LECANORA,] LECANO-LECIDEET. 445 
violet-red with iodine.—Cromb. Grevillea, xviii. p. 69.—Lecanora 
albariella Nyl. Bot. Zeit. 1861, p. 338 (nota), cfr. Act. Soc. Linn. 
Bord.t.xxv. (1864) p. 63; Jones, Nat. Hist. Soc. Dublin, 1864, p. 119; 
Cromb. Lich. Brit. p. 50; Leight. Lich. Fl. p. 229, ed. 3, p. 219. 
Apparently a good subspecies, characterized by the differences given in 
the thallus and apothecia. According to Nylander in litt., L. (Aspicilia) 
lactea Mass. Symm. Lich. 1855, p. 26, is scarcely different. The two 
British specimens seen are fairly typical and well fertile. 
Hab. On calcareous (rarely arenaceous) rocks and mortar of walls in 
maritime districts.—Dzstr. Extremely local and scarce in 8. England and 
N.E. Ireland.—B. M.: Isle of Wight, Hampshire ; near Eastbourne, 
Sussex. Glenarm, co. Antrim. 
Subsp. 2. proteiformis Nyl. Flora, 1881, p. 538.—Thallus thickish 
or somewhat thin, granuloso-verrucose, areolato-diffract or subpul- 
verulent, glaucous-grey, greenish-brown or sordid-white. Apo- 
thecia biatorine, at first plane and thinly margined, then convex 
and immarginate, yellowish-brown, reddish-brown or blackish, 
naked or pruinose ; spores 1-septate, 0,009-12 mm. long, 0,003-4 
mm. thick ; hymenial gelatine bluish with iodine.—Biatora protei- 
formis Mass. Sched. crit. (1855) p. 92. 
Very variable in external appearance, but distinguished by the smaller 
spores, which in our specimens are 0,010-11 mm. long, 0,0035 mm. 
thick. These were erroneously referred by mein Journ. Bot. 1874, p. 148, 
to L. lactea (Mass.), to which they are superficially subsimilar. 
Hab. On calcareous rocks and walls in upland tracts.—Distr. Only 
sparingly in W. England,—B, M.: Bathampton Downs, Somersetshire ; 
near Painswick and Cirencester, Gloucestershire. 
135. L. pheoleucodes Nyl. Flora, 1879, p. 356.—Thallus effuse, 
deplanate, areolato-diffract, whitish (K—, CaCl—). Apothecia 
minute, convex, ‘brown, biatoroid, the thalline margin speedily ex- 
cluded ; spores 0,016-20 mm. long, 0,005 mm. thick ; hymenial 
gelatine bluish, then wine-red with iodine.—Cromb. Grevillea, viii. 
p- 112. 
Probably distinct from Z. erysibe, to which in the apothecia it is sub- 
similar, though differing in the longer spores. The thalline margin of 
the apothecia, which are darker in age, is visible only in their young 
condition. The spermogones, which are common, have the spermatia 
arcuate, 0,016-20 mm. long, 0,0005 mm. thick, 
Hab. On a calcareous rock in a maritime district.— Distr. Local and 
scarce in the 8.W. Highlands of Scotland.—B. M.: Island of Lismore, 
Argyleshire. 
136. L. Hutchinsia Nyl. Flora, 1867, p. 336.—Thallus effuse, 
thin, rimose or rimuloso-diffract, pale- or yellow-greyish (K—, 
CaCl—). Apothecia small, convex, biatoroid, the thin thalline 
margin being speedily excluded, red-testaceous, whitish within ; 
spores fusiform, usually distinctly 1-septate, 0,010-12 mm. long, 
