396 LiCHEXACEr. [lecaxora. 



Hah. Ou trees, old pales, rocks, walls, and tiled roofs in maritime, 

 lowland and upland districts. — Distr. Not uncommon in England and 

 the Channel Islands : apparently rare in X.E. Scotland, E. and N.W. 

 Ireland, thouorh probably often overlooked in both these countries. — B. M. : 

 Noirmont, Island of Jersey ; Chateau Point, Island of Sark ; The Yale, 

 Guernsey. "Yarmouth, and near Brandon, Suffolk ; Epping Forest, E.ssex ; 

 Hurstpierpoint. Sussex : Shankhu, Isle of Wight ; Lyudhm-st, New Forest, 

 Hants ; near Bristol, Somersetshire ; Chailield, Gloucestershire ; near 

 Worcester ; AVeston, Oxfordshire ; near Oswestry, Shropshire ; Barmouth, 

 Aber-tv-Gvu, N. "Wales ; Port Soderick, Isle of Man ; near Newton, 

 Cleveland, Yorkshire ; St. Bees, Cumberland. Portlethen, Kincardine- 

 shire. Portmaronock, near Dublin ; Kylemore and Cleghan, Connemara, 

 CO. Galway. 



Form demissa Stiz. St. Gall. Nat. Ges. 1S22, p. 359.— Thallus 

 thin, leproso-granulose, greenish-brown or pale, often evanescent. 

 Apothecia minute, somewhat prominent, the thalline margin at 

 length obliterated. — Cromb. Grevillea, xviii. p. 46. — Einodina meta- 

 holica fi. demissa Koerb. Sy.st. Lich. Germ. (1885) p. 124. 



Distinguished by the colour of the thallus, and more especially by the 

 minute, emei^sed, at length immargiuate apothecia. In the veiy few 

 British specimens these are numerous and here and there crowded. 



Hah. On rocks in maritime ti'acts. — Distr. Only sparingly in S. Eng- 

 land. — B. M. : Shanldiu and near Luccombe, Isle of "\Vight. 



Yar. /I. lecideoides Cromb. Grevillea, xviii. (1889) p. 46. — 

 Thallus very thin, macular, grepsh-white, usually evanescent. 

 Apothecia small, lecideine, black or blackish, the margin dark- 

 brown, at length obliterated ; spores 0,016-20 mm. long, 0,008-11 

 ram. thick. — Lecanora sopliodes var. hcidioides Xyl. Lich. Scand. 

 (1S61) p. 149 ; Leight. Lich. Fl. p. 225, ed. 3, p. 215 pro minima 

 parte. 



Might readily be taken on a cursoi-y inspection for Lecidea myriocarpa, 

 as observed bv Nvlander /. c, but differs at once in the colour of the 

 margin of the apothecia and in the whitish h^-pothecium. He also sug- 

 gests that it probably descends from Lecanora confragosa, with which it 

 agrees rather than with i. exigua in the size of the spores. The absence, 

 however, of any reaction with K connects it with the present species. 

 The thallus is but little visible in the few British specimens. 



Hah. On old palings in an upland situation. — Distr. Apparently only 

 among the S. Grampians, Scotland. — B. M. : Glen Lochay, KilKn, Perth- 

 shire. 



62. L. suhexigua Nyl. Flora, 1874, p. 30S. — Thallus effuse, 

 subsmooth, unequal, rimose, pale-greyish or sordid-yeUowish (K — , 

 CaCl — ). Apothecia minute, plane, black, the thalline margin 

 thickish, entire ; spores 0,012-15 mm. long, 0,006-7 mm. thick. — 

 Cromb. Grevillea, iii. p. 22 ; Leight. Lich. Fl. ed. 3, p. 220. 



Subsimilar to the preceding species, but differs in the characters of the 



