Lett — On the Mosses of the Mourne Mountain District. 269 
augmented, for the ''Flora of the !N'orth-east of Ireland," published 
in 1888, edited by the same painstaking botanist, who again had the 
use of all Mr. Waddell's and my notes and exsiccati. 
And as to the lichens, I know of only one solitary Mourne locality 
given in Leighton's ''Lichen Flora of Great Britain and Ireland,'^ 
and none whatever in Admiral Jones's collection of lichens in the 
Science and Art Museum, Dublin. This is the more curious, as Jones 
collected these plants so diligently in Co. Armagh, Co. Antrim, and 
near Donaghadee in Co. Down. 
It may be interesting to compare the numbers of mosses and 
hepatics, found in the British Isles, and in Ireland alone, and in the 
IN'orth-east of Ireland, and in the Mourne district. The following 
Table will enable this to be done : — 
Species and Varieties. 
Mosses. 
Hepatics. 
The British Isles, . . . . . 
711 
233 
Ireland, as by the London Catalogue, . 
394 
154 
I^orth-east of Ireland, .... 
326 
76 
The Mourne District, 
275 
64 
The nomenclature I have used in the mosses is that adopted by 
Dr. Braithwaite in his exhaustive "British Moss Flora," so far as it 
has yet appeared, and for the rest the nomenclature of Lindberg in his 
Musci Scandinavim. 
In the hepatics I have chiefly used the names given in the same 
author's catalogue. 
It remains for me to acknowledge with feelings of gratitude the 
assistance in determination of difliculties that I have received from 
time to time from Dr. Braithwaite, Mr. G. S. Holt of Manchester, 
Mr. D. M'Ardle of Glasnevin Botanic Garden, and Mr. "Wm. West of 
Bradford. Whenever I applied to them they promptly and kindly 
afforded me the aid I sought. 
