Porina.} LICHENES. 101 



as in the rest of the genus, but more of the proportionate size of that 

 of a Verrucaria, under which, perhaps, this species may as well be 

 arranged as under Endocarpon. The patches are sometimes a foot or 

 more in diameter. 



8. E. pulchellum HOOK. Thallus of foliaceous, thin, smooth, 

 greenish-grey, lobed scales, the lobes rounded, with elevated, 

 incurved edges, at length sprinkled with granular buds; the 

 under side pale brown, fibrous ; apothecia globular, immersed, 

 their summits prominent, black, with a central pore. Hooker 

 Eng. Flor. v. 5, p. 158. JBorr. in Eng. Bot. Supp. t. 2602, /. 1 . 



On the bark of trees, on mosses, more rarely on rocks ; very com- 

 mon in the South of Ireland. Mr, Templeton detected it near Bel- 

 fast in 1806. As the involute rim of the lhallus unfolds, it leaves 

 concentric marks on the scales ; these are seldom more than the tenth 

 of an inch in diameter ; they often bear greenish granular clusters of 

 buds, are sometimes imbricated, and slightly greenish white, when wet 

 of a glaucous green. When moist the tops of the apothecia appear as 

 semiglobose, black prominences ; on dissection the nucleus is found to 

 be covered by a black perithecium enclosing it altogether : within this 

 is a pale tegument containing the colourless gelatinous nucleus, in 

 which are seen numerous cylindrical bodies at the periphery, pointing 

 to, but not reaching the centre. It is frequently found with apothecia 

 in woods and on mosses in the mountains. 



9. E. l&fe-virens, HOOK. Thallus of foliaceous, thin, smooth, 

 roundish, light green scales, with shallow, rounded lobes be- 

 neath; free, elevated, and naked at the edges, fibrous at the 

 centre, white. Hook. Eng. Flor, v. 5, p. 158. Borr. in Eng. 

 Bot. Supp. t. 2658, under Vermcaria. 



On turf, near Belfast, Mr. Templeton : near Bantry, Miss Hut- 

 chins. On Carig' Mountain, County of Kerry. The young thallus is 

 in concave cups, with white eHges, placed side by side and in contact ; 

 their edges entire ; of the older, lobed. No apothecia have been ob- 

 served. 



10. l&.fuscellum, ACH. Thallus of minute, adpressed, close- 

 ly set, angular, slightly-brownish-grey scales, on a black, thick, 

 cracked substratum ; apothecia very minute, their orifice dark 

 brown, flat, slightly prominent. Ach. Lick. Un. p. 675. Eng. 

 Bot.t. 1500. 



On the mortar of old Dunkerron Castle, County of Kerry. The 

 edges of the scales are nearly black, truly elevated, and hence, even in 

 the moistened state, the scales are concave. The nucleus of the apo- 

 thecia is pale or very slightly brownish, gelatinous, and semitransparent 

 when wet. 



15. PORINA, Ach. 



Thallus cartilagineo-membranaceous, uniform. Apothecia ver- 

 ruciform, formed of the thallus, usually many -celled, each 

 cell containing a nucleus, and opening by a coloured, often 

 distorted perforation above. 



