BIATORELLA | LECIDEACEE 473 
e 
margin.—Lecanora pruinosa var. albocincta Cromb. Monogr. 
i. p. 488 (1894). 
Hab. On the mortar of a wall in an upland district.—B. M. 
Mathon, Malvern Hills, Worcestershire (the only record). 
8. B. hypophea A. L. Sm.—Thallus effuse, thickish, unequally 
granulate, greyish- or dull yellowish-green (K—). Apothecia 
rather small, plane, dark-red or blackish, the proper margin 
unequal or subcrenulate, becoming excluded ; hypothecium pale 
or brownish ; paraphyses rather stout, thickly septate, variously 
widened at the yellowish-brown apices; spores many, oblong, 
5-6 » long, 1°5 » thick; hymenial gelatine bluish then wine-red 
or tawny with iodine.—Lecanora hypophza Nyl. in Flora lui. p. 
34 (1870) ; Cromb. in Journ. Bot. viii. p. 97 (1870) & Monogr. 1. 
p. 489 ; Leight. Lich. Fl. p. 186 ; ed. 3, p. 172. 
Differs from B. privigna, with which it is closely allied, in the 
presence of the superficial thallus and in the somewhat different 
spores; the paraphyses are exactly alike. 
Hab. On granitic stones of a wall.—B. M. Old Machar Cathedral, 
Aberdeen (the only record). 
9. B. flava A. L. Sm. ex Johns. in Naturalist 1917, p. 88.— 
Thallus effuse, thickish, unequally granulate-cracked or scattered 
and furfuraceous, dull ochraceous-brown (K—). Apothecia 
rather small (about *5 mm. in diam.), sessile or subinnate, some- 
times circumscissed, plane or rarely convex, dark reddish-brown 
or black, the thalline margin indistinct or disappearing ; hypo- 
thecium and hymenium colourless ; paraphyses slender, conglu- 
tinate above, flexuose, sparsely septate except near the tips 
which are slightly clavate and bright-brown; spores many, 
minute, oblong-ellipsoid, about 3 p long, 1-2 » thick; hymenial 
gelatine persistently blue with iodine.—Lecanora privigna var. 
Hava Johns. in litt. 
The thallus is not unlike that of B. hypophxa, but in the internal 
structure it differs from that species as also from B. privigna. 
Hab. On limestone in a quarry.—B. M. Near the Church, Forest, 
Teesdale, Durham. 
Thallus not evident. 
10. B. clavus Th. Fr. Lich. Scand. p. 409 (1874).—Thallus 
very reduced, occasionally a few granules only visible below the 
apothecia. Apothecia large, often aggregate, attached at a 
central point, sometimes several connate in a common attach- 
ment, concave then plane, dark-reddish or almost black, with a 
prominent proper margin which is persistent and crenulate ; 
hypothecium thin, blackish-brown; paraphyses conglutinate, 
stoutish, septate, scarcely widened at the tips, the epithecium 
dark-brown ; spores many, oblong-ellipsoid 4-5 p long, about 
2 » thick ; hymenial gelatine deep blue with iodine.—Patellaria 
