BILIMBIa] LECIDEACE/E 141 



associated with minute patches of a bright purple alga, wliich may 

 explain the sometimes pale-violet colour of the hypothecium. 



Hah. On shady calcareous rocks in a maritime district. — B. M^ 

 Kylemore, Connemara, Gal way (the only locality). 



15. B. herbidula A. L. Sm. — Thallus effuse, thinnish, sub- 

 leprose, rimulose or rimulose-diffract, opaque, yellowish-green 

 (K -f- yellowish, CaCl — ). Apothecia minute, plane or somewhat 

 convex, pale-reddish, pale within, the margin thin, darker ; 

 paraphyses not well discrete ; epithecium and hypothecium colour- 

 less ; spores fusiform, 1-3-septate, 0,011-18 mm. long, 0,0025 

 mm. thick ; hy menial gelatine bluish with iodine, — Lecidea 

 herbidula Nyl. in Flora Ix. p. 563 (1877) ; Cromb. in Grevillea 

 vi. p. 112 ; Leight. Lich. Fl. ed. 3, p. 357. 



A doubtful species perhaps referable to B. cuprea. Nylander has 

 described the thallus as having the characters of Gongrosira Kuetz. 

 with subchroolepoid filaments containing numerous large rotundate 

 greenish granules. Our specimen consists of a dense layer of cells of 

 some Palmellaceous alga ; I have been unable to find any apothecia. 



Hah. On a schistose rock in a maritime district. — B. M. Kylemore,. 

 Connemara, Gal way (the only locality). 



16. B. byssoboliza A. L. Sm. — Thallus indeterminate, very 

 thin, continuous, opaque, greenish or greyish-green. Apothecia 

 small, somewhat prominent, yellow-flesh-coloured, concolorous 

 within, the margin paler, at length undulate or scarcely distinct, 

 with a white, pubescent base ; paraphyses slender, discrete ; 

 epithecium and hypothecium colourless ; spores fusiform, 3-5- 

 septate, 0,023-27 mm. long, 0,003-4 mm. thick ; hymenial 

 gelatine pale-bluish then tawny-wine-coloured with iodine. — 

 Lecidea byssoboliza Nyl. in Flora Ixii. p. 206 (1879); Cromb. in 

 Grevillea xxii. p. 58. 



Exsicc. Larb. Lich. Hb. n. 267. 



Readily recognized by the pubescence at the base of the apothecia. 

 The specimen seen is only sparingly fertile. 



Hab. In damp recesses of rocks and walls in a maritime district. — 

 B. M. Killery Bay, Connemara, Galway (the only locality). 



17. B. hemipolioides A. L. Sm.— Thallus effuse, thin or very 

 thin, rugulose, subopaque, greyish-green. Apothecia small, sessile,, 

 convex, immarginate, leaden-coloured or partly pale, colourless 

 within ; paraphyses slender, not well discrete, much branched ; 

 epithecium and hypothecium colourless ; spores fusiform-oblong, 

 usually somewhat curved, 3-septate, 0,012-18 mm. long, 0,0045 

 mm. thick ; hymenial gelatine bluish then, especially the asci, 

 tawny-wine-red with iodine. — Lecidea hemipolioides Nyl. in Flora 

 Ivi. p. 294 (1873); Cromb. in Journ. Bot. xii. p. 148 (1874); 

 Leight. Lich. Fl. ed. 3, p. 356. 



Exsicc. Larb. Lich. Hb. n. 347. 



Hab. On rocks. — B. M. Rozel, Jersey (the only locality). 



