25 
NEW BRITISH LICHENS. 
Communicated hy The Rev. J. M. Crombie, F.L.S. 
The following very considerable list of novelties has since my 
last notice in “ Grevillea ” been recorded by Nylander in the 
“Flora’; for 1876, No. 15, pp. 231-239, and No. 20 pp. 305-311— ' 
all of which, with one or two exceptions, have been detected by the 
researches of Mr. Larbalestier in the hitherto unexplored but evi- 
dently most productive district of Galway in N.W. Ireland, which, 
from its situation and physical features, may be expected in the 
future to yield a still larger number of rare or new species. 
1. Collema hypergenum. JVyZ.— Almost similar to C. melaenum^ 
but with larger spores (0,026-36 m.m. long, 0,010-16 m.m. 
thick), and consequently entitled to rank at least as a subspecies. 
On rocks. Connemara, Galway (Larbalestier). 
2. Lecanora subluta. Ay Thallus whitish, thin, minutely 
granulate, indeterminate (K — ) ; apothecia pale-yellow or sub- 
livid-yellow, crowded, deformed through mutual pressure, the 
thalline margin subcrenate ; spores 8-nae, ellipsoid, 0,010-12 
m.m. long, 0,005-6 m.m. thick; paraphyses not very distinct; 
hymenial gelatine bluish and then wine-reddish with iodine. 
var. perspersa, Nyl . — Apothecia scattered, distant, with no thallus 
visible between them. 
On dry calcareous rocks. Kylemore, Galway (Larbalestier). 
Belongs apparently to the section of L. galactina, but the sper- 
mogones have not been detected. 
3 Iiecanora baeomma. Nyl . — Thallus yellowish -white, opaque, 
thin, unequal (K yellow); apothecia pale -red, with epithalline or 
white thickisli thalline margin, subanguloso-deformed, scattereo ; 
spores 8-nse, colourless, oblong, 1-septate, 0,012-18 m.m. long, 
0,004-6 m.m. thick ; paraphyses slender, inspersed at the apices ; 
hymenial gelatine bluish and then tawny wine-coloured or wine- 
reddish with iodine. 
On moist micaceous rocks, at Kylemore, Galway (Larbalestier). 
4. Fertusaria concreta. JS’yl . — Thallus white or whitish, con- 
tinuous, thickish, rimose, unequal (K -f) ; apothecia immersed, 
endocarpoid, colourless, externally indicated by a dark or variable 
(not dark) punctiform ostiole ; spores 2-na?, 0,015-0,550 m.m. 
long, 0,052-0,080 m.m. thick; hymenial gelatine scarcely coloured 
with iodine, but the thecae intensely bluish. 
On moist micaceous rocks. Kylemore, Galway (Larbalestier). 
Formerly gathered only in Newfoundland* (Nyl. Enum. p. 117), 
* No doubt other North American lichens (maritime) will be detected on 
the north-west shores of Ireland, as may d priori be inferred on geological 
grounds. — J. M. C. 
