Musci Exorici.—Forsteriani. 
MONOCLEA FORSTERI. 
Gen. Cuar. Receptaculum fructus commune nullum. 
Capsula pedunculo calyce longiori insidens, univalvis, 
hine longitudinaliter dehiscens. Colwmella nulla. 
Monoclea Forsteri. (Tas. CLXXIV.) 
Anthoceros univalvis. Forster's MSS. 
Has. Insule australes. .D.G. Forster (in Herb, Lambert.). 
Frondes bentes,imbricatz,subcongestz,coriaceo-foliacez, 
crassiuscule, succulentz, plane, suborbiculares, inzequaliter 
lobate, lobis late ovatis, obtusissimis, margine undulatis, si- 
nuatis, crispis, enerves, atro-virides, superne glabra, vix reti- 
t 
frondium. Calyx nullus. Corolla intra frondem inclusa, tu- 
bulosa, apice bifida. Sete sesquiunciales, carnoso-succulente, 
sordide flavze, solitarize, vel tres ex eadem cavitate. Capsula 
oblongo-cylindracea, fusca, striata, inclinata, dorso longitudi- 
naliter dehiscens, demum post seminum emissionem in valvam 
oblongam coriaceam expansa, Semina et fila spiralia nume- 
rosa (ut in Jungermannia). 
I know of no specimens of this highly curious plant, but those 
which exist in Mr. Lambert’s herbarium, where they bear the 
MS. name of Anthoceros univalvis. There are no details, how- 
ever, in that drawing; and I should have been ignorant of the 
true structure of the capsule, had it not been for some young 
fructification upon the specimens here figured. There were three 
capsules nearly risen above the surface of the frond, and it was 
ere easy to see that the capsule is at first cylindrical, of one valve, 
and bursting at the underside by a longitudinal opening, whence 
the seeds and spiral filaments make their escape. After this, the 
valve is spread out, and becomes of an obovate figure. The three 
capsules which have scarcely risen above the surface of the frond, 
though burst, have probably done so from the effect of pressure 
and drying, 
I have derived the name of this genus from jpoves one, and 
xsi to shut up, from the circumstance of the single valve of 
the capsule, in contradistinction to the four valves of Junger- 
mannid, and the two of Targionia and Anthoceros, from which 
ast genus it also differs in the want of a columella to which the 
