ACAROSPORA | LECANORACE 335 
aggregate, irregularly roundish or angular, flat or tumid, pale 
fawn-coloured above and below (K + yellow then red). Apothecia 
one or more immersed in the squamules, small or moderate in 
size, the disc reddish, becoming darker, the thalline margin not 
prominent; paraphyses rather slender, flexuose, dotted with 
minute guttule, not widening upward, agglutinate and colourless 
or brownish at the tips; asci large, broadly oblong or ellipsoid, 
90-150 » long, 24-38 » wide; spores innumerable, cylindrical, 
minutely guttulate at each end, 2—4 yp long, | » thick; hymenial 
gelatine blue then wine-red, the hypothecium more persistently 
blue, with iodine. 
Evidently near to A. glawcocarpa, but differing in certain characters 
of thallus and apothecia. There is considerable variation in thalline 
form; the specimen from Cumberland is flat and cracked, in the others 
the squamules are alike tumid and generally roundish. The reaction 
with potash in one of the Yorkshire specimens is not very distinct 
and the paraphyses are slightly clavate or irregular and sometimes 
branched, septate, or capitate. This may be only a growth form, as 
the other characters are similar. The specimen was collected by 
Mr. Hebden and named by Harmand in honour of his friend Dr. Bouly 
de Lesdain, of Dunkirk. Owing to the war, Hebden has been unable 
to secure Harmand’s own description. 
Hab. On rocks in upland districts.—Dzistv. Somewhat rare in 
N.and N.W. England.—B. M. Near Keighley, Yorkshire ; Buttermere, 
Cumberland. 
5. A. percenoides Jatta Syll. Lich. Ital. p. 251 (1900).— 
Thallus thickish, warted-squamulose, the squamules rather small, 
convex, scattered or imbricate, chestnut-brown, whitish-pruinose, 
white beneath (K —, CaCl —). Apothecia minute, innate in the 
areol, reddish- or dark-brown ; paraphyses stoutish, very slightly 
clavate, brown and septate at the tips; spores ellipsoid, 3-6 p 
long, 1°5-2 p thick.—A. cervina var. percena Mudd Man. p. 159 
(1861)? Lecidea perczeena Ach. Syn. Lich. p. 29 (1814)? Lecanora 
castanea £. perceenoides Nyl. in Bull. Soc. Bot. x. p. 263 (1863). 
L. percenoides Nyl. ex Wedd. op. cit. xvi. p. 202 (1869) ; Cromb. 
in Grevillea xix. p. 58 (1891) & Monogr. 1. p, 482. 
The squamules in the British specimens are white bordered; the 
apothecia are badly developed. Mudd’s specimen of A. cervina var. 
percena has been determined by Crombie as identical with this species. 
It is impossible to be sure as the squamules are sterile. 
Hab. On caleareous rocks in upland situations.—Dzistr. Rare in 
ats and N.E. England.—B. M. Near Yatton, Somerset; Teesdale, 
urham. 
6. A. fuscata Th. Fr. Lich. Scand. p. 215 (1871) pro parte.— 
Thallus areolate-squamulose, the squamules crowded, angular and 
irregularly crenate-lobate, dull- or tawny-brown, blackish beneath 
(K(CaCl) + reddish). Apothecia minute, immersed, becoming 
partly superficial, the disc reddish- or dark-brown, the thalline 
