ALGA ANTARCTICA. 255 
Has. Cape Horn. 
Frond 8-12 inches long or more, rising from a minute 
disc, with a cartilaginous filiform stem that becomes winged 
at about a quarter inch above the base, and thence is gradually 
lost upwards in the long narrow cuneate base of the frond, 
the traces of the stem gradually becoming fainter as the lami- 
na widens, but not breaking up, as in some other species, into 
numerous veins. The normal form of the frond seems to be 
broadly lanceolate, gradually tapering to an acute point, and 
with an entire but wavy margin ; sometimes however it is cleft 
from the apex downwards into a number of linear-lanceolate 
tibbon-like segments, which though they acquire proper 
Margins, appear to originate in splittingor injury, more than 
from a natural division of the frond. This species is un- 
doubtedly closely allied to N. punctatum, from which it is 
chiefly distinguishable by the long cuneate base of the 
frond passing into a filiform stem, and by the absence of di- 
chotomous division, with wide axils. 
17: Nitophyllum multinerve, nobis ; fronde stipitata elliptica 
V. ovata subintegerrima v. lobata tenerrima roséa nervosa, 
nervis pluribus distingtis parce dichotomis subparallelis 
apicem versus frondis evanescentibus, soris. . . .? 
Han. Cape Horn and the Falkland Islands. 
Stem from i inch, as in most of our specimens, to nearly 
an inch long, simple, breaking up at the commencement of 
the frond, into numerous rib-like dichotomous veins, which 
are continued through the major part of the frond and vanish 
towards its apex. Frond delicately membranous, rose-co- 
loured, ovate or elliptical, but probably much modified as 
the plant advances. Our specimens are all young, and per- 
PS we are injudicious in founding a species upon them. 
eir nervation is, however, very remarkable, and much 
Tesembles that of our Delesseria dichotoma, but the nerves 
are much fainter, less distinct from the lamina, and they 
vanish at a greater distance from the apex, nor is there any 
Indication in the present plant of a disposition to form dis- 
leaves, oe our 
