MYTILOPSIS. 
Oo 
io 2) 
io 2) 
cellule preminute subrotunde, intus 6-sinuate, carinam versus 
oblongo-hexagonz, omnes convexul, minute tuberculosze, pariete 
incrassato, trigonis magnis. Folia caulina apice valde fissilia, raro 
revera subbifida. F. flagellorum minuta cochleata bifida. 
Foliola caulina omnino nulla. 
Flores dioici postici: 9 e caudice, rarius e caule orti, interdum fasci- 
culato-2-3-ni. Bractez tristiche, bi-trijugee, 3 interiores foliis 
sublongiores, tenuissimz, ovate, obtuse complicato-concavee, ad $ 
bifida, segmentis tenui-acuminulatis, superne subciliate, reti laxiore 
elongato rectangulo et rhomboideo-hexagono vacuo; intima (brac- 
teola) paulo longior, ad } fissa, inciso-ciliata. Bracteze exteriores 
multo minores, late oblique ovate concave, apice integre bifidulzeve. 
Perianthia bracteas plus duplo excedentia, tenuia, anguste pyramidato- 
fusiformia,*inferne obtuse 3-vel seepius 4-gona, apicem versus 6-8- 
plicata, ore conniventi-clauso ciliis longis flexuosis fimbriata, textura 
bractearum. Calyptra paulo brevior ovalis tenuis. Capsula oblongo- 
cylindrica, vix duplo longior quam lata, pallide badia, bistrata ; 
cellule ad parietes laterales trabeculis paucis fulcite, strati interioris _ 
fibra semiannulari carentes. Elateres longiuscul, laxe dispiri, 
subacuti. Spore globose, elaterum diametro, tuberculose. 
Andrecia amenta tenuia postica arcuata sistentia; bractesze pauce 
orbiculate concave, apice bidentes, monandre. 
Obs. The branches spring from the middle of the under face of the 
stem. The leaves veil the stem with their cordate base both at front and 
at back, and their bases imbricate those of the opposite side of the stem ; 
so that the branches also are veiled at their insertion by the leaf-bases on 
both sides, but are not axillary to them as the pinnate branches of 
Micropterygium are. The @ branches, usually shortened down to the 
flower alone, are sometimes elongate and flagelliform, radicellose except 
at the flowering apex. 
XVI. CEPHALOZIA, Dum. emend. 
Recueil d’Obs. sur les Jung. (1835). Trigonanthus Spruce, 
Ann. and Mag. Nat. Hist. (1849). Jungermanie sp. Syn. Hep.* 
Plante e prothaliio lineari filiformive, interdum ramoso, orte, pro 
more pusillze minuteve, raro majuscule, foliose—in unica specie 
frondosee—radicellosze, subramosz, ramis omnibus hypogenis (e facie 
caulis inferiore ortis), nisi in aliis speciebus subgeneris Cephalozielle 
quibus accedunt rami pauci (rarissime omnes) laterales. Folia 
succuba, in paucis subtransversa, sat lata, plus minus concava, vel 
subcomplicata, in plerisque subsequaliter biloba, in paucis integra, 
margine incurvulo—nullibi reflexo—integerrimo, rarius denticulato, 
Foliola foliis minora, in plerisque speciebus ex parte vel omnino 
nulla, ad florescentias autem semper presentia. lores dioici vel 
monoici (autoici, raro paroici); ¢ monandri, in amentis posticis, 
* Conf. etiam tractatum ‘On Cephalozia. Rich. Spruce, 1882.’ 
