330 CYCLOCARPINEE: [LECANORA 
Form atrata Cromb. Monogr i. p. 477 (1894).—Thallus 
reduced to minute red portions here and there on the black 
‘hypothallus. Apothecia minute.—Gyalecta atrata Ach. in Vet. 
Akad. Handl. 1808, p. 229. 
There are connecting links between the very reduced thallus of 
this form and that of the species. 
Hab. On quartzose rocks in an alpine locality —B. M. Morrone, 
Braemar, Aberdeenshire {the only British record). 
88. L. flavida Hepp Flecht. Eur. n. 630 (1860).—Thallus 
effuse, very thin, almost furfuraceous or thinly felted, scarcely 
cracked, with a radiating dirty-whitish hypothallus, pale- 
ochraceous or light-greyish (K —,CaCl—). Apothecia very minute, 
immersed, the disc concave then plane, black, the thalline margin 
thin, entire ; paraphyses coherent, slender, septate, submoniliform 
upwards, the epithecium of brown granules; spores ellipsoid, 
12-18 p» long (or slightly longer), 7-11 p thick; hymenial 
gelatine blue with iodine.—Leight. Lich. Fl. ed. 3, p. 195; 
Cromb. Monogr. i. p. 478. L. gibbosa f. lacustris Leight. Lich. 
Fl. p. 210 (1871) pro parte. Aspicilia ochracea Mudd Man. 
p. 163 (1861) (non Scheer.). 
Ezxsicc. Leight. n. 292 ; Mudd n. 136. 
Hue (Nouy. Arch. Mus. Nat. Hist. Paris, sér. 5, ii. p. 105) describes 
the gonidia of this species as ‘‘chroolepoid.”” Some of them are 
yellow, but they have not the large size of the Jonaspis group. 
Hab. On rocks and stones in moist situations in hilly districts.— 
Distr. Rare in N. England.—B. M. Cockshaw Bank and Ayton, 
Cleveland, Yorkshire. 
89. L. fulvo-mellea A. L. Sm.—Thallus effuse, very thin, 
smooth, in smaller or larger patches, comtiguous or scattered, 
yellowish or tawny-honey-coloured (K—, CaCl—). Apothecia 
numerous, impressed in the thallus, minute, the dise about 
*2 mm. wide, yellowish flesh-coloured, becoming slightly brown, 
the thalline margin thickish, entire and rather prominent, often 
circumscissed from the thallus ; paraphyses conglutinate, slender, 
sometimes flexuose, septate, submoniliform, the epithecium 
colourless or of yellowish-brown granules ; asci elongate-clavate, 
about 40-50 p long, 12 p» thick, 8-spored; spores ellipsoid, 
colourless, small, 8-12 » long, 4—5 p thick; hymenial gelatine 
scarcely greenish-blue then wine-red with iodine. 
The affinity of this lichen is with LD. Prevostii, or possibly with 
L. epulotica, but the gonidia, though with a thickish somewhat 
corrugate outer wall, are small on the whole, varying in form and size 
up to 20 » long and 12-14 » thick. It was impossible to trace any 
filamentous structure. 
Hab. On siliceous rocks.—B. M. Ashburton, Devon (Herb. H. B. 
Holl). 
Soa 
