rERTTJSARIA.] LECAXO-LECIDEEI. 495 



Hab. On trunks and branches of trees, very rarely ou 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. Ravenscotirt, 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 vernicae depressed, 

 more or less scattered. Variolaria multipuncta var. /3. Icevigata 

 Turn. & Borr. Lich. Br. (1839) p. 73 ; Sm. Eng. Fl. v. p. 170. 

 V. constdlata Tayl. in Mack. Fl. Hib. ii. p. 113 pro parfce. 



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 AVood, co. Kerry. 



Form 2. fastigiata Cromb. Thalline verrucse submoderate or 

 somewhat large, hemispherical, crowded, substipitate, fastigiate and 

 sorediate at the apices : otherwise as in the type. Pertusaria fasti- 

 gata Leight. Ann. Mag. Xat. Hist. 1870, vi. p. 474 ; Lich. Fl. p. 245, 

 ed. 3, p. 236. Isidium oculatum var. /?. fastiyiatum Turn. & Borr. 

 Lich. Br. (1839) p. W3,fide Leight.; Sm. Eng. Fl. v. p. 232. Vario- 

 laria polythecia Tayl. in Mack. Fl.Hib. ii. p. 113. 



A well-marked form, if not a distinct variety, differing in the character 

 of the verrucse. Dr. Taylor /. c. 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 S. and W. Ireland. (Bantry, co. C.u-k; Conne- 

 mara, co. Galway.) B. M. : Dunkerron, co. Kerry. 



7. P. globulifera 3S T yl. Mem. 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 

 verrucae, which are at first globular, closed, slightly depressed at the 

 apices, corticate, at length lacero-dehiscent, pseudo-scutelliform, 

 white-sorediate ; spores (rarely 2nae) 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. 243, ed. 3, p. 233. Variolaria 

 globulifera Turn. Trans. Linu. Soc.ix. (1808) p. 139; Turn. & Borr. 



