FROM JAPAN AND CHINA. ` 155 
Habit, colour, and appearance altogether that of Z. polycarpa, 
Ehrh.; but the areolation of the leaves is more dense, the cells 
being about half the size of those in that species, and the capsule, 
so far as can be seen from the unripe fruit on the specimens, is 
arcuate. 
NECKERACEA, Mitten. 
OMALIA, Brid. 
O. NITIDULA, sp. nov. Caule humili, foliis compressis patentibus ob- 
ovatis apice obtusis crenulatis angulo parvo terminatis, nervo tenui 
concolori medio evanido, cellulis apice ad marginemque lateris supe- 
rioris ovoideis, reliquis e folii medio ad basin usque laterisque inferioris 
elongatis, omnibus pellucidis. 
Hab. Nagasaki, Japan, Oldham. 
Similar in size to O. trichomanoides (Schreb.), but with wider 
obovate leaves. 
THAMNIUM, Schimp. 
T. suBsERIATUM (Neckera), Dzy. et Molk. 
Hab. Nagasaki, Japan, Oldham. Moist places among rocks, Buffalo 
Bay, China, Alexander. 
RHACOPILACEÆ, Mitten. 
RHacoPILUM, Brid. 
R. ARISTATUM, sp. nov. Caule repenti pinnatim ramoso radiculoso, 
foliis rigidulis statu sicco directione immutatis, lateralibus divergen- 
tibus ovali-oblongis acutis, nervo concolori in pilum viridem levem 
excurrente, marginibus superne serrulatis, cellulis ovoideo-rotun- 
datis, superioribus subhexagonis, foliis superioribus dimidio minoribus 
ovato-subulatis. 
Hab. Yokahama, Oldham. 
Intermediate in size between R. spectabile, Hsch., and R. tomen- 
tosum, Sw., with the foliage when dry retaining the same direction 
as when wet, but having the margins of the leaves involute. 
HYPOPTERYGIACEE. 
HYPOPTERIGIUM, Brid. 
H. Japoxnicum, sp. nov. Synoicum, stipite brevi, foliis deltoideo-ovatis, 
superne in frondem parvam subdeltoideam ramosam, foliis parum asym- 
metricis ovatis, acumine brevi terminatis, limbo tenui pallido apicem 
versus denticulato cireumductis, nervo infra apicem evanido, cellulis 
parvis ovoideo-rotundis, apice rotundis limitibus mollibus, foliis stipu- 
liformibus suborbiculatis, acumine brevi subulato, nervo percurrente, 
