460 HEPATICA ANTARCTIC, 
head three or four times wider than the inferior part of the 
shoot; the lower leaves are nearly entire, the upper crenu- 
lato-dentate with very minute teeth; the structure of the 
leaves is thick and dense, the cells of the margin conspicuous, 
of the rest indistinct. 
This is more minute than the Plagiochila pusilla (Mont.), 
has not its curved stems, the number of leaves is much fewer 
on each shoot, andit is decidedly distinguished by the an- 
terior margin of the leaves being decurrent. 
12. J. heterodonta, n. sp.; caule cespitoso erecto ramoso, — 
ramis erectis subfasciculatis, foliis erecto-patentibus im- 
bricatis obovatis, margine superiori decurrente, inferiori 
apice emarginato-bidentato, ceterum incqualiter denticu- 
lato, calyce terminali foliis perichetialibus minore ovali- 
rotundato dentato-ciliato. 
Has. Kerguelen's Island. 
Tufts wide, dusky olive-green. Stems nearly two inches 
high, irregularly branched. Leaves rather closely imbricated, 
obovate-rotundate or very wide at the tops, their denticula- 
tions unequal ; in some leaves the emargination into two lobes | 
is sufficiently evident and in all there is some trace of its : 
Calyx shorter than the perichztium, with a rounded, bila- —— 
biate, minutely ciliated top. T 
From Plagiochila sciophila (Lind.), of Nepal, which, like- 
wise, has emarginato-dentate leaves, the present may be a 
known by its smaller size, its erect growth, its leaves dady — 
imbricated and their margins supplied with more teeth; — 
besides perigonia are observed in the antarctic species, md 
are short, terminal, narrow spikes, with minute, erect, "Ht — 
bricated bidentate leaves, whose tops are somewhat squat- — 
rose. UE 
(Jungermannia, L. e£ Auct.) 
13. J. colorata, Lehm. in Linnea IV. p. 366. ae 
Has. Falkland Islands, Cape Horn and Kerguelen’s Island. 
14. J. byssacea, Roth., Cat. Bot. II. p. 158. 
Has. Falkland Islands. 
