Verrucaria.] LICHENES. 91 



On limestone, near Killarney ; Sir T. Gage. This is given in the 

 words and on the authority of Mr- Borrer. I have never seen it. 



16. V. elceina, Borr. Thallus thin, investing, tartareous, 

 somewhat cracked about the apothecia, smooth, slightly tumid 

 about the bases of the apothecia, very slightly greenish-grey 

 when dry, greenish -olive when moist, with a thin, pale, cream- 

 coloured border ; apothecia small, nearly immersed, black, sub- 

 hemispherical, with a wide pore. Borr. under Eng. Bot. t. 2623, 



/ 2. Eng. Bot. t. 2455. 



Near Belfast, Mr. Templeton ; near Bantry, Miss Hutchins ; at 

 Black water Bridge, County of Kerry. The change of colour by ap- 

 plication of moisture is very remarkable. It often forms patches of a 

 foot in breadth, the thallus closely investing the stone. 



17. V. Irnvata, Ach. Thallus thin, tartareous, cracked, even, 

 dusky grey or brownish, with a thin black substratum ; apo- 

 thecia small, partially emerging, subhemispherical, irregular, 

 rough, black. Ach. Lich. Un. p. 284. Eng. Bot. Supp. t. 2628, 

 /•2. 



On siliceous rocks ; common in the County of Kerry. It is the first 

 lichen that plant-? itself on the clean newly fractured surfaces of the 

 siliceous rocks in the County of Kerry. It varies much in the colour 

 of the thallus. This is minutely cracked ; the cracks black. The 

 apothecia have their bases partially covered with the elevated thallus ; 

 they are irregular in shape, with or without a pore, conical or flattened, 

 sometimes imparting a black tinge to the thallus in contact, and are 

 somewhat rough on the surface. 



18. V. plumbea, Ach. Thallus tartareous, minutely cracked, 

 uneven, lead coloured, with rather a swollen border, edged with 

 black ; apothecia immersed, globose, black. Ach. Lich. Un. p. 

 285. Eng. Bot. t. 2540. (the apothecia too large.) 



On limestone, near Belfast ; Mr. Templeton. Dunkerron, Kerry. 

 The perithecium passes under the pale nucleus. It is sometimes 

 brownish or mouse-coloured. The apothecia are papillated or porous 

 on their tops, which emerge usually but little out of the thallus. 



19. V. viridula, Ach. Thallus rimoso-areolate, uneven, of a 

 dusky green ; apothecia half-immersed, black, rather smooth, 

 subglobose, with a pore on the summit, of a middle size. Ach. 

 Lich. Un. p. 675. 



On sandstone, near Belfast, Mr. Templeton. It does not appear 

 that any good figure of this species has been yet given, and never hav- 

 ing seen an authentic specimen, I think some doubts may be enter- 

 tained whether Mr. Templeton's plant above defined, should be re- 

 ferred to the Acharian, from the character of whose apothecia it re- 

 cedes in having the emerging part convex not conical. 



20. V. muralis, Ach. Thallus indeterminate, thin, scattered, 

 between leprous and tartareous, pale grey ; apothecia promi- 

 nent, subglobose, rough, umbilicated. Ach. Lich. Un. p. 288. 

 Borr. in Eng. Bot. Supp. t. 2647, /. 2. 



