baker, n. sp. — 
Stipe naked, castaneous, fragile, 4 ft. long. Lamina deltoid, 
moderately firm in texture, here and g glabrou us on both s priori. 
. large lanceolate segments, abe single pair of free shortly- ‘petioled 
inne with short lobes on the upper and larger ones on the | 
