LECANORA. ] LECANO-LECIDEEI. 467 
Hab. On rocks and walls in maritime and mountainous tracts.—Distr. 
Rather local, though plentiful where it occurs in Great Britain, Ireland, 
and the Channel Islands.—B. M.: La Coupe, Island of Jersey ; Moulin 
Huet Bay, Guernsey. Bray Hill, St. Minver, Cornwall; Cader Idris and 
Barmouth, Merionethshire ; Snowdon, Carnarvonshire ; Teesdale, Durham. 
Barcaldine, Argyleshire; Glen Lochay, Killin, and Ben Lawers, Perth- 
a i Portlethen, Kincardineshire. Lambay Island, co. Cork; co. 
icklow. 
Form lepidota Leight. Grevillea, iii. (1875) p. 116; Lich. Fl. 
ed. 3, p. 173.—Thallus greyish-brown, squamuloso-areolate, the 
squamules convex, often rugose. Apothecia innate, small; the 
thalline margin persistent.—Cromb. Grevillea, xix. p. 57. 
Differs in the more squamulose and darker thallus, which renders it a 
good form, if not a distinct variety. Both apothecia and. spermogones 
are frequent in the specimens seen. 
Hab. On maritime rocks and by lakes in mountainous districts.— 
Distr, As yet only in the Channel Islands and N. Wales.—B. M.: 
Benet Island of Jersey. Llyn Dinas, near Beddgelert, Carnarvon- 
shire. 
Subsp. L. epiglypta Nyl. Flora, 1881, p. 4.—Thallus rimoso- 
areolate, dark-greyish, the areole plane. Apothecia at length 
promiuent, somewhat convex, the epithecium crowdedly corrugate 
or ruguloso-insculpt : otherwise as in the type.—Cromb. Grevilica, 
xix. p. 57. 
Well distinguished by the peculiar character of the epithecium, which 
gives the fruit as it were a gyrose appearance. This, however, is not 
visible in the young urceolate apothecia. The spermogones are frequent, 
with spermatia straight, 0,015-23 mm. long, 0,0005-6 mm. thick. 
Hab, On schistose rocks in maritime and mountainous districts.— Distr. 
Only very pparioely in N. Wales and the 8.W. Highlands of Scotland. 
—B. M.: Cader Idris, Merionethshire. Barcaldine, Argyleshire. 
164. L. intermutans Nyl. Flora, 1872, pp. 354, 429.—Thallus 
determinate, diffracto-areolate, whitish or cesio-greyish (K + yellow, 
then rusty red, CaCl—). Apothecia submoderate, immersed, con- 
eave, blackish ; the thalline margin entire, at length inflexed ; spores 
usually 8nzx, 0,023-34 mm. long, 0,009-0,015 mm. thick; hy- 
menial gelatine bluish, then wine-red with iodine. — Cromb. 
Grevillea, xix. p. 57. 
Closely allied to the preceding species, but differs in the larger spores 
and the much shorter spermatia, which are 0,007-9 mm. long, scarcely 
0,001 mm. thick. Nylander says that the thallus in the E. Pyrenees is 
at times milky-white, and often occurs insvfated, from the intrusion of 
rudimentary thalli of other species. In the single British (fragmentary) 
specimen seen it is associated with Lecanora atra. 
Hab. On schistose rocks in a maritime district Distr. Extremely local 
and scarce in W. Ireland.—B. M.: Near Kylemore, Connemara, co. 
Galway. 
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