LECANORA.] LECANO-LEC1DEEI. 377 



Ireland ; not seen from the Channel Islands. B. M. : Hastings, Sussex ; 

 Kingsbridge, S. Devon ; near Penzance, Cornwall ; Malvern, Worcester- 

 shire ; Croesfaen, near Monmouth; Aberdovey, Merionethshire; Llan- 

 dyssil, Cardiganshire ; South Stacks, Holyhead Alt., Anglesea ; near Rose- 

 berry, Cleveland, Yorkshire ; Eglestoae and Teesdale, Durham ; White- 

 haven, Cumberland ; Chollerford, Northumberland. Barcaldine aud Head 

 of Loch Awe, Arjryleshire ; The Trossachs, Perthshire ; Lundie Craigs, 

 Forfarshire ; Porfletb.cn, Kincardineshire ; The Khoil, near Ballater, 

 Aberdeenshire. Near luniscarra, co. Cork; Kilkee, co. Clare; near 

 Kylemore, co. Galway. 



34. L. ferruginascens Xyl. Flora, 1872, p. 427. Thallus effuse, 

 thin, areolato-difi'ract, whitish (K + purplish), often evanescent. 

 Apothecia small, biatorine, plane and margined, or at length convex 

 and immarginate, rusty-ochraceous or tawny-fcrrugineous (K + 

 purple) ; spores obloug, polari-bilocular, with longitudinal tube, 

 0,011-16 mm. long, 0,004-6 mm. thick. Cromb. Grevillea, xviii. 

 p. 45. 



Allied to var. ft of the preceding species, but differs in the colour of 

 the apotliecia and in the spores, which, as observed by Nylaiider /. c., 

 often appear simple in the recent plant. In the British specimen seen 

 the apothecia become at length rather dark. 



Hub. On schistose rocks in an upland situation. Distr. As yet only 

 very sparingly in N.W. England. B. M. : Near Kendal, Westmoreland. 



35. L. fuscoatra Xyl. Flora, 1872, p. 427. Thallus effuse, 

 thin, minutely areolato-diffract, sordid-greyish (K -f purplish-violet). 

 Apothecia small, nearly plane, lecanorine, rusty-red (K + purplish), 

 the thalline margin distinct, entire; spores polari-bilocular, 0,011 

 15 mm. long, 0,006-9 mm. thick. Cromb. Grevillea, xviii. p. 45. 

 Lecanora ferruginea var. fuscoatra Cromb, Lich. Brit. p. 47 ; 

 Leight. Lich. Fl. p. 220, ed. 3, p. 209. Biatora ferruginea . fusco- 

 atra Bayrh. Uebers. (1849) p. 82. 



Apparently specifically distinct from L. ferruginea, differing at once in 

 the definitely lecanorine' apothecia. Our few British specimens are well 

 fertile. 



Hob. On schistose rocks in maritime districts. Distr. Only very 

 sparingly in N.W. England, the S.W. Highlands, and N.E. coast of 

 Scotland. B. M. : North of Douglas, Isle of Man. Barcaldiiie, Argyle- 

 shire ; Portlethen, Kincardineshire. 



36. L. concilians Nyl. Flora, 1880, p. 388. Thallus subdeter- 

 minate, granuloso-areolate, dark-greyish (K ). Apothecia moderate 

 or small, rusty-brown or brownish-black, at first lecanorine, plane, 

 with thin thalline margin, at length convex, biatorine, immarginate 

 (K + dark purplish) ; spores ellipsoid, polari-bilocular, 0,012-17 mm. 

 long, 0,006-9 mm. thick. Cromb. Grevillea, xviii. p. 45. Lecanora 

 ferruginea forma concilians "Nyl. Lich. Scand. (1861) p. 143; Cromb. 

 Journ. Bot. 1870, p. 97 ; Leight. Lich. Fl. p. 220, ed. 3, p. 209 

 (obs.). To this is referable the British specimens of L. dijihyodes 



