BUELLIA] " LKCIDFAOK.F. 167 



3. B. alocizoides A. L. Sm. — ^Thallus whitish-grey, thin, 

 tartareous, pulvei'ul(3iit or almost evanescent (K — , CaCl — ). 

 Apothecia scattered, piinctiform, immersed, then suj)crfici<il, 

 adnate, plane, brownish-black (paler when moist), with a paler 

 margin ; hypothecium colourless or faintly brownish ; paraphyses 

 subdiscrete, clavate and brown at the apices ; spores rounded- 

 oblong, dark-brown, 0,014-lG mm. long, 0,007-9 mm. thick. — 

 Lecidea alociza Cromb. in Journ. Bot. ix. p. 178 (1871) (nor,. 

 Massal.) ; Leight. Lich. Fl. p. 310. L. alocizoides Leight. Lich, 

 Fl. ed. 3, p. 325 (1879). 



Characterized by the absence of areolation in the thallus and the 

 minute emerging apothecia with colourless hypothecium. 



Hah. On rocks chiefly calcareous. — Distr. Eare in central England 

 and N. Wales. — B. M. Buxton, Derbyshire; Eglwyseg Eocks and 

 Llandudno, Denbighshire. 



4. B. spuria Koerb. Parerg. Lich. p. 183 (I860).— Thallus 

 dull-ash-greyish, smooth and cracked, areolate or in scattered 

 warts and granules ; hypothallus blackish. Apothecia black, 

 small, appressed or somewhat prominent, plane, with a thin 

 evanescent margin ; hypothecium colourless or brownish ; para- 

 physes loosely coherent, dark-brown or olive-brown at the clavate 

 apices ; spores elliptical or oblong-elliptical, obtuse at the ends, 

 somewhat slightly constricted, dark-brown, 0,008-15 mm. long, 

 0,004-7 mm. thick. — Lecidea spuria Schjer. Spicil. Lich. Helv. 

 p. 127 (1828) & Enum. p. 114 (1850) ; Leight. Lich. Fl. ed. 3, 

 p. 318. JBuellia verrucidosa var. /? spuria Mudd Man. p. 215 

 (1861). 



Exsice. Leight. n. 217 pro parte. 



Distinguished from B. verruculosa, a variety of which Mudd 

 regarded it, by the colourless hypothecium. 



Hab. On rocks. — Disfr. Eare in W., Central and N. England and 

 Wales ; not recorded from Scotland or Ireland, but ]->robably over- 

 looked. — B. M. Lynraouth, Devon; Lyth Hill, Shropshire; Carlton 

 Bank, Cleveland and near Ay ton, Yorkshire. 



5. B. occulta Koerb. Parerg. Lich. p. 186 (I860).— Thallus 

 greyish-yellow, effuse, thin, minutely cracked-areolate, the areolae 

 somewhat convex (K + yellow, CaCl — ); hypothallus black. 

 Apothecia minute, blackish-brown, adnate and margined by the 

 thallus, becoming convex, the proper margin more or less visilde ; 

 hypothecium yellowish ; paraphyses indistinct, dark-brown and 

 clavate at the tips ; spores ellipsoid, 0,014-17 mm. long, 0,007-8 

 mm. thick.- — Lecidea occidta Leight. in Grevillea i. p. 58, t. 4, f. 6 

 (1872), &, Lich. Fl. ed. 3, p. 325. L. leucoclinella Nyl. ex Cromb. 

 in Journ. Bot. ix. p. 179 (1871) c<i: xi. p. 135 (1873); Leight. 

 Lich. Fl. p. 310 ; ed. 3, p. 325. 



Exsice. Leight. n. 217 pro parte. 



DifTers from the preceding in the colour of the thallus. wLuch is 

 thinner and often somewhat scattered. Cronibie (/. c.) incUukd 



