PERTUSARIA. | LECANO-LECIDEEI. 495 
Hab. On trunks and branches of trees, very rarely on schistose rocks, in 
maritime and upland districts—Distr. Not uncommon in England and 
Wales; rarer in Ireland; very rare in the S.W. Highlands of Scotland. 
—B. M.: Shiere, Surrey; St. Leonard’s Forest and Glynde, Sussex: 
Isle of Wight; Lyndhurst, New Forest, Hants; East Lynn, Devonshire ; 
Bocconoc, Cornwall; Cirencester, Gloucestershire ; Twycross, Leicester- 
shire; Barmouth and Cwm Bychan, Merionethshire; Conway Falls, 
Carnarvonshire ; Brantsdale, Yorkshire ; Teesdale, Durham; Asby, Cum- 
berland. Barcaldine, Argyleshire. Ravenscourt, co. Wicklow; Castle- 
bernard, co. Cork; Cromaglown and Turk Mt., Killarney, co. Kerry; 
Kylemore Lake, Connemara, co. Galway. 
Form 1. laevigata Cromb.—Thallus thin, continuous or very 
slightly rimose, scarcely subrugulose, the thalline verruce depressed, 
more or less scattered—Variolaria multipuncta var. B. levigata 
Turn. & Borr. Lich. Br. (1839) p. 73; Sm. Eng. Fl. v. p. 170. 
V. constellata Tayl. in Mack. Fl. Hib. ii. p. 113 pro parte. 
Apparently only a less developed condition resulting from the nature 
of the substratum. 
Hab. On smooth bark of young trees in wooded upland tracts.— Distr. 
Only a few localities in S. England and S.W. Ireland—B. M.: St. 
Leonard's Forest, Sussex ; New Forest, Hants; Falls of Beckey, S. Devon. 
Askew Wood, co. Kerry. 
Form 2. fastigiata Cromb.—Thalline verruce submoderate or 
somewhat large, hemispherical, crowded, substipitate, fastigiate and 
sorediate at the apices: otherwise as in the type.—Pertusaria fasti- 
gata Leight. Ann. Mag. Nat. Hist. 1870, vi. p.474; Lich. Fl. p. 245, 
ed. 3, p. 236. Isidium oculatum var. 6. fastigiatum Turn. & Borr. 
Lich. Br. (1839) p. 108, fide Leight.; Sm. Eng. Fl. v. p. 232. Vario- 
laria polythecia Tayl. in Mack. Fl. Hib. ii. p. 118. 
A well-marked form, if not a distinct variety, differing in the character 
of the verruce. Dr. Taylor /. ¢. says that it is “conspicuous by the 
crowded and stalked apothecia placed in contact, like certain basaltic 
columns.” In the few specimens seen the spores are very seldom well 
developed. 
Hab. On naked rocks and incrusting mosses in mountainous regions. 
-—Distr. Found only in 8. and W. Ireland. (Bantry, co. Cork; Conne- 
mara, co. Galway.)—B. M.: Dunkerron, co. Kerry. 
7. P.globulifera Nyl. Mém. Soc. Cherb. v. (1857) p. 116.— 
Thallus suborbicular, cartilagineo-membranaceous, verrucoso-rugose, 
greyish or glaucous, white-sorediate, smoothish and zonate at the 
circumference (K—, CaCl—). Apothecia inclosed in large thalline 
verruce, which are at first globular, closed, slightly depressed at the 
apices, corticate, at length lacero-dehiscent, pseudo-scutelliform, 
white-sorediate; spores (rarely 2ne) 0,207-276 mm. long, 0,050- 
80 mm. thick.—Mudd, Man. p. 273 (excl. vars.) ; Cromb. Lich. Brit. 
p. 59 (excl. vars.); Leight. Lich. Fl. p. 248, ed.3, p. 233.— Variolaria 
globulifera Turn. Trans. Linn. Soc. ix. (1808) p. 189; Turn. & Borr. 
