HEPATIC/E ANTARCTICA. 459 
imbricated ; their bases are remarkably small, the denticu- 
lation of the inferior margin considerable. 
This is exceedingly near in characters to our Jung. unci- 
formis, but isa taller plant, the leaves less imbricated and 
less secund. When moistened, their bases are much narrower 
and the stems are far paler. 
10. J. uncialis, n. sp. ; caule ceespitoso erecto ramoso, foliis 
subimbricatis erecto-patentibus concavis late ovalibus, 
margine inferiori subrecurvo dentato, superiori integerrimo, 
calyce terminali late obovato subtruncato, ore dentato 
ciliato. 
Has. Cape Horn. 
Tufts wide, pale yellowish-green. Stems scarcely one 
inch high, the fruit-bearing shoots subfastigiate. Leaves by 
no means decurrent, the pericheetial half as long as the calyx. 
This is roundly truncate, compressed above before flowering, 
and has a more extended slit on one side. Capsule oblongo- 
Spherical, scarcely exserted. Perigonia are short spik 
Occurring in the course of the shoots. E 
In habit the present approaches the African Plagiochila 
sarmentosa of Lindenberg, but in character is nearer to our 
J. aculeata. The former has larger and more rotund leaves ; 
its fructification is unknown, the latter is a much larger 
plant, its leaves have a narrower base and their superior 
Margin recurved with a larger fold, their denticulation is 
coarser, their calyx shorter, scarcely exceeding the top of the 
perichetial leaves and above all, although our plant is far 
smaller, the cellules of the leaves are considerably larger. 
ll. J. minutula, n. sp.; caule brevissimo cespitoso erecto 
ramoso, foliis arcte imbricatis erectis compressis rotundatis 
concaviusculis, margine anteriore decurrente, supremis 
majoribus denticulatis. 
Haz. Kerguelen's Island. 
Tufts wide, blackish green. Stems erect, rather thick; 
Shoots scarcely one tenth of an inch high, having from four 
to six pairs of leaves. Lower leaves minute, scarcely wider 
than the stem, the upper crowded and compressed into a 
