NEW BRITISH LICHENS. 
113 
spores 8 lue, colourless, oblong, 3-septate, 0,013-16 mm. long, 
0,0035-0,0040 mm. thick ; epithecium blackish ; paraphyses dis- 
crete, nearly moderate ; hypotheciiim with the peritheciiim rubri- 
cose ; hymeneal gelatine bluish with iodine. 
On limestone rocks, near Kylemore (Larbalestier). 
Allied to L squamulosa, 
12. Lecidea biloculata. Nyl . — Thallus macular, diffuse, silvery- 
white ; apothecia black, adnate, small, margined, internally dark 
in section ; spores 8 n£e, brown, ellipsoideo-fusiform, bilocular 
(placodiornorplious), 0,015-18 mm. long, 0,008 mm. thick ; para- 
physes sub-moderate, soft, the apices clavate, brown ; hypothecium 
brown ; hymenial gelatine deep blue with iodine. 
On the bark of holly, near Kylemore (Larbalestier). 
13. Lectdea continuior. Nyl . — Similar to L. lat.ypea (Ach.), 
but differing in the thallus, being somewhat plane, rimoso-areolate, 
and with Ca cl -f orange. 
On schistose rocks, Kylemore (Larbalestier). 
var. subvizidans. Ntjl . — Thallus yellow, plane, thin, areolato- 
diffi act, sored iose ((7a c/ -f orange) ; peritheciiim blackish ; hypo- 
thecium brown. 
On walls, Kylemore, Galway (Larbalestier). 
14. Lecidea chlozoscotina. Nyl. — Thallus greyish-green, thin, 
rugulose, rimoso-diffract ; apothecia black, somewhat plane or 
convex, moderate, subrugulose, concolorous within ; spores 8 na?, 
colourless, oblongo-lusiform, simple, 0,008-0,014 mm. long, 0,003- 
4 mm. thick ; paraphyses moderate, blackish and clavate at the 
apices ; hypothecium black, bluish above (K somewhat violet) ; 
hymeneal gelatine bluish and then tawny-reddish ; spermatia 
ellipsoid, 0,002 mm. long, 0,001 mm. thick. 
On siliceous rocks, Kylemore, Galway (Larbalestier). 
Allied to L. chalybeia^ Borr., of which, perhaps, it is a sub- 
species, differing chiefly in the hypothecium and spores. 
15. , Lecidea particularis. Hyl. — Thallus none ; apothecia black, 
plane, margined, moderate, internally subcoiicolorous ; spores 
8 n^, blackish-brown, ellipsoid, 1-septate, 0,008-0,010 mm. long, 
0,0035-45 mm. thick ; paraphyses slender, not very distinct ; 
hypothecium and perithecium blackish ; hymeneal gelatine deep 
blue with iodine. 
Parasitic, on the thallus of Bccomyces rufus., Kylemore, Galway 
(Larbalestier). 
Belongs to the section of L. parasitica, and readily distinguished 
by its 1-septate spores. 
16. Opegrapha atrula. Nyl . — Thallus scarcely any ; apothecia 
black, oblong, short simple ; epithecium rimiform ; spores 8 nm, 
colourless, fusiformi-oblong, 3 septate, about 0,016 mm. long, 
0,0035 mm. thick. 
On dry shady schistose rocks, Kylemore (Larbalestier). 
Allied to 0, atra. 
