LECANORA | LECANORACEE 327 
Nearly related to L. complanata Koerb., but differing in the more 
compact crustaceous-areolate thallus and in the almost non-marginate 
apothecia. 
Hab. On siliceous rocks.—B. M. Lyth Hill, Shropshire. 
83. L. superiuscula Nyl. in Flora lxii. p. 355 (1879).— 
Thallus of small plane or slightly convex squamulose areolz, 
contiguous or scattered, rounded or crenulate, brown or light 
brownish-grey (K—, CaCl—). Apothecia minute, more or less 
immersed, blackish, the thalline margin thick and tumid ; spores 
ellipsoid, 10-14 pw long, 5-8 p thick; paraphyses subdiscrete, 
brownish at the apices.—Cromb. in Grevillea xiii. p. 112 (1880) 
& Monogr. i. p. 464. 
Considered by Crombie as similar to, if not identical with, L. com- 
planata Koerb., a lichen from the Tyrol, but the thalline margin of 
that species is thinner and crenulate. The spores are usually about 
10 » x 6p, the larger size has not been verified. 
Spermogones are plentiful with arcuate spermatia 18-25 » long, 
6 » thick. 
Hab. On a mica-schist rock in an alpine situation. B. M. Above 
Loch-na-Gat, Ben Lawers, Perthshire (the only record). 
84. L. morioides A. L. Sm.—Thallus determinate, thin, 
composed of minute blackish- or reddish-grey areole on a black 
hypothallus (K —CaCl—). Apothecia minute, immersed, solitary 
in the areole, the disc black, the margin thin, scarcely prominent ; 
paraphyses coherent, slender, septate, clavate at the dark coloured 
bluish-black tips ; asci thickened at the tips; spores 7-9 yp long, 
5 p thick ; hymenial gelatine blue then wine-red with iodine.— 
Aspicilia morioides Blomb. ex Arn. Lich. exsice. n. 904 (1881) ; 
Arn. in Verh. Zool. Bot. Ges. Wien, xxxvi. p. 78 (1886); Hue 
in Nouy. Arch. Mus. Paris, sér. 5, i1. p. 78 (1910). 
Our single specimen in the Hugh Davies herbarium differs slightly 
from the above as described by Hue, though too nearly alike to be 
separated. The tips of the paraphyses are dark-brown, and the spores 
—very rarely developed as Hue also points out—are larger and 
somewhat oblong, they measure 7 x 3 » or up to 12x 4 yp. The 
hymenial gelatine also remains persistently blue with iodine, It was 
labelled Verrucaria maura by Davies. The plant has been collected 
in Scandinavia, and in the Tyrol. 
Hab. On siliceous rock.—B. M. N. Wales. 
f, Thallus variously coloured, thin and mostly continuous. 
85. L. levata Nyl. in Flora lv. p. 364 (1872) ; op. cit. Ixiv. 
p-. 183 (1881).—Thallus determinate or effuse, thin, largely con- 
tinuous, cracked in places, especially towards the centre, smooth, 
shining, grey- or brown-olivaceous ; hypothallus black, often 
limiting the thallus (K—,CaCl—). Apothecia minute, immersed, 
