50 LECANO-LECIDEKI [lEGIDEA 



often confluent, innate-sessile, plane then convex, the thin 

 smooth entire margin eventually obliterated ; hypothecium 

 reddish-brown ; paraphyses loosely coherent, blackish-green at 

 the tips ; spores oblong-ellipsoid, 0, 011-14 mm. long, 0,007-8 mm. 

 thick ; hymenial gelatine blue with iodine. — Mudd Man. p. 207 ; 

 Leight. Lich. Fl. p. 271 ; ed. 3, p. 270. L. scahra Tayl. in 

 Mackay Fl. Hib. ii. p. 121 (1836). L. enferocfdora Tayl. ex 

 Leight. Lich. PI. 271 ; ed. 3, p. 271. 



JSxsicc. Leight. n. 299 ; Larb. Lich. Hb. n. 67 ; Johns, n. 378. 



Hab. On rocks and stones in maritime and upland districts. — 

 Distr. Rather frequent in England and Wales, rare in the Channel 

 Islands, Scotland and S.W. Ireland. — B. M. Trinity, Jersey ; near 

 Penzance, Cornwall ; Whitesand Bay ; East Lyn and Torquay, 

 Devon ; Boro' Green, Kent ; Barmouth, Merioneth ; Pwlheli, Car- 

 narvonshire ; Ayton and Langbaurghrigg, Cleveland, Yorkshire ; near 

 Rigg, Kincardineshire ; Derriquin, Kerry ; Ballinakill and Cloghan, 

 Connemara, Galway ; Cliffs of Moher, Clare. 



Form meiococca A. L. Sm. — Thallus similar to the type. 

 Apothecia paler, somewhat reddish-brown ; paraphyses distinct, 

 colourless at the tips. — Lecidea meiococca Leight. Lich. Fl. ed. 3, 

 p. 277 (1879). L. scabra f. meiococca Nyl. in Flora lix. p. 578 

 (1876). 



Exsicc. Larb. Lich. Hb., without number. 



Hab. On maritime rocks. — Distr. Rare in N.E. Scotland and N.W. 

 Ireland. — B. M. Nigg, Kincardineshire ; Lettermore and Ballinakill 

 Bay, Connemara, Galway. 



Var. subviridans A. L. Sm. — Thallus sulphur-yellow, thin, 

 sometimes scattered, sorediate. — L. continuior var. subviridans 

 Nyl. in Flora xl. p. 463 (1877) ; Cromb. in Grevillea vi. p. 13 ; 

 Leight. Lich. Fl. ed. 3, p. 278. 



Nylander described the variety on specimens sent by Larbalestier ; 

 two specimens from Larbalestier in the British Museum differ from 

 L. protrusa only in the more brightly coloured and more sorediate 

 thallus. 



Hab. On walls. — B. M. Lough Feagh, Connemara, Galway (the 

 only locality). 



78. L. dubia Hook, in Sm. Engl. Flora v. p. 176 (1833).— 

 Thallus effuse, subleprose, pale-greenish, extremely pulveru- 

 lent or almost smooth and minutely areolate (K + yellow, 

 CaCl -f orange-red). Apothecia black, usually numerous, 

 scattered or confluent, subsessile, plane, becoming convex and 

 immarginate, the disc smooth or granular ; hypothecium some- 

 what brownish ; paraphyses distinct, bluish-green at the apices, 

 the colour extending downwards; spores oblong, 0,014 mm. long, 

 0,007 mm. thick ; hymenial gelatine deep-blue with iodine. — 

 Tayl. in Mackay Fl. Hib. ii. p. 120 (1836); Leight. Lich. Fl. 



