226 GBAPHIDEI [mELASPILEA 



margin inflexed ; asci clavate, 8-spored ; spores linear-oblong, 

 often slightly constricted in the middle, dark-brown or nearly 

 blackish, 0,015-23 mm. long, 0,008-12 mm. thick; hymenial 

 gelatine bluish with iodine. — Opegrapha cerebrina DC. Fl. Pr. ii. 

 p. 312 (1805) ; Borr. Engl. Bot. Suppl. t. 2632. f. 1 ; Hook, in 

 Sm. EngL Fl. V. p. 146 ; Leight. in Ann . Mag. Xat. Bjst. ser. 2, 

 xiii. p. 88, t. 5, £ 2 (1854) ; Cromb. Lich. Brit. p. 100. Melano- 

 gpora cerebrina Mudd Man. p. 226, t. 4, f. 88 (1861). Litho- 

 grapha cerebrina Leight. Lich. Fl. p. 361 (1871); ed. 3, p. 394. 



Bah. On calcareous rocks in hilly districts. — Distr. With cer- 

 tainty only in X. England and S.W. Ireland. — B. M. Penhill, York- 

 shire ; Teesdale, Durham; TVhitbarrow, Cumberland; Dunkerron. 

 Kerry. 



89. MELASPILEA Xyl. in Act. Soc. Linn. Bord. ser. 3, i. 

 p. 416 (1856). StictograpJia Mudd Man. p. 226 (1S61), pro parte. 

 (PI. 26.) 



ThaUus thin, sometimes developed below the bark (hypo- 

 phloeodal) or wanting. Algal cells TreniepoMia. Apothecia 

 black and carbonaceous, superficial or immersed, roundish or 

 elongate, simple or shortly branched, with a proper margin 

 only ; disc narrow or flattened ; hypothecium colourless or dark- 

 coloured ; paraphyses slender, free ; asci elongate or narrowly 

 clavate, 8-spored ; spores ellipsoid, fusiform, or ovate, colourless, 

 becoming brown, usually 1-septate. Spermogones with simple 

 sterigmata and straight spermatia. 



1. M. lentigmosa A. Zahlbr. in Engler i Prantl Xat. Pflan- 

 zenf. i. 1*, p. 96 (1903). — ThaUus thin, smooth, cream-coloured, 

 limited by a brownish-black line. Apothecia very small, black, 

 sessile, oblong or linear, slender, straight, simple ; margins tumid, 

 incurved ; disc very narrow : asci clavate ; spores irregularly 

 obovate, unequally 2-celled, pale brown, 0,015-16 mm. long, 

 0,006—7 mm. thick. — Opeffrapha lentiginosa Lyell ex Leight. in 

 Ann. Mag. Xat. Hist. ser. 2, xiii. p. 211, t. 6, f. 16 (1854). 

 CarroU in Joum. Bot. iii. p. 291 (1865) ; Cromb. Lich. Brit, 

 p. 100 ; Leight. Lich. H. p. 372 ; ed. 3, p. 395. Siictographa 

 lentiginosa Mudd Man, p. 226, t. 4, f. 89 (1861). 



The thallus forms somewhat extended patches on the bark ; the 

 apothecia are usually numerous and crowded and grow in all 

 directions. 



Sab. On trees. — Distr. Somewhat local, but plentiful where it 

 occm^ in S. England and S. Ireland. — B. M. Launceston, Cornwall ; 

 iustleigh, Devon; near Brockenhnrst and Lyndhnrst, Xew Forest 

 Hants ; St. Leonard's Forest, Sussex ; Ounraghmore, Waterford ; 

 Glenbower Wood and Castle Martyr, near Cork. 



2. M. lentigiiiosula A. L. Sm. — ThaUus evanescent. Apo- 

 thecia small, black, prominent, elliptical, straight, rarely forked 



