50 
NEW ARRANGEMENT OF 
in this country are, G. Grifflthiannm, trichodes, conicum, 
and Donianum. The first has been gathered on Ingle- 
borough, Snowdon, and the mountains of Angusshire; 
the second in Sussex, and near Dubhn ; the two last are 
abundant in the very few stations in which they are found. 
G. conicum is, according to Mr Mack ay, too frequent in the 
Dublin Botanic Garden ; and G. Donianum we have re- 
cently had the pleasure of rediscovering, in the utmost 
profusion, in Mr Don's old and only station, the Den of 
Dupplin, Perthshire. Very few Gymnostoma are to be met 
with on elevated mountains, though many occur in subalpine 
districts. 
Htst. The Mosses composing the present genus, formed 
with DiLLENius and Linn^us a part of Bryum. At that 
period no attention was paid to the peristome ; but as soon 
as Hedwig commenced his work of reformation, the genus 
Gymnostomum was established : and at the same time was 
described another genus nearly allied to it, by the name of 
Hedwigia, the same as Anictangmm of the Species Musco- 
rum. In that work fifteen Gymnostoma are published, and 
seven Aniciangia, from which must be deducted, as being 
varieties, or belonging to other genera, the following ; from 
Gymnostomum five (of which one is Schistostega), and 
from Anlctangium six species (of which one is a Gymno- 
stomum, and another an Hedwigia). In the first Supple- 
ment published by Schw.egeichen, twenty-four species of 
the one, and ten of the other, are enumerated. Bridel 
in his last work gives us no fewer than four genera formed 
out of the above, Gymnostomum, Pyramidida, ScMstidmm, 
and Anictangium ; of which, the first contains thirty spe- 
cies, the second one, the third six, and the last two : Pyra- 
midida, however, is a true Gymnostomum, and ranks next 
to G. pyriforme, and of his two species of Anictangium^ the 
