NEW BRITISH LICHENS. 
107 
apothecia black, convex, often 2-4 connate, internally concolorous ; 
spores 8 nae., ’bacillar or subacicnlar, thinly 3-septate, 0,022-30 
mm. long, 0,0025-0,0035 mm. thick, paraphyses slender, not well 
discrete, hypothecium brown ; hymeneal gelatine scarcely tinged 
with iodine, but the thecae bluish, especially at the apices. On 
Jungermannias, near Kylemore, Galway (Larbalestier). This 
belongs, perhaps, to a distinct section. 
6. Lecidea supernula. Nyl . — Thallus none proper; apothecia 
black, plane, slightly margined, or at length convex and immarginate, 
usually 3-6 aggregated, internally concolorous; spores 8 nae., 
colourless, oblongo-oviform, 1-septate, 0,009-0,014 mm. long, 
0,004-5 mm, thick, paraphyses moderate, or nearly thickish, 
bluish-black at the clavate apices, hypothecium (and perithe- 
cium) bluish-hlack, above rubricose-red ; hymeneal gelatine wine- 
red with iodine. Parasitic on the thallus of Lecanora calcarea 
var. Hoffmanni^ on calcareous rocks, in the Island of Lismore, 
Argyleshire (Crombie). Allied to L. arthoniza. 
7 . Lecidea alumnula. Nyl . — Thallus white, thin, maculate or 
insulated, the insulas somewhat sublobate (K — ) ; apothecia black, 
subinnate, plane, margined, and often umbonate in the centre, 
internally concolorous ; spores 8 nas., colourless, ellipsoid, simple, 
0,009-0,012 mm. long, 0,005-6 mm. thick, paraphyses not discrete, 
epithecium and hypothecium with the peritliecium blackish- 
brown ; hymeneal gelatine bluish, and the thecae wine-coloured 
with iodine. On the thallus of Lecidea contigua in a rivulet near 
Letterfrack, Galway (Larbalestier). It belongs to the section of 
L. contigua. 
8. Lecidea perluta. Nyh — Thallus glaucous-white, or ochraceo- 
glaucescent, thin, continuous, rimose, apothecia rusty-reddish, or 
rusty-brownish, plane, margined, the margin usually paler, internally 
subconcolorous ; spores 8 nae., colourless, ellipsoideo-oblong, murali- 
divided, 0,030-0,042 mm. long, 0,013-16 mm. thick, paraphyses 
slender, sufficiently regular, epithecium (in thin section) and 
peritliecium reddish-yellow, hypothecium (at least in the centre) 
somewhat darkly reddish ; hymeneal gelatine bluish, the thecae 
dark . tawny wine-coloured with iodine. On quartzose rocks. River 
Erriff, Galway (Larbalestier). Although the apothecia are 
biatorine, its systematic place is near to Lecidea excentrica. 
9. Gxaphis xamificans. Nyl . — Thallus macular, whitish, sub- 
rugulose (K x yellowish, and then orange), apothecia dendroideo- 
ramose, black, naked, striatulate, slightly prominent; spores at 
length pale blackish, 10-12 locular, 0,032-45 mm. long, 0,008-10 
mm. thick. On the hark of Holly, Connemara, Ireland (Larba- 
lestier}. Nearly similar to Gr. striatula^ but distinguished by the 
dendroideo-branched apothecia. 
10. Vexxucaxia dissepta. Nyl. — Thallus (if proper) greyish- 
whitish ; with an ochraceous tinge, rimoso-areolate, thin ; apothecia 
