1906. 
Notes. 
233 
solution, aud if tin's water contains much CO^ in solution it will neces- 
sarily act as a solvent- I find algae similar to those contained in your 
specimens on shady limestone rocks in Yorkshire in the ghylls 
(ravines) with precipitous banks, where there is a constant but small 
trickle of water, which is so highly charged with lime that a tufaceous 
deposit gradually results. The alga which forms much of the matrix 
of your specimens is Dasyglcea ainorpha, Berk., a blue-green alga ; this 
occurs in all the patches. The pulvinate patch has also radiating and 
branched filaments of Stigonema mamillosum, Agh. The soft specimen 
from the bottom appears to be mostly Dasygloea amorpha. There is also 
present, scattered among the other algae, a very slender Phormidium, 
probably P. tenue. The above are all (blue-green [cyanophyceous)] 
Myxophyceae. As mixtures among (or resting on) the above were 
Gloeothece linearis, another blue-green alga ; also Cosmariwn granatum var. 
siibgranatttm, Euastrum pectinatuniy Epithemia Argus, Cocconema lanceolatmn, 
and other diatoms. I have not had time to make a list of all the 
species ; the diatoms would require some days' preparation." 
R. Li,. PraegeR. 
Dublin. 
Parsley Fern in Co. Wicklow. 
In the Irish Naturalist for October, 1905, the occurrence of the 
iParsley Fern {Allosorus crispus) near I,ough Nahanagan, in Co. Wicklow, 
is recorded. Up till that date it was not known south of a line drawn 
from Dundalk to Sligo. On one of the excursions in connection with 
the Summer Course in Botany for Teachers, held last July at the College 
of Science, I obtained several fronds of the Parsley Fern growing in 
crevices between stones at Ballyknockan, near the granite quarries. 
Several tufts were observed, and they were bearing sporangia at the time. 
Probably other stations will be found for it in Co. Wicklow, where it 
seems to be undoubtedly native. 
J. Adams. 
Royal College of Science, Dublin. 
Glyceria aquatica in Co. Donegal. 
Travelling on August 7th on the recently opened branch line between 
Donegal and Ballyshannon, at a place where the line runs on the level 
through old marshy meadow land, I noticed an unfamiliar grass growing 
in drains near the railway. On August 9th we went and gathered a 
quantity. I diagnosed it to be G. aquatica, aud sent a specimen to Mr. S. 
A. Stewart, who confirmed my identification. The grass was growing 
most luxuriantly, and extended into the meadows for some distance. It 
has all the appearance of having been there for generations. I may say 
that the railway was only completed a few months ago, so there could 
be no possibility of introduction in that way. 
M. J. I^KEBODV. 
I<ondonderry. 
