bilimbia] lbcideacb* 135 



hypothecium thick, reddish-black ; spores fusiform-cylindrical, 

 3-septate, 0,015-18 mm. long, 0,004-5 mm. thick; hymenial 

 gelatine bluish then tawny -wine-red with iodine. — Toninia 

 squamulosa Mudd Man. p. 174 (1861). Lecidea squamulosa 

 Deakin ex Mudd I. c. ; Cromb. Lich. Brit. p. 79 ; Leight. Lich. 

 Fl. p. 331 ; ed. 3, p. 353. 



Exsicc. Larb. Lich. Hb. n. 181. 



Found originally by Salwey and partly described without name in 

 Trans. Penzance Nat. Hist. Soo. 1853, p. 144, where he says that in 

 age the squamules become flat, noncrenate, and lighter in colour. 

 The numerous apotheoia are either solitary or several congregate. 



Edb. On rocks, walls, and the soil in crevices, in maritime 

 rarely upland hiUy districts. — Distr. Eather local in England, rare 

 in N.E. Scotland, Ireland, and the Channel Islands. — B. M. Port 

 Gorey, Sark; above Anstey's Cove, Torquay, and near Kingsbridge, 

 Devon; near Truro, near Trengwainton, and at Madron Union, 

 Penzance, Cornwall ; Bathampton Hill, Somerset ; Malvern Hills ; 

 Worcestershire ; Barmouth, Merioneth ; Craigforda and Llanymynech, 

 Shropshire ; Slaghead Kirk, near Stonehaven, Kincardineshire ; Craig 

 Tullooh, Blair Athole, Perthshire ; Blaokwater, Kerry ; Lettermore, 

 Connemara, Galway. 



5. B. mesoidea A. L. Sm. — Thallus subdeterminate, sub- 

 opaque, unequal, subareolate-rimose, greyish or greyish-brown 

 (K— , CaCl — ). Apothecia moderate, at first thinly margined, 

 then convex, immarginate, black ; paraphyses slender, blackish 

 at the clavate apices ; hypothecium thick, reddish-black, the 

 inner layer of perithecium and base of hymenium yellowish-red ; 

 spores oblong, 3-septate, 0,014-20 mm. long, about 0,004-6 mm. 

 thick ; hymenial gelatine bluish then violet-coloured with iodine. 

 — Lecidea mesoidea Nyl. in Plora li. p. 475 (1868); Leight. in 

 Ann. Mag. Nat. Hist. ser. 4, iii. p. 268 (1869) & Lich. Fl. 

 p. 333 ; ed. 3, p. 350 ; Cromb. Lich. Brit. p. 78. L. subimbricata 

 Nyl. in Flora Ix. p. 460 (1877) ; Cromb. in Grevillea vi. p 112 ; 

 Leight. Lich. Fl. ed. 3, p. 350. 



Intimately related to the preceding, but differs in the more 

 crustaceous thaUus, the darker epithecium and the rather thicker 

 spores. According to Nylander it approaches Lecidea acclinis Plot., 

 a corticolous plant not found in Britain. In our specimen of L. 

 subimbricata the thallus is thicker and generally darker owing to the 

 presence of some blue-green alga; the specimen was collected in a 

 moist situation. 



Hab. On granitic and schistose rocks in maritime locaUties. — 

 Distr. Found only very sparingly in the Channel Islands, S. Wales, 

 and N.W. Ireland.— S. M. FUquet Bay, Jersey ; S9,rk ; Killery Bay 

 and Kylemore Lake, Connemara, Galway. 



6. B. sabulosa Massal. Kic. Lich. p. 122, fig. 239 (1852). 

 ■ — ^ Thallus determinate, thickish, granulose-squamulose, the 

 squamules small, more or less concrescent and crenate-lobulate, 

 greyish-white, greyish-brown, or cream-coloured (K — , CaCl — ). 



