12. Jungermajjnia hemicardia, Hook. fil. et Tayl.; caule ascendente subtriangulari simplici v. ramoso, foliis dense arcteque imbricatis erecto-patentibus oblique et late ovatis basi cordatis apicibus rotundatis marginibus integris v. superne denticulatis subconcavis, margine anteriore recurvo posteriore basi in lobulum producto. (Tab. LXIII. Kg. II.) .
Hab. Campbell's Island ; on exposed rocks, near the summits of the hills.
Caspites fusco-olivacei, 1-2 unc. lati. Catties una cum foliis triangulares, f— 1 unc. longi, e rhizomate repente ascendentes, simpliciusculi, rigidi, antice plani, profunde caualicidati. Folia arete imbricata, integra v. denticulata, opaca, dense cellulosa, areolis minimis hexagonis.
The leaves of this species meet back to back and are so closely imbricated that the stems appear triangular, their anterior margins not touching but leaving a space which appears like a groove running down the whole length of the stems, then- recurved margins are rather tumid and decussate on the opposite face. In general habit this resembles the J. punctata, Tayl., a species recently detected both in Ireland and the Canary Islands, froin which the gibbous or oblique leaves will readily distinguish it.
Plate LXIII. Fig. II. — 1, a specimen of the natural size; 2, astern; 3, portion of a branch; 4 and 5, leaves; magnified.
13. Jungermannia circinnalis, Lehm. Pugitt. Plant. IF. p. 64. Lehm. et Lind. Spec. Hep. p. 1 24. t. 27. Gottsche, Lind. et Nees, Sj/nops. Hep. p. 53.
Hab. Lord Auckland's group ; on rocks and on the lulls, rare. This agrees with authentic specimens of Lehmann's plant, except hi the summits of the stems not being so remarkably eircinnate as they are described. Such circinnate summits, however, are truly perigonia, whose leaves are smaller, more ventricose and erect than those of the stem; and further, some of them contain in their axilla? a single, rather large, peclicellated anther. Our specimens are about half an inch long, stout and curved ; the leaves much more lax than in the former species.
14. Jungermannia cogmta, Hook. fil. et Tayl.; parvula, fulva, caule erecto csespitoso subsimplici v. rainoso, foliis laxe imbricatis patulis late ovatis v. elliptico-oblongis acuminatis paucidentatis basi attenuatis decurrentibus, margine anteriore vix recurvo, calyce terminali perichaetio aequilongo vix curvato bilabiato labiis ciliato-dentatis. (Tab. LXIII. Fig. III.)
Hab. Lord Auckland's group; on alpine rocks, growing amongst stunted tufts of Hymenophyllum multifidum.
Caspites diametro 1-2 unciales, inferne brunnei, superne flavi v. flavo-fusci. Caules erecti, 1 unc. longi, subrigidi, inferne nudi, parce ramosi, anni prsecedentis ssepius innovati, apicibus subcurvatis. Folia distieha, subpatentia v. divaricata, coriacea, apices versus 3-5 dentata, dente apicali majusculo acuminato, margine anteriore subrecurvo decurrente ; foba pericha;tii erecta, elongata, magis dentata.
This has much affinity to the /. decipiem, Hook., a very variable species in the form of the leaves, but in which their cellules are much larger and more lax, while in this they are so dense as to be hardly distinguishable. The European plant differs further from the present in a character alluded to by the authors of the 'Synopsis Hepaticarum,' who remark, "J. decipiens ab omnibus congeneribus margine dorsab folii iimexo nee reflexo differt."
Plate LXIII. Fig. III. — 1, a specimen of the natural size; 2, the same, magnified; 3 and 4, portions of stems and leaves; 5, perichsetium and calyx ; magnified.
15. Jungermannia ple?irota, Hook. fil. et Tayl.; casspitosa, caule erecto diviso v. parce ramoso, foliis
