HEPATICA ANTARCTICA. 395 
mannia clavigera, Hook., the segments of the stipules are 
frequently replaced by auricles. The present is, perhaps, 
the minutest species of this subdivision of the genus, hitherto 
known. 
60. J. reticulata, n. sp.; caule implexo prostrato subpin- 
natim ramoso, ramis brevibus, foliis distichis imbricatis 
patentibus concavis, rotundato-oblongis apice recurvis, 
margine inferiori subdentatis, auriculis subbifidis, segmente 
exteriori clavato, interiori subulato ; stipulis quadripartitis. 
Has. Lord Auckland's group. 
Patches several inches wide, flat, entangled, the older parts 
blackish, the new either pale, almost whitisb, or of a fine 
vinous red or purple. Stems about two inches long, often 
elongated, the branches very short. Leaves remarkably 
pellucid and having large reticulations or cells; entire, except 
that the cauline have a tooth or two on their inferior margin; 
on the main stem, the clavate auricle is accompanied by a 
subulate leaf-like process, between it and the stem. Stipules 
rather concave, deeply divided, their segments much acumi- 
nated; on the younger branches the segments of the sti- 
Pules are often but two; but the segments, whether two, 
three, or four, are sometimes changed into clavate forms. 
Between this, one of the most beautiful objects under the 
microscope, and Jungermannia clavigera, Hook., it is difficult 
to define the differences. The larger cells of the leaves of the 
present, the larger and darker tufts, the shorter branches fre- 
quently concealed by the leaves, the tumid summits of the 
stems, the denticulation limited to the inferior margin ofthe 
» and the margins of the segments of the stipules not re- 
curved, are very principal and decisive marks. 
61. J. aterrima. n. sp.; caule implexo procumbente vage- 
ramoso folis imbricatis patentibus concavis integerrimis 
Totundato-oblongis, apice recurvis, auriculis late oblongis 
inflatis, stipulis minutis ovatis bipartitis, segmentis lanceo- 
latis exterius basi unidentatis, perigoniis rotundatis, foliis 
pericheetialibus integerrimis incurvis. 
Has. Lord Auckland's group. 
: 262 
