MR. W. MITTEN ON NEW SPECIES OF MUSCI FROM CEYLON. 313 
A. Theca immersa. 
* Peristomium incompletum. 
plicata (Nees). 
Powellii, Mitt. 
aristata, V. d. Bosch et Lac. 
levifolia, sp. nov. 
obtusifolia, sp. nov. 
densifolia, sp. nov. 
tortifolia, sp. nov. 
** Peristomium duplex, completum. 
setigera (Sull.). 
cuspidata, Mitt. 
B. Theea exserta. 
elegans, Dozy et Molk. 
moluccensis, V. d. Bosch et Lac. 
samoana, Mitt. 
angustifolia, Mitt. 
compressa, sp. nov. 
carinata, sp. nov. 
Some other species have been described by C. Müller as having 
been found in Ceylon by Nietner; but, from the descriptions, they 
must be different in habit, for they are stated to have creeping 
stems, a character observable in none of the species above tabu- 
lated, in all which the habit appears to be as in Orthotrichum. 
G. OBTUSIFOLIA, Thw. et Mitt. 
Caulis basi divisus; foliadense inserta, imbricata, patentia, latissime ovalia 
obtusissima, cum mucrone minuto inflexo reflexove, sub apice excavata, 
circiter quadriplicata, plicis dorso leevibus, breviter binervia, margine 
integerrimo minutissimeve serrulato, cellulis densiusculis areolata; pe- 
richeetialia erecta, latissime ovalia, cuspide brevi patente ; theca emer- 
gens, ovato-oblonga, sieca sub ore contracta; peristomium depressum, 
dentibus carnosis rubris cohxrentibus siccitate mvolutis, internum 
zquilongum processibus subcarnosis angustis flavis liberis. 
Hab. Ins. Ceylon, Dr. Thwaites. 
G. densifolie simillima, foliis autem sub apice profundius concavis, api- 
culo inconspicuo et perichztio peristomioque diversa. 
G. LAEVIFOLIA, Thw. et Mitt. 
Dense cespitosa; caulis subsimplex ; folia dense inserta, tereti- et tumidi- 
imbricata, oblongo-ovalia, apice excavata, cochleariformi-concava, 
lzvia, apiculo subplano brevi recurvo, margine apicem versus serrulato, 
enervia, cellulis oblique seriatis areolata ; theca oblonga, in perichzetium 
