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VILI. New British Lichens. Ву the Rev. W. A. LEIGHTON, В.А. Camb., 
F.L.S., F.B.S. Ed. 
Plate XXII.) 
Read February 3rd, 1876. 
VERRUCARIA MYRIOSPORA, Leight. Pale yellowish, filmy, very thin, effuse or deter- 
minate by a pale brown watery line ; apothecia shining black, moderate in size, nume- 
rous, round or oblong, often difformed by confluence, sessile and conspicuous, 
hemispherico-subpapillate ; epithecium a very minute pore in the apex of the papilla ; 
perithecium dimidiate, spreading at the base, carbonaceous ; asci narrow, lineari- 
clavate; paraphyses few, very slender and delicate; spores innumerable, colourless, 
very minute, oblong or lineari-oblong, simple. 
On young oaks, Kylemore and Doughruagh, co. Galway (October 1875), Mr. Lar- 
balestier. 
A singular and peculiar species, differing in its general aspect and its innumerable very 
minute spores from any described species. Spores “003 mm. long, "0015 mm. broad. 
Spermogonia numerous, minute, roundish or clavate, black like the apothecia. Sper- 
matia large, linear, arcuate. Gelatina hymenia I—. 
VERRUCARIA SUCCINA, Leight. Thallus fuscescent, thin, effuse, scarcely if at all sur- 
rounding the base of the apothecia; apothecia amber-colour, numerous, large, 
hemispherico-conical, papillate; perithecium | amber-colour throughout,  dimidiate, 
spreading at the base; epithecium a minute роге in the apex of the papilla; para- 
physes very delicate and slender; asci lineari-clavate; spores 8, colourless, broadly 
Jusiform, 7-septate, large. 
On moist rocks near the lake, Kylemore, co. Galway, very rare, Mr. Larbalestier 
(1875). 
The apothecia, when wetted, became of a beautiful transparent amber-colour. Spores 
‘046 mm. long, “008 mm. broad. No spermogonia detected. Iodine has very n if 
any reaction on the asci and spores. Its nearest ally would seern to be F. illinita, N уі 
but that species differs in having a whitish thallus, nigricant apothecia, the perithecium 
colourless in the lower part, and fuscous in the upper part, and iodine батын the asci 
and spores of a dirty deep brown, and is also а corticolar lichen. y. succina differs also 
in the size and colour of the apothecia from 7. chlorotica (Ach.), which is consociate on 
the same rock, and which has also smaller 3-septate fusiform spores. 
LECIDEA SUBDILUTA, Leight. Thallus of a dark dirty sea-green colour, thin, effuse, xen 
tinuous, very slightly rimulose; apothecia pale, waxy, minute, elevato-sessile ; epi- 
thecium pale brown, plane or concave, surrounded by а thickish, pale, waxy, elevated 
я х9 
