Mosses from Pre-Carboniferous Rocks. 69 
but where the name differs in the Flora of West Yorkshire or 
in Braithwaites Moss Flora, these synonyms have been added ; 
this apparently being the only way to deal with a difficulty 
which is very real and discouraging to beginners. * 
Where the moss is new to either Ribble or Lune drainage, 
it is shown by the letters L or R in parenthesis. 
(R.) Andreea petrophila. 
(R.) »,  Rothir. 
(R.) | »  Rothw var. falcata. 
(R.) »  crassinervia. 
These mosses are found in quantity in Crummockdale 
and under Moughton, opposite Horton in Ribblesdale. They 
cover many square yards of surface, making the rocks quite 
black in appearance. The altitude, 700-800 feet, is very low for 
these species in our latitude, and is due to the influence of the 
surrounding mountains. 
(R.)  Diphyscium foliosum (Webera sessilis). 
(R.)  Diphyscium foliosum var. acutifolium. 
(R.) Fissidens osmundotdes. 
We have before shown these to be on Ingleborough ; this 
note extends their range into Ribblesdale. 
(L.)  Fissidens crassipes (F. viridulus var. fontanus). Be- 
tween Clapham and Austwick. 
(L.)  Pleuridium subulatum. Ingleton. 
(R.)  Seligeria pusilla. Frequent in vertical clefts of the 
limestones. 
(R.)  Seligeria recurvata (S. setacea). On siliceous rocks of 
a soft texture. 
Cynodontium Bruntoni (Dicrano-weisia) (Oncophorus). 
In plenty in one place in Crummockdale. 
(R.) Blindia acuta. 
(R.)  Campylopus atrovirens. 
(L. R.) Grimmia subsquarrosa. 
(R.)  Rhacomitrium protensum (Grimmia aquatica). 
(R.)  Ptychomitrium polyphyllum (Glyphomitnium). 
(R.)  Hedwigia ciliata (H. albicans). In Arco wood, it is 
only in small quantity here, and occurs further 
south, beyond the faults, on millstone grit walls 
near Lawkland. 
* If this plan of giving the synonomy, whenever a difference exists in 
these three lists, were generally adopted, it would matter little which 
nomenclature was used by the writer at the time, and also would enable 
anyone to refer to our flora for the known distribution of any species at 
that time. Many beginners get Jamison’s Key to British Mosses in the 
reprint from the Journal of Botany, and with this the West Yorkshire 
Flora is in line, but when the worker takes up Dixon’s book a new system 
has to be mastered, and this later may have to be revised with Braith- 
waite’s, the latter being the only one to give a full synonomy. 
1915 Feb. 1. 
