bacidia] lbcidbacb« 161 



p. 372. L. suhincompta subsp. orihata Cromb. in Grevillea ii. 

 p. 141 (1874) & xxii. p. 59. Specimen not seen. 



Apparently, as Nylander himself says, only a subspecies differing 

 chiefly in the more developed thallus and the rather smaller spores. 



Hab. On the gromid among schistose rocks in a mountainous 

 region. Collected by Dr. Stirton on Ben Lawers, Perthshire. 



23. B. circumpallens A. L. Sm. — Thallus effuse, thin, rimose, 

 pale-greyish. Apothecia small, plane or subconvex, brownish- 

 black or brownish-red, the margin pale, at length excluded, 

 within colourless ; paraphyses thickish, somewhat lax ; epithecium 

 vaguely dark or almost colourless ; hypothecium colourless ; spores 

 fusiform or fusLform-acicular, straight, 3-septate, 0,018-25 mm. 

 long, 0,0020-35 mm. thick ; hymenial gelatine pale-bluish then 

 wine-red with iodine. — Lecidea circumpallens Nyl. in Flora xlix. 

 p. 370 (1866) ; Carroll in Journ. Bot. v. p. 255 (1867) ; Leight. 

 Lich. Fl. p. 336 ; ed. 3, p. 358. L. hacillifera var. circumpallens 

 Cromb. Lich. Brit. p. 74 (1870) ; subsp. circumpallens Cromb. in 

 Grevillea xxii. p. 58 (1893). 



Hall. On clayey soil. — Distr. Bare in W. Ireland. — B. M. Boss 

 and Kilkee, Clare. 



24. B. atrogrisea Arnold in Flora xli. p. 505 (1858). — • 

 Thallus determinate or subeffuse, thin, rimulose or granulose, 

 greyish- white or greenish-grey. Apothecia sessile, or adnate, 

 at first plane with thick, smooth margin, at length somewhat 

 convex, the margin excluded, black or purplish-black, within 

 white or whitish ; paraphyses slender, subdiscrete, clavate and 

 blackish at the apices ; epithecium infuscate (K + purplish- 

 violet) ; hypothecium colourless ; spores elongate-acicular, 3-1 5- 

 septate, straight or slightly curved, 0,040-70 mm. long, 0,003-5 

 mm. thick ; hymenial gelatine bluish then sordid wine-red with 

 iodine. — Mudd Man. p. 183. Biatora atrogrisea Delise ex Hepp 

 Flecht. Eur. n. 26 (1853). Lecidea luteola f. endoleuca Nyl. Bot. 

 Not. 1853, p. 98; var. endoleuca Nyl. in Act. Soc. Linn. Bord. 

 ser. 3, i. 1856 p. 360. L. endoleuca Nyl. ex Carroll in Nat. 

 Hist. Rev. 1859, p. 527; Cromb. Lich. Brit. p. 74; Leight. 

 Lich. Fl. p. 340 ; ed. 3, p. 367. 



Exsiec. Carroll Lich. Hib. n. 23 ; Leight. n. 90 (as Biatora 

 premnea) ; Larb. Lich. Hb. n. 349 ; Johns, n. 341. 



Sab. On naked or mossy trunks of trees, rarely on stems of ivy, 

 in maritime and upland situations. — Distr. Here and there in 

 England, apparently rare in Scotland, more frequent in Ireland. — 

 B. M. Kelvedon, Ulting and Hockley, Essex ; near Lewes, Selham, 

 Moimt Harry and near Hastings, Sussex; near Lyndhurst, New 

 Forest, Hants ; Ilsham Walk, Torquay, Devon ; Withiel, Cornwall ; 

 Bathampton Downs, Somerset; Oakley Park, Cirencester, Gloucester- 

 shire; Twycross, Leicestershire; HoUybush Hill, Malvern, Wor- 

 cestershire ; Nannau and Dolgelly, Merioneth ; near Shrewsbury, 

 Shropshire; Airyholme Wood, Cleveland, Yorkshire; Barcaldine, 



