OF THE GENERA NECKERA AND HYPXUM. 483 
mostly limited to Northern Europe. On the other hand, 
C(By7nperes ve(\mYQ& considerable temperature ; and the 
genus HooJceria containing, according to Dr Hooker and 
myself, thirty species, besides doubtful ones, is, with the 
exception of two species, wholly extra-european. It is also 
worthy of notice, that, in the extensive genus Q^'tliotrichum^ 
of which we have published fifty-nine species, all those not 
found in Europe and North America, possess a peculiarity 
of habit at once recognisable, and for the most part also a 
difference in structure. That singular group, too, of 
mosses, denonnnated Leptostomum by Mr Brown, has hi- 
therto been only found in New Holland, Van Dieman's 
Land, New Zealand, and at Cape Horn. From these few 
facts alone, selected from various others that might have 
been brought forward, we have some reason for conclud- 
ing that, at a future period, the distribution of the mosses 
will be found to be a more interesting subject than we at 
present anticipate; and that, even in those large genera, 
which now appear to scatter species indiscriminately over 
every country of the globe, sectional groups will be found, 
affecting perhaps different temperatures and latitudes from 
the rest, 
Hypnum remotifolium, Grei\ 
H. remotifolium ; caule vage ramoso decumbenti, ramis 
elongatis, laxis ; foliis subpatentibus, remotis, late- 
ovatis, acuminulatis, subconcavis, per totam longitu- 
dinem serratis nervo infra apicem evanescenti ; theca 
cernua, operculo, conico, oblique rostrato. 
Hab. South America, on the ground ; communicated by Professor 
Jameson. 
Plant of a yellow or pale green colour, reddish-brown towards the 
base. Stems 2 — 4< inches in length, decumbent, variously divided, 
H h 2 
