,S38 PYRKNOCAUPEI j I'OUINA 



1:2. p. leptospora A. L. Sm. Thallus very thin, brown. 

 Porithecia niinuto, black, lioniisphcrical, tlie base imniorsed ; the 

 ostiole a niinuto pajiiUa ; pcrithecial wall entire, or thin under 

 the base ; paraphyses scanty, distinct ; asci cylindrical, sli«j;htly 

 narrower upwards, about 0,090 mm. long, 0,010-12 mm. thick; 

 spores 8 in the ascus, colourless, elongate-fusiform, 8- or more- 

 septate, 0,045-55 mm. long, 0,003-4 mm. thick. — Verrucaria 

 leptospora Nyl. in Flora xlvii. p. 487 (1864) & li. p. 164 (1868) ; 

 Carroll in Journ. Bot. vi. p. 101 (18G8) ; Cromb. Lich. Brit, 

 p. 117 ; Leight. Lich. Fl. p. 452 ; ed. 3, p. 484. 



Outwardly very similar to P. olivacca, but differing in the 

 character of the spores. 



Hab. On bark of holly. — B. M. Dinish, Killamey, Kerry. 



13. P. furvescens A. L. Sm. — Thallus brown or olivaceous- 

 )>rown, granulate, unequal, thin, effuse not continuous. Perithecia 

 black, moderate in size, innate, the conical ostiole projecting ; 

 perithecial wall entire ; paraphyses slender, crowded ; spores 8 

 in the ascus, colourless, fusiform, 3-5-septate, 0,031-33 mm. long, 

 0,006 mm. thick. — Vei-rucaria furvescens Nyl. in Flora xlvii. 

 p. 356 (1864); Carroll in Journ. Bot. iii. p. 293 (1865); Cromb. 

 Lich. Brit. p. 117; Leight. Lich. Fl. p. 450; ed. 3, p. 481. 



Considered by Nylander to be nearly allied to P. chlorotica. The 

 single specimen in the herbarium is too meagre for examination ; 

 Carroll {I. c.) states that in the specimens examined by him the spores 

 are only 8 -septate. 



Hah. On the ground on mosses.— P. M. Summit of Ben Lawers, 

 Perthshire (the only localit}"). 



14. P. insiliens A. L. Sm. — Thallus dirty -brownish-white, 

 thickish, tartareous, deeply cracked, subfurfuraceous. Perithecia 

 large, imbedded in rather large hemispherical thalline tubercles, 

 the ostiole papillate, emerging ; perithecial wall blackish-brown, 

 dimidiate, the inner wall pale -brown; paraphyses slender, distinct ; 

 spores 8 in the ascus, broadly fusiform, obtuse at the apices, 

 5-7-septate, 0,050-67 mm. long, 0,011-14 mm. thick; hymenial 

 arelatine colourless with iodine. — Verrucaria insiliens Larb. ex 

 Nyl. in Flora Ix. p. 566 (1877); Cromb. in Grevillea vi. p. 114 ; 

 Leight. Lich. Fl. ed. 3, p. 484. Specimen not seen. 



Hah. In deep recesses of caves, Twelve Pins, Connemara, Galway 

 (the only locality). 



15. P. Curnowii A. L. Sm. in Journ. Bot. xlix, p. 44, 

 t. 510, f. 9 (1911). — Thallus olivaceous-brown, tartareous, 

 thin, unequal, continuous or cracked. Perithecia scattered, 

 black, small, hemispherical, immersed at the base, the ostiole a 

 minute papilla, scarcely visible ; perithecial wall dimidiate ; para- 

 physes numerous, slender; asci cylindrical-clavate, 0,080 mm. 

 long, 0,007- 8 nnn. thick ; spores 8 in the ascus, narrowly fusi- 

 form, 7- or more- septate, about 0,052 mm. long, 0,003 mm. thick. 



