37 
mulzie Linn, Braemar ; collected by myself in August, 1856. 
The apothecia of the Lecanora are studded over with micro- 
scopic black papillz, having a simple cavity, and an envelope 
of deep brown hexagonal cellular tissue, lined internally by 
a series of short, simple, filiform sterigmata, which give off 
spherical (atomic) corpuscles of the character of spermatia, 
colourless when young, but becoming brown in age; a cha- 
racter (the acquisition of a brown colour) at least unusual 
in spermatia and rare even in stylospores. The conceptacles 
in question must apparently be regarded as spermogonia! re- 
ferable to some parasite, but not to Spheria epicymatia, Wallr. 
(Nyl., Prodr., p.85; Syn., p. 42—= S. lichenicola, Smrf. pr. 
p. =S. lichenicola, DR\.,? whose spermogonia and pycnidia 
are quite different, unless we are to regard them as a secon- 
dary form of its spermogonia. 
(c) Var. albella, Auctt.: corticolous :? Kinnoull Hill, Perth; 
collected in April, 1855. Pycnidia are sparingly scattered 
over the thallus as minute black points, containing short, 
ellipsoid, narrow or broadish stylospores, about ‘00025” long, 
variable both in form and size; sometimes cohering in 
couples (concatenate), and then resembling portions of the 
spore-chains of Torula lichenicola: seated on very short, 
simple, inconspicuous basidia.4 
(d) Var. albella, Pers., Hepp’s Exsiccati, No. 187. Pycni- 
dia occur as small brown points scattered about the peri- 
phery of the thallus. Externally they closely resemble some 
forms of the spermogonia of the Lecanora, from which their 
internal structure alone distinguishes them. The stylo- 
spores are small, short, linear-oblong, straight, sometimes 
irregular as to size and form, generally 2-locular; seated on 
very short simple basidia. The wall of the receptacles is 
cellular, and deep brown.’ Here the pyenidia have quite as 
much the appearance of belonging to the Lecanora as its 
ordinary spermogonia have. 
(e) Corticolous form of type: Yester House, Haddington- 
shire; collected in July, 1856, by Dr. Murray Lindsay. 
1 Vide “Observations on W. Greenland Lichens,” p. 366, plate 1, 
fig. 15. ' 
2 Tt affects the apothecia of the Zecanora, and possesses both spermogonia 
and pycnidia. Probably, identical with it is 8. apotheciorum Mass. (‘ Berk. Brit. 
Fungology,’ p. 396). It is impossible to confound either of these Spherie 
(if they ave separate species or forms) with Zorula lichenicola, whose spore- 
chains, and brown or otherwise coloured spores, at once distinguish it. 
3 Lecanora intumescens of Hepp’s Exs., No. 614, is only a similar, if not 
the same, condition of LZ. subfusca. 
4 Vide “ Observations on W. Greenland Lichens,” p. 366, plate 1, fig. 17. 
* Ibid., p. 366, plate |, fig. 18. 
