LECANORA. | LECANO-LECIDEEI, 401 
mm. long, 0,010-11 mm. thick; paraphyses not very discrete, 
brownish at the apices.—Cromb. Grevillea, xviii. p. 47.—Rinodina 
Conradi Koerb. Syst. Lich. Germ. (1855) p. 123. Lecanora pyre- 
niospora Nyl. Cromb. Lich. Brit. p. 49; Leight. Lich. Fl. p. 280, 
ed. 3, p. 222.— Brit. Ews.: Larb. Caesar. n. 78; Lich. Hb. n. 263. 
_ Closely resembles L. turfacea var. archea Ach., which does not occur 
in our Islands, but differs in the character of the spores. The thallus, 
which elsewhere varies in thickness, is in our specimens thin and at times 
almost obliterated The apothecia are either scattered or crowded, the 
young spores being 1-septate. 
Hab. On decayed turf and the ground, rarely on old excrements of 
sheep, in maritime and upland districts — Distr. Local and sparingly in 
the Channel Islands, E. England, and 8. Wales.—B. M.: La Moye, Jersey; 
Islands of Sark and Jethou. Thetford Warren, Norfolk. 
72. L, diplinthia Ny]. Ann. Sc. Nat. t. xix. (1863) p. 316.— 
Thallus indeterminate, thin or thinnish, unequal or subgranulose, 
pale-greyish or pale-whitish (K —, CaCl—). Apothecia small, plane, 
brown (internally pale), the thalline margin entire ; spores ellipsoid, 
4-locular (the two apical loculi simple, the two central each with 2 
or sometimes 3 transverse cells), 0,023-34 mm. long, 0,012-16 mm. 
thick ; paraphyses scarcely discrete.—Leight. Lich. Fl. p. 230, ed. 3, 
p. 222 
An interesting plant, formerly known only corticolous from New 
Granada, 8. America. It is allied to the preceding species, but differs in 
the character of the thallus, and in the smaller apothecia with their entire 
thalline margin. The two British specimens seen are fragmentary, but 
with numerous, crowded apothecia. 
Hab. On the ground in fissures of rocks in a maritime district.—Distr. 
Extremely local and scarce in one of the Channel Islands.—B. M.: The 
Eperquerie and D’{xcart Bay, Island of Sark. 
73. L. umbrinofusca Nyl. Flora, 1860, p. 889.—Thallus deter- 
minate, thin, subcontinuous or obsoletely rimulose, umbrine-brown 
or umbrine-blackish (K—, CaC!—); hypothallus subplumoso-radi- 
ating, leaden-coloured, usually limiting the thallus. Apothecia 
lecideoid, minute, adnate, black, submarginate; spores brown, 
0,010-11 mm. long, 0,006-7 mm. thick; epithecium brown ; hypo- 
thecium colourless.—Cromb. Grevillea, x. p. 23. 
‘Looks quite a Lecidea, though the young apothecia are sublecanorine. 
The spermogones have not been seen, but it evidently belongs to this 
section, near to L. griseqfusca Nyl., a Finland plant, to which it seems 
closely related. It forms small, dark macule upon the substratum, 
which here and there become subconfluent. The single specimen seen is 
well fertile. 
Hab. On siliceous stones in an upland tract.— Distr. Found only very 
sparingly in E. England.—B, M.; Thetford Warren, Norfolk. 
74, L. equata Nyl. Flora, 1884, p. 392.—Thallus effuse, thin, 
2D 
