392 : LICHENACEI. [LECANORA. 
B. Apothecia biatorino-lecanorine ; spores 8nx, 1-septate, colourless ; 
hymenial gelatine variously tinged with iodine. Spermogones 
with shortly jointed sterigmata and straight short spermatia. 
56. L, holophea Nyl. Bull. Soc. Bot. t. viii. (1861) p. 755.— 
Thallus determinate, squamulose, lurid-brown or cervine-chestnut ; 
squamules firm, difform, subcontiguous or somewhat imbricate, 
repand or obtusely crenate at the margins (K—,CaCl—). Apo- 
thecia small, adnate, at first plane, with entire thalline margin, 
at length convex and biatoroid, dark-brown or concolorous with 
the thallus: spores sometimes 6ne, oblongo-fusiform, 0,014-18 mm, 
long, 0,004-5 mm. thick; paraphyses moderate, slightly incrassate 
and infuscate at the apices, hypothecium colourless; hymenial 
gelatine and especially the apices of the thece bluish with iodine. 
—Carroll, Journ. Bot. 1866, p. 23; Cromb. Lich. Brit. p. 48; 
Leight. Lich. Fl. p. 227, ed. 3, p. 217.—Psoroma holophcea Mont. in 
Hist. Nat.-Canar. (1840) p. 113. Thalloidima sublurida (Nyl.), 
Mudd, Man. p. 172.— Brit. Exs.: Leight. n. 380. 
Might readily be taken for a Lecidea allied to ZL. lurida, were it not 
that the young apothecia, seldom present in our specimens, are distinctly 
lecanorine. Its true place is also well indicated by the character of the 
spermogones, which are not unfrequent. Our Herbaria specimens, owing 
to the fragile nature of the habitat, are chiefly fragmentary, but in the 
few which are perfect the thallus is small, orbicular, and well fertile. 
Hab, On the ground in crevices of rocks and walls in maritime, very 
rarely upland districts.— Distr. Local in the Channel Islands, 8. and W. 
England, 8. and N.E. Ireland.—B. M.: Moulin Huet Bay, Island ot 
Guernsey. Pulborough, Sussex ; Bradstone churchyard and near Prawle 
Point, 8. Devon; near Penzance, Cornwall; near Bridgenorth, Shrop- 
shire. Ardglass, co. Down ; Sybil Head, co. Kerry; Coast of co. Clare. 
Var: 6. glaucopsora Ny]. Flora, 1868, p. 164; ofr. p. 473,— 
Thallus subeffuse, squamuloso-crenate, granuloso-squamulose or 
subleprose, glaucous- or greyish-white (K—,CaCl—),. Apothecia 
moderate, livid-brown, the thalline margin subentire; spores fusi- 
form, 0,012-18 mm. long, 0,003-4 mm. thick ; paraphyses slender, 
clavate and brownish at the apices——Cromb. Lich. Brit. p. 48; 
Leight. Lich. Fl. p. 227, ed. 3, p. 218.—Brit. Exs.; Larb. Ozsar, 
n, 79. 
Only a well-marked variety, though differing from the type in colour, 
the less developed thallus, and some other minor characters. It is rather 
variable in texture, becoming at length almost entirely leprose, the squa- 
mules being only here and there visible. The thalline margin of the 
rather scattered apothecia is persistent. The spermogones are not un- 
frequent with spermatia 0,003 mm. long, 0,001 mm. thick. 
Hab. On rocks in maritime districts —Distr. Only sparingly in the 
Channel Islands and S.W. England.—B. M.: Grosnez Common, Island 
of Jersey ; Saint’s Bay, Island of Guernsey ; Island of Alderney. Near 
Endellion and Penzance, Cornwall. 
