218 GRAPHIDEI [ARTHONIA 



Apothecia small, black, roundish, plane, blackish within ; sporos 

 obovate, colourless, 1-septate, 0,011-16 mm. long, 0,005-6 mm. 

 thick ; hymenial gelatine wine-red with iodine. — Cromb. Lich. 

 Brit. p. 105 ; Leight. Lich. Fl. }). 393 ; ed. 3, p. 416. A . ruderalift 

 Nyl. in Mem. Soc. Sci. Nat. Cheib. iv. p. 100 (1856) ; Carroll in 

 Journ. Bot. iv. p. 24 (1866). A. fusca Hepp Flecht. Eur. n. 534 

 (1860). Lecidca lapidicola Tayl.' in Maekay Fl. Hib. ii. p. 124 

 (1836). 



Exslcc. Leight. ii. 398 (a.s A. fusca). 



Hah. — On calcareous rocks. — Distr. Somewhat rare in upland 

 and mountainous districts of the British Isles. — B. M. Fairlight, 

 Hastings, Sussex ; Cirencester, Gloucestershire ; near Abergavenny, 

 Monmouthshire ; Dolgelly, Merioneth ; Malvern, Worcestershire ; 

 Ben Lawers, Perthshire ; Dunkerron and Cappaghmore Bridge, Kerry. 



Spores ?f-i-seytate. 



23. A. paralia Nyl. in Flora Ix. p. 565 (1877). — Thallus dark- 

 greyish- or reddish-brown, thin, rather smooth. Apothecia 

 dark-brown, roundish, nearly plane ; colourless within ; spores 

 elongate-ovate, subconstricted in the middle, 3-4-septate, 0,018-22 

 mm. long, 0,007 mm. thick ; hymenial gelatine wine-red with 

 iodine. — Cromb. in Grevillea vi. p. Ill ; Leight. Lich. Fl. ed. 3, 

 p. 421. 



Exsicc. Larb. Lich. Hb. n. 113. 



Hab. On maritime rocks. — B. M. Cloghan, Connemara, Galway 

 (the only locality). 



24. A. myriocarpella Nyl. in Ann. Sci. Nat. ser. 4, xx. 

 p. 238 (1863). — Thallus pale-ashy-grey, effuse, thin, subareolate 

 or subpulverulent, sometimes evanescent. Apothecia minute, 

 brownish-black, roundish, plane or convex, blackish within ; 

 spores oblong-ovoid, colourless, 3-septate, 0,010-12 mm. long, 

 0,003-4 mm. thick.— Carroll in Journ. Bot.' iii. p. 292 (1865) ; 

 Cromb. Lich. Brit. p. 104; Leight. Lich. Fl. p. 394; ed. 3, 

 p. 418. Specimen not seen. 



Hah. On mica-schist rocks, collected at Aviemore, Elginshire. 



Parasitic on other Lichens. 



25. A. varians Nyl. Lich. Scand. p. 260 (1861).— Thallus 

 none. Apothecia dull-black, rounded, scattered or confluent, 

 plane or somewhat convex, roughish, internally pale-brown ; 

 spores oblong, usually 3-, sometimes 1- or 2-septate3 colourless, 

 0,012-18 mm. long, 0,006-8 mm. thick; hymenial gelatine 

 usually blue then v/ine-red with iodine. — Cromb. Lich. Brit, 

 p. 104; Leight. Lich. Fl. p. 402; ed. 3, p. 426. A. glaucomaria 

 Nyl. in Mem.. Soc. Sci. Nat. Cherb. iv. p. 98 (1856) ; Leight. in 

 Ann. Mag. Nat. Hist. ser. 2, xviii. p. 330 (1856) ; Carroll in 



