Musci1 Exorictr. 
LEUCODON RUGOSUS. 
Leucodon caule repente, ramis erectis subsimplicibus, 
foliis ovato-lanceolatis transversim rugosis, nervo at- 
tingente, perichetialibus setam omnino vaginantibus 
attenuatis nervosis, capsula cylindracea erectiuscula 
striata, ore horizontali, operculo subulato. (Tas. XX.) 
Has. In Nova Hollandia. Turn. Herb. a Dicksonio missus. 
Caulis repens, valde ramosus, ramis erectis, simplicibus vel inno- 
vationibus rarius divisis, teretibus, incrassatis, apice obtusis. 
Folia densissime imbricata, erecto-patentia, ovato-lanceolata, 
concava, fusco-lutescentia, nitida, transversim rugosa, mar- 
gine integerrima, superne inyoluta, nervo distincto ad apicem 
attingente instructa. Perichetialia magna, flavescentia basi 
aurantiaca, nervo distinctissimo, a basi ad apicem usque attin- 
Sente, instructa: ext, minora, late ovata, anguste attenuata ; 
int. longissima, setam superantia atque vaginantia, apice atte- 
nuata, Set@ laterales, non raro bine ex eodem perichetio, 
Capsula rufo-fusca, cylindracea, erecta, vel leniter inclinata, 
stricta, estrumosa, ore transverso, Operculum subulatum, 
ereslomi dentes 16, flavo-rufescentes, graciles, transversim 
Striati, profunde bifidi, segmentis linea media longitudinali 
Rotatis iterumque apice divisis, 
ma; in the hori- 
wants the gibbosity 
t a nerve as those of the stem, 
Fig. ize. Fig, 
Se ] Os nat. size. Fig. 2, leaf, Fig. 3, perichetium 
Fig. 4, exterior perichztial leaf, 
Fig. 5, inner 
teeth of peristome,—magn, 
ditto, Fig, 6, 
