LECANORA. | LECANO-LECIDEEI, 379 
39. L. atroflava Nyl. in Zwach Lich. Heidelb. (1813) p. 838.— 
Thallus subeffuse, smooth, thin, rimoso-diffract, continuous, um- 
brine-blackish (K—). Apothecia small, plane, biatorine, ochraceo- 
ferruginous (K+ purplish), the margin entire, paler; spores ellip- 
soid, polari-bilocular, 0,009-11 mm. long, 0,005-6 mm. thick.— 
Cromb. Grevillea, xviii. p. 45.—Lecidea atroflva Sm. Eng. FI. v. 
p. 185; ‘Turn. Linn. Trans. ix. (1808) p. 142, t. 11. f. 2. Lichen 
atroflavus Eng. Bot. t. 2009. Lecanora scotoplaca Nyl. Flora, 1876, 
p. 232. Lecanora ferruginea var. scotoplaca Leight. Lich. Fl. ed. 3, 
p. 209.— Brit. Evs.: Larb. Lich. Hb. n. 335. 
Near to L. cesiorufa, but apparently a distinct species. The thallus, 
usually more or less effuse, is at times when associated with other crus- 
taceous lichens (e. g. Lecanora campestris) well determinate. The apo- 
thecia are numerous and crowded, whence it has often been: confounded 
with var. holocarpa of L. pyracea. 
Hab. On siliceous rocks, usually exposed flints, in maritime, rarely 
upland tracts Distr. Local and scarce in S. and E. England, N. Wales, 
and in N.W. Ireland.—B. M.: Ryde, Isle of Wight; Beechy Head and 
the Downs, Sussex; Lyddbeach, Kent; Thetford Warren, Norfolk. 
Barmouth, Merionethshire; Island of Anglesea. Near Kylemore, Con- 
nemara, co. Galway. 
40. L. Turneriana Nyl. ex Cromb. Journ. Bot. 1876, p. 360.— 
Thallus thin, areolato-rimose or diffract, the areole verrucoso- 
unequal, dark-grey or brownish-black (K—). Apothecia small, 
plane or somewhat convex, biatorine, reddish-yellow, the margin 
thick, entire, persistent, paler yellow (epithecium K + purplish); 
spores ellipsoid, polari-bilocular, 0,011-16 mm. long, 0,007-10 mm. 
thick.—Leight. Lich. Fl. ed. 3, p. 209.—Lecidea Turneriana Ach. 
Lich. Univ. (1810) p. 206. 
Has the aspect of ZL. pyracea, but ditters in the colour of the thallus and 
apothecia, and especially in the thicker per The thallus varies from 
dark-grey to deep-brown, passing into black; but in our specimens it is 
‘but sparingly visible. The apothecia are usually scattered, though here 
and there a few are crowded, the epithecium being at times of a darker 
colour. 
Hab. On rocks in maritime districts—Distr. Seen only s aringly from 
S. Wales, N.W. England, and N.W. Ireland.—B. M.: St. David’s, Pem- 
brokeshire ; Barrowmouth, Whitehaven, Cumberland. Kylemore and 
Killerey Bay, Connemara, co. Galway. 
41. L. albolutescens Nyl. Flora, 1881, p. 177.—Thallus thin, 
subfarinaceous, continuous or somewhat scattered, whitish (K—), 
Apothecia moderate, prominent, orange-coloured, subbiatorine, thickly 
margined, the margin externally thalline and whitish, but orange 
on the upper portion, epithecium unequal (K+ purplish); spores 
‘ellipsoid, polari-bilocular, 0,015-18 mm. long, 0,007-10 mm. thick, 
the loculi large.—Cromb. Grevillea, x. p. 22. 
Not to be confounded with L. pyracea, from which it at once differs in 
the larger, thickly margined apothecia and the larger spores. As observed 
