SOME ADDITIONAL JAMAICA FERNS. 267 
few deciduous hearenred, bullate brown scales beneath, surfaces 
abro 
and very small involucres. In aspect it exactly corresponds with 
Cyathea dissoluta Baker 
Dicksonia antillen , n. sp. — Rootstock not seen. Pees 
erect, 2-23 ft. long, ria brown, channelled, naked. onds 
erect, 3-4) ft. long, 24-8 ft. wide, truncate at the "base, ae aiae 
acuminate, finely decompound. Pi in numerous pairs,  agplaacats 
at right angles. sessile, oblong-lanceolate, the lowest pair y 
somewhat smaller than the next pigens ae Fa id 4: apart, 
quadri-pinnate, 1— ine t. long, 6-8 in 
divisions the same shape, but proportionately sine  atrnary 
deeply cut into inten segments }-1 1]. wide, whic rren 
w. and the allied species, for which reason I piece it here. From 
. species it is readily distinguished by its fine cutting and the 
flat_ terminal involuecres, every final segment of the fertile fronds 
bearing one. It is as finely cut as Davallia fumarioides Sw. or 
Cjemen ‘amma schizophylla Baker 
Lindsaya faleata Willd. 
Adiantum nigrescens Fée — Distinguished from the striatum 
group, with which its alliance i is, by aie ebeneous polished smooth 
petioles, ee and s stipita e segmen 
Cc the esii, n. i. —Stip: ite es tufted, slender, polished, 
ook Sariasag brown or bla ckish, x Bane led on She upper half, 
long, with a few minute deciduous s at the base. 
li multifid, lanceolate or ovate-lanceolate, sa in the 
lower half, 4-8 in. long, _ petsaen Ti wide, tripinnate. Pinne regular 
from the base of ‘the frond upwards, contiguous, numerous, spreading 
alternately, lanceolate, basal ones the largest or not, 13-3 in . long, 
t-1in | 
and fully pinnate, with 2-6 rather spathulate — segments on 
each side, about 14 1. long, 3-11. wide, the term and 
ame at the base, all famtly crenate or anulae on the outer 
Tex jure membrano-chartaceous ; colour dull clo 
een; surface Rachis and costw polished and coloured 
fike the stipites, " uasniiied and scariose-edged. Veins pinnate, 
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