Dixon: NEw Mossgés FROM MALAY PENINSULA 237 
lucidae, prosenchymaticae, laeves, parietibus tenuibus, infra 
medium folium vix mutatae, ad angulis plures magnae, vesi- 
culosae, hyalinae, alas optime notatas triangulares instruentes. 
Cetera nulla. 
A Nullonng, 7000 ft., Burma; Kurz (2863). 
This plant was sent to me from Mitten’s Herbarium at The 
N. Y. Botanical Garden, as Hypnum prionotrichum Hamre ined. 
It seems to belong clearly to Clastobryum, but is very distinct 
from the published species in the oval leaves rather abruptly 
narrowed to a fine, flexuose, toothed subula, and in the large, 
vesicular, thin-walled alar cells, ascending in 2—3 series of smaller 
ones at margin. The microphyllous flagella are also note- 
worthy; a somewhat allied species from Assam (C. surculare 
Dixon ined.) has similar branchlets, but more shortly pointed 
leaves and small alar cells. 
HOOKERIACEAE 
Chaetomitrium setosum Broth. in sched. (PLATE 3, FIG. 13) 
Sat robustum, habitu C. philippinensi subsimile; dense 
ramosum ramulosumque; folia sat distincte seriata, stricta, 1.5-2 
mm. longa, oblongo-ovata, cochlearia, infra acumen breve 
acutum reflexum constricta; costis binis brevibus bene notatis, 
marginibus inflexis, e medio folio sensim argutius denticulatis, 
parte superiore saepe spinulose dentaus; cellulae perangustae, 
dorso alte argute papillosae. 
Perichaetii bracteae foliis subsimiles, angustiores, minus 
concavae, longius acuminatae, fortius spinulose dentatae; seta 
circa 5 mm. alt. per totam longitudinem fere dense praealte 
setosa. Calyptra basi longe laciniata, ciliis flexuosis, e cellulis 
pluriseriatis compositis. Theca horizontalis. 
. Tapah, Perak, 1908; Ridley (169). 
A quite distinct species, with somewhat the habit of C. 
philippinense and C. elongatum, but with a highly setose, short 
fruit-stalk. The deeply concave leaves, with the upper part 
of the inflexed margin often very sharply toothed, also give 
marked distinguishing characters. 
Chaetomitrium perakense Broth. in sched. (PLATE 3, Fic. 12) 
C. orthorrhyncho proximum, nec differt nisi caracteribus 
fructiferis; perichaetii bracteae haud ciliatae, sed fortiter runcina- 
