332 Carolus Müller. 
3. Mniopsis rotundifolia n. sp.; Mn. Plumulae habitu 
simillima, sed foliola majora, e basi angustissime breviter decurrente 
orbiculari-ovalia brevissime robuste acuminata, planiuscula integerrima, 
nervo pro foliolo lato diaphano striiformi ante apicem dissoluto cari- 
natulo-exarata, e cellulis pro foliolo magnis amplis hexagonis angu- 
latis grosse reticulata, apicem versus majora apice rosulam minutam 
sistentia. Caetera reliqua. 
Habitatio. New South Wales, Lilyvala, Septembri 1891: 
Th. Whitelegge in Hb. Brotheri. 
Species sui generis memorabilis secunda distinctissima, 
4. Hymenodon helvolus n. sp.; cespites supra pollicares 
pulcherrime sulphurei superne laxi inferne fusco-tomentosi; caulis 
angustissime frondosus, basi infima purpurascente nudiusculus inde 
foliis crescentibus eleganter distichaceo-foliosus simplex; folia caulina 
laxe equitantia sed eleganter imbricata difficillime emollientia, perfecte 
emollita maxime diaphano-sulphurea, e basi angustata in laminam 
distincte ovalem vel ellipticam parvam, capillo tenuissimo flexuoso 
aciculari caudatam in foliis infimis multo brevius piliferam attenuata, 
nervo pallidissimo angusto supra medium abrupto exarata, planissima 
margine tenerrime obsolete crenulata, e cellulis minutis angulate 
rotundatis indistinctis areolata. Caetera reliqua 
Habitatio. Nova Seelandia, insula australis, in litore austra- 
lasico prope Greymouth: Richard Helms 1886 misit. 
E pulcherrimis generis, Hymenodonti pilifero similis, sed 
haecce species multo minor tenerior foliis minoribus anguste oblongis 
nec oralibus nec elliptieis diversa. 
5. Rhizogonium (Eurhizogonium) Gehebii C. Müll. in 
sched. ad Geheeb 1872; cespites semipollicares laxissimi lutescentes; 
caulis frondiformis angustus caudatus flexuosus obtusiusculus, inferne 
nudiusculus vel foliolis minutissimis remotiusculis obtectus; folia 
caulina parva densiuscule equitantia erecta vel madore magis patentia, 
perfecte disticha, e basi angustiore oblonga breviter robustiuscule 
acuminata, apicem versus runcinate serrulata, planiuscula, nervo 
pallido angusto strictiusculo ante mucronem evanido exarata, e cel- 
lulis grossis rotundo-hexagonis reticulata; perichaetium radicale, foliis 
e basi lanceolata longius acuminatis tenuiter denticulatis, e cellulis 
angustis longiusculis areolatis; theca in pedunculo longo tenui flexuoso 
rubente erecta longe anguste cylindrica sub ore constricta; peristomii 
longiusculi dentes externi pallidi dense articulati, interni angusti 
carinati pallidi tenuiter rugulosi, ciliolis tenerrimis interpositis. 
Habitatio. New South Wales, Sydney: Domina Kaysser in 
Hb. Geheeb. 
Rhizogonio gracillimo Brother. ejusdem regionis (Gosford) 
simillimum et proximum, sed haecce species statura multo graciliore, 
ii 
