306 MR. W. MITTEN ON NEW SPECIES OF MUSCI FROM CEYLON. 
marginato, margine inferiore recto subsinuatove, limbo obsoleto, 
apicem versus crenulato, nervo ad marginem inferiorem propinquo, 
apice in mucronem ad caulis apicem spectantem excurrente, cellulis 
parvis rotundis pellucidis, interstitiis crassis obscuris, areolata. 
Hab. Ins. Ceylon, Dr. Thwaites. 
Caulis circiter semiuncialis, latitudine cum foliis lineari. Folia pallide 
viridia absque nitore. 
Ervopium, Brid. 
Euerpodium, Witt. Muse. Austr. Amer. 403. 
E. CEYLONICUM, Thw. et Mitt. 
Monoicum ; caulis ramis irregularibus subpinnatim ramosus, prostratus ; 
folia complanata, superiora (= dorsalia) imbricata, directione divergen- 
tia, oblongo-orbiculata, basi ad insertionem angusta asymmetrica, mar- 
gine superiore arcuato, inferiore rectiusculo, integerrima, obtusissima, 
cellulis parvis rotundis obscuris areolata, inferiora ( — ventralia) multo 
minora, directione patentia, oblonga, obtusa, symmetrica; perichzetium 
foliis imbricatis erectis convolutaceis, apicibus obtusis parum recurvis, 
internis ovalibus margine papillis minutis eroso ; theca in pedunculo 
brevi pallido, ovali-oblonga, operculo conico acumine obliquo; calyptra 
infra medium thecse descendens, basi truncata, uno latere breviter 
fissa, superne tumida subscabra in apieulum brevem producta; flos 
masculus triphyllus, foliis ovatis obtusis. 
Hab. Ceylon, ad corticem, Dr. Thwaites. 
Rami cum foliis vix tertiam quartamve partem linex lati. Folia intense 
viridia. Ramus fructifer eum capsula completa quam linea brevior. 
Pedunculus theca parum brevior, pallidissimus. 
Compared with Æ. domingense, Brid., Schwegr. Supp. t. 267 
(Anectangium), the following differences present themselves :— 
In E. domingense the leaves are compressed and rather densely 
inserted; those on the underside of the branches not obviously 
distinct or different in form from those of the upper, which are of 
an oblong-ovate outline, their apices obtuse, their base being 
slightly asymmetric, from one margin being more rounded than 
the other. In Æ. ceylonicum the upper or dorsal leaves, almost 
orbicular in outline, are distinctly bifarious and so inserted that 
each one slightly overlaps the inferior edge of the one next above 
it, completely covering the leaves inserted on the ventral side, 
which are of considerably less than half the size of the dorsal 
ones, so that the branches viewed with a lens on the dorsal side 
may be very easily overlooked as belonging to some species of 
Lejeunia allied to the common L. serpyllifolia. 
