Pare XLIX. А 
THE TUNBRIDGE FILM FERN 
(Нумехортилам TUNBRIDGENSE). 
HYMENOPHYLLUM, Smith, 
Clusters of Spore-cases enclosed within extremar 
ginal two-valvel &ub-urecolate 
involueres, of the 
Bpore-cases obliquely compressed, 
with a transverse around the columnar receptacles, bursting verti 
cally, Receptacles (extea-marginal extensions of the veins) free, and included 
within the involueres, sub-clavate. Veins disunited at their extremities, simple 
Н. roxsnmncense: fronds p membranaccons, ovate or oblong more or less elon- 
gated, pinnate ; pinnze subvertical, pinnatifid, decurrent, forming a wing to the 
segments linear, undivided or bifid, and, as well as the upper margin 
of the roundish valves of the axillary solitary 
spinulosely serrate 
‘ome rigid, filiform, dark-brown, creeping, branched, and formi 
x dense entangled earpet-like 
les. Fibres 
masses; furnished about the base of the fronds with a few hair-like 
from one-third to one-half the length of the frond, often 
Stipes slender, wiry, terete, varying fi 1 1 f th à 
slightly margined or winged in the upper part ; lateral at intervals 
adherent, 4t 
