HEPATICZ ANTARCTICA, 477 
elongato subsimplici, foliis subimbricatis erectiusculis inte- 
gerrimis, lobo superiori oblongo-rotundato, inferiori minuto 
ovato involuto, stipulis majoribus ovatis acutis, summo apice 
fissis. 
Has. Falkland Islands. 
Patches several inches wide, pale olive-green. Stems 
nearly one inch long, usually simple, much elongated. 
Leaves amplexicaul, nearly erect, concave. Stipules large in 
proportion to the leaves, their fissures at their tops only 
visible when pressed in water and viewed with a lens. 
We are not acquainted with any other species with sti- 
pules so large, relatively to the size of the plant; nor one 
in which the fissure at their summits is so inconsiderable. 
56. J. parasitica, n. sp.; caule subimplexo procumbente ra- 
moso, foliis subapproximatis patentibus concavis integer- 
rimis, lobo superiori triangulari-ovato acuto, acuminibus 
antice curvatis, inferiori oblongo involuto, stipulis mi- 
nutis bilobis lobis rotundatis integerrimis. | 
Has. On J. uncialis (nob.), Cape Horn. Par 
Stems dispersed over the surface of other vigili, 
not distinctly visible to the naked eye, scarcely one-tenth of 
an inch long, irregularly branched. Leaves rather distinct, 
patent, their bases wide, their acute summits pointing for- 
wards, the lower lobe slightly waved at its involute margin. 
Stipules scarcely wider than the stems, very pale green, their 
segments rounded and entire. 
It is interesting to observe how closely the present re- 
sembles the Irish J. ovata, n. sp., a parasite, equally minute 
and with stipules exactly similar. It differs, principally, by 
its shorter leaves with wider bases and more acute tops, 
more distantly placed ; besides, the colour of the plant is 
paler, the cells of the leaves more minute, and consequently 
their structure more dense. 
(Noteroclada, Tayl.) 
Char. Gen. Involucrum ex frondis terminatione concava, 
tumida conflatum, apice libero bilobum. Capsula quadri- 
