LECIDEA] LECIDEACEiE 93 



165. L. mullensis Stirton in Scott. Nat. iv. p. 166 (1877).— 

 Thallus dark or blackish-grey, areolate-warted, cracked, formed 

 of erect coluraellse, either connate or dispersed (K + yellow, 

 medulla + yellow then ferruginous-red). Apothecia black, sub- 

 innate, small, plane, acutely margined, the margin often flexuose 

 or undulate ; hypothecium thickish, brown or brownish-black ; 

 paraphyses irregular, indistinct, black at the apices ; spores 

 ellipsoid, 0,006-9 mm. long, 0,004-6 mm. thick ; hy menial gela- 

 tine bluish then wine-red with iodine. — Leight. Lich. Fl. ed. 3, 

 p. 288. Specimen not seen. 



Hob. On rocks. Collected by Dr. Stirton on rocks in Island of 

 Mull. 



166. L. orphnaeilla Stirton in Scott. Nat. iv. p. 166 (1877).— 

 Thallus black, opaque, minutely granular-furfuraceous, con- 

 tinuous. Apothecia black, sessile, plane or somewhat convex, 

 with a shining, irregularly lobate margin ; hypothecium colour- 

 less ; paraphyses rather stout, generally conglutinate ; the epi- 

 thecium thick and black ; spores oblong or fusiform-oblong, 

 0,013-18 mm. long, 0,003-4 mm. thick ; hymenial gelatine in- 

 tensely blue with iodine. — Leight. Lich. Fl. ed. 3, p. 254. 

 Specimen not seen. 



Hah. On rocks. Collected by Dr. Stirton in Island of Mull. 



167. L. phyllodisca Stirton in Trans. Glasgow Soc. Nat. 

 1875, p. 86. — Thallus black, thin, scurfy or scarcely visible. 

 Apothecia black, often 2-3 aggregate or conglomerate and then 

 undulate, the margin thin, flexuose, shining dark-grey or dark- 

 bluish-grey within (K -}- purpurescent or rosy) ; hypothecium 

 blackish or darkly zonate ; paraphyses distinct, clavate, and 

 black or bluish-black at the apices; spores ellipsoid, 0,007-9 mm. 

 long, 0,0045-55 mm. thick ; hymenial gelatine slightly blue then 

 wine-yellow or violet with iodine. — Leight. Lich. Fl. ed. 3, p. 353, 

 Specimen not seen. 



Hah. On rocks, rare. Collected by Dr. Stirton near Killiecrankie, 

 Perthshire. 



168. L. callista Stirton in Grevillea iii. p. 34 (1874).— Thallus 

 dark-brownish-black, granular, the granules dispersed or con- 

 glomerate. Apothecia black, small, bluish-grey pruinose, sessile, 

 crowded, often contiguous, the margin prominent, inflexed ; hypo- 

 thecium brownish-black, thin ; paraphyses rather indistinct, 

 thickish, clavate, and brown at the apices ; spores ellipsoid or 

 cylindrical, small, 0,012-14 mm. long, 0,003 mm. thick ; hy- 

 menial gelatine intensely blue almost black with iodine. — Leight. 

 Lich. Fl. ed. 3, p. 276. Specimen not seen. 



Hah. On rocks. Collected by Dr. Stirton near Grantown, Inver- 

 nessshire. 



