BDELLIA] LEOIDEAOEa: 167 



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

 tartareous, pulverulent or almost evanescent (K — , CaCl — ). 

 Apothecia scattered, punctiform, immersed, then superficial, 

 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, 0,014-16 mm. long, 0,007-9 mm. thick. — 

 Lecidea alociza Cromb. in Journ. Bot. ix. p. 178 (1871) (non 

 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. 



Hob. On rocks chiefly calcareous. — Distr. Ears in central England 

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

 Llandudno, Denbighshu-e. 



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 Sohser. Spicil. Lich. Helv. 

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

 p. 318. Buellia verruciclosa var. y8 spuria Mudd Man. p. 215 

 (1861). 



Exsicc. Leight. n. 217 pro parte. 



Distinguished from B. verruculosa, a, variety of which Mudd 

 regarded it, by the colourless hypothecium. 



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

 Wales; not recorded from Scotland or Ireland, but probably over- 

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

 Bank, Cleveland and near Ayton, Yorkshire. 



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

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

 somewhat convex (K -|- yellow, OaOl — ) ; hypothallus black. 

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

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

 hypothecium yellowish ; paraphyses indistinct, dark-brown and 

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

 mm. thick. — Lecidea occulta 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) & xi. p. 135 (1873); Leight. 

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



Exsicc. Leight. n. 217 pro parte. 



Differs from the preceding in the colour of the thallus, which is 

 thinner and often somewhat scattered, Crombie {I. c.) included 



