228 D1xon: NEW MossEs FROM MALAY PENINSULA 
HAB. Gunong Tahan, Pahang, July, 1911; Ridley (1019b). 
The stems of this plant are a little taller than in the specimen 
of T. abbreviaium, but there is no reason to suppose that this is a 
specific character. The sole difference lies in the constant pres- 
ence of a distinct hyaline hair-point; otherwise the leaf form and 
structure, nerve, &c., are identical. 
It stands therefore in the same relation precisely to that 
species that T. umbellatum (T. Blumii Nees) does to T. exaspera- 
tum, from which it only differs in the presence of a hair-point 
and in one or two very minor and perhaps doubtful characters. 
(The fringing of the calyptra, which is perhaps the chief dis- 
tinguishing character given by Fleischer, is certainly of no real 
value, for I have more than once found in 7. umbellatum capsules 
with calyptra both fringed and unfringed on the same tuft). 
The two plants being described, therefore, give decided sup- 
port to the opinion that I have elsewhere expressed that T. 
exasperatum may be only a muticous leaved form of T. umbella- 
tum. There is, however, this difference, that while in T. wmbel- 
latum the leaves are acuminate at the apex, and taper gradually 
into the hair-point, in T. Ridleyi they are obtuse and cucullate, 
just as in T. abbreviatum, then passing abruptly into the hyaline 
point. 
FISSIDENTACEAE 
Fissidens subdiscolor Dixon sp. nov. (PLATE 3, FIG. 5) 
§ Aloma. F. discolori Wils. ceylonensi affinis; differt caulibus 
altioribus, circa 1.5 cm. altis, foliis latioribus, magis obtusis, 
costa saepius ad apicem attingente; cellulis minoribus, 10-14 pw 
latis (F. discoloris 15-18 yu), et lamina dorsali sat abrupte desinente, 
haud anguste decurrente. Fructus subsimilis. 
HA emas, Negri Sembilan, 1920, on root in a boggy 
hollow; Burkill (6388). 
This may ultimately have to be united with the South 
Indian and Ceylonese species; but it differs in the larger size, 
the leaves nearly always rounded and obtuse at apex with per- 
current nerve (In F. discolor the apex though often quite obtuse 
is frequently somewhat pointed, and the nerve generally ceases 
just below the apex); the cells also are decidedly smaller, and 
the dorsal lamina is not narrowed at the base as in that species. 
