416 lichexacei. [lecattoka. 



Staveley, Westmoreland ; Alston, Cumberland. Dalmahoy Hill, near 

 Edinburgh; Appin, Argyleshire ; The Trossacbs, Perthshire ; Baldovan, 

 Forfarshire ; near Portlethen, Ivincardineshire. Lambay Island, co. 

 Cork. 



Form pulicaris Xyl. ex Cromb. Grevillea, xviii. (1890) p. 6S. — 

 Thallus vei'v thin or obsolete, whitish. Apothecia small, plane, at 

 length convex : the thalline maruin thin, entire, whitish. — Lecaaora 

 pulicaris Ac-h. Syn. ( 1S14) p. 336. Patellaria pulicaris Pers. Act. 

 "Wetteraw. ii. (1 ^IM;, fide Ach. I. c. 



The few British specimens are entirely ecrustaceous, and are limited 

 throughout by black hypothiilline(r) lines. The apothecia are numerous, 

 though not crowded. 



ITab. On old fir palings in upland mountainous districts. — Distr. Very 

 local among the Grampians, Scotland. — B. M. : Blair Athole, Perthshire; 

 Crathie, Braemar, Aberdeen.shire. 



94. L. gangaleoides Xyl. Flora, 1S72, p. 3-54. — Thallus sub- 

 determinate, verrucoso-areolate, greyish-white (K + yellow, CaCT — ). 

 Apothecia moderate, sessile, plane, crowded, black ; the thalline 

 margin thin, entire ; piraphyses moderate, epithecium not inspersed ; 

 spores 0,012-15 mm. long, 0,'>'»7-8 mm. thick ; hyraenial gelatine 

 bluish, the thecte at length wine-coloured with iodine. — Cromb. 

 Journ. Bot. 1876, p. 360 ; Leight. Lich. Fl. ed. 3, p. 189.— X. sub- 

 fusca forma gangalta (noa Ach.) Leight. Lich. Fl. p. 202, ed. 3, 

 p. 187, may be this pro parte. — Brit. Exs. : Larb. Lich. Hb. n. 19. 



Like the preceding apt to be confounded with L. afra, from which it 

 is distinguished by the internal colour of the apothecia and by the arcuate 

 spermatia. From L. coilocarpa, which it more closely approaches, it differs 

 chiedy in the darker apothecia and the thicker paraphyses. Its 

 nearest aUy is L. atrynea, of which Xylander /. c. says it may probably 

 be a variety distinguished by the colour of the apothecia and 

 the reaction of the hymenial gelatine. The apothecia are often crowded, 

 with the thalline margin occasionally shghtly inflexed. The spermogonea 

 are frequent, with spermatia 0,020-30 mm. long, 0,0005 mm. thick. 



Hah. On rocks and walls in hilly and mountainous regions. — Distr. 

 Seen onlv from a few localities in X. England, the Scottish Highlands, 

 and ^s."\V. Ireland — B. M. : X. Derbyshire ; Bearmoor, Xorthumberland ; 

 Llanbedrog, Carnarvonshire : Wastdale, Cumberland. Achosragan Hill, 

 AppLn, Argyleshire ; Craig Tulloch, Blair Athole, Perthshire. Letter 

 Hill and Ballinakill, Con;iemara, co. Galway. 



Subsp. L. scMstina Xyl. Flora, 1872, p. 429. — Thallus deter- 

 minate, continuous, smooth, rugulose, areolato-rimose, glaucous- 

 white. Apothecia moderate or somewhat large, black, opaque ; the 

 thalline margin at length flexuose, white; spores 0,011-14 mm. 

 long, 0,006-8 mm. thick. — Cromb. GreviUea, xviii. p. Q^. — L. 

 schistina Cromb. Journ. Bot. 1182, p. 274. 



Differs from the type more especially in the smoother deplanate thallua 



