of Edinburgh, Session 1881 - 82 . 
471 
YERRU CARIEiE. 
Yerrucaria rupestris, Schrad. v. alocizoides, Mull. Arg. : thalli 
plagulae irregulariter anguloso-orbiculares, vix \ cm. latae, varie 
confluentes, linea nigra cinctae et thallum collectivum crebre 
geographicum formantes. Sporae 18-24 /x longae, 11-15 fx latae. — 
Calcicola : B.C.S. 
Yerrucaria prominens, Mull. Arg. : thallns tenuis, continuus, 
laevis, olivaceo-virens ; apotbecia mm. lata, elato-semiglobosa, basi 
truncata, nigra, scabridula, primum thallo leviter velata, mox promi- 
nenti-emersa et nuda, vertice rotundato-obtuso integra, peritbecium 
integrum sed basi attenuatum ; paraphyses molliusculae, superne 
clavatae et ibidem 3 ju latae, septatae ; sporae 8-nae, oblongato-ovoideae 
v. ellipsoideae, 15-21 fx longae, 7-8 /x latae. — Graniticola : B.C.S. 
Microgl/exa saxicola, Mull. Arg, : similis M. Wallrothiance , sed 
tballus subfusco-olivaceus, mox rimoso-diffractus, verrucae tballinae 
paullo minores, circa ostiolum fuscum minus cinerascentes, sporae 
ambitu angustiores, 28-33 /x longae, 9-11 fx latae, transversim 
7-9-septatae, loculi longitrorsum 2-4-divisi. — Graniticola: Scbweinf. 
PY RENULE^E. 
Pyrenula obscurata, Mull. Arg. : tballus subcartilagineus, 
olivaceo-fuscus, superficie undulato-inaequaiis ; apotbecia sparsa, 
omnino immersa, obtecta, demum vertice denudata ; perithecium 
integrum, globosum, crassum, basi incrassatum, x 4 0 5 0 mm. latum ; 
paraphyses capillares, asci cylindrici, 8-spori ; sporae 23 fx longae, 
10-12 /x latae, 4-loculares, fuscae. — Corticola : B.C.S. 
P olyblasti a tropica, Mull. Arg. \ tballus hypophloeodes ; apo- 
thecia depresso-hemisphaerica, \ mm. lata, mm. alta, superne 
nitidula, perithecium dimidiatum, basi incurvatum et simul ex- 
trorsum attenuatum ; asci 3-4-spori ; sporae hyalinae, 25-28 u longae, 
10 [x latae, 6-8-loculares, loculi 2- 4docellati. — Ramulicola : B.C.S. 
Bathelium pauperrimum, Mull. Arg. : thallus hypophloeodes, 
peritbecia epidermide tecta, demum vertice paullo denudata, solitaria 
v. pauca confluentia et turn stroma minutulum fusco-nigricans 
