of Edinburgh, Session 1881 - 82 . 
467 
Opegrapha microspora, Mull. Arg, : thallus flavescenti-albus, 
subtenuis, levigatus et continuus (demum evanescens) ; apothecia 
semi-immersa, dein superficialia, J mm. lata, demum 2 mm. longa, 
subsimplicia, evoluta late aperta, discus albo-pruinosus, demum 
denudato-niger ; sporae 11-13 fx longae, 3-3^ /x latae, 3-5-septatae. — 
Corticola : B.C.S. 
Opegrapha sororiella, Mull. Arg. : thallus tenuissimus, indeter- 
minatus, argillaceo-albus, levis, subfarinulentus ; apothecia sessilia, 
1J-2J mm. longa, mm. lata, linearia, arcuato-curvata, simplicia 
y. 3-4-radiata, pro latitudine sat elata, undique nigra et opaca, 
nuda, margines arete conniventes, discus angustus, niger; sporae 16 
[x longae, 6 /x latae, 4-loculares, late dactyloideae. — Ramulicola : 
B.C.S. 
Melaspilea stigmatea, Mull. Arg. : apothecia in thallo alieno 
immersa, nonnisi margine tenuissimo nigro-fusco leviter emergentia, 
orbicularia v. orbiculari-elli|)tica, q-j— ^ mm. longa, plana, nuda, 
fusco-nigra, opaca ; rnargo subtus continuus, tenuis ; sporas evolutae 
pallide fuscae, ovoideae, 12-14 /x longae, 7-8 fx latae, in^qualiter 
3-loculares, sc. bilocularium loculus inferior paullo longior et 
angustior mox ipse transversim divisus. — In thallo Dirince rejpandoe : 
B.C.S. 
Graphis brachycarpa, Mull. Arg. : thallus coerulescenti-albus, 
tenuis, levis et continuus ; lirellae breves, J-f v. saepe 1 mm. 
longae, saepius 2-3 -plo longiores quam latae, emersae, rigidae, rectae 
v. subrectae, lateraliter altiuscule thallino-vestitae, rima angusta, 
perithecium basi deficiens, discus niger subocclusus ; sporae 8-nae, 
20-27 fx longae, 7-8J [x latae, 9-loculares. — Ramulicola : Schweinf. 
Graphis inusta, Ach. v. radians, Miill. Arg. : apothecia medioeria, 
stellato-radiantia, radii semel v. bis dichotome divisi, ramuli acuti. — 
Ramulicola : Schweinf. 
Graphina Balfourii, Mull. Arg. : thallus giganteus, crassus, 
corticiiformis, 2-3 v. hinc inde usque 5 mm. crassus, abrupte 
limitatus, continuus et levis, argillaceo-nigricans v. pallidior, intus 
pallidior ; apothecia 8-12 mm. longa, radiatim divisa, immersa et 
VOL. xi. 3 o 
