120 LICHENES. [Lecuka. 



whitish, filmy, less granulated, and moie extensive thallus — as well as 

 the scattered apothecia, with their disk rougher, and, when wet, brown- 

 ish-black, not glancescent — distinguish this from the preceding ; in- 

 deed, it seems far more nearly allied to L. premnea, whose thallus, 

 however, is thicker, tartareous, minutely and more decidedly wrinkled, of 

 a greenish hue, whose border is white and fibrous ; and the apothecia 

 usually larger. Beneath a dark brown disk, dissection shows a dusky 

 or brownish semi-transparent lamina proligera, with some scattered, 

 but nearly parallel and vertical opaque dark strice, resting on much 

 brownish matter. 



1G. L. pinicola, Hook. Thallus very thin, diffuse, filmy or 

 subtartareous, whitish; apothecia very minute, numerous, evenly 

 scattered, brownish-black, flattish, at length convex, and the 

 border obliterated. Eng. Flor. vol. 5, p. 176. Eng. Bot. t. 

 1851. 



On bark of firs ; near Belfast, Mr. Templeton. Woods at Turk 

 mountain, near Killarney, where it occurs also on oak. 



17. L. dubia, Hooker. Thallus thin, subtartareous, granu- 

 lated, filmy, brownish-grey ; the border pale ; apothecia im- 

 mersed, clustered, brownish-black, at length convex, and their 

 border obliterated. Hook. Eng. Fl. v. 5, p. 176. Eng. Bot. t. 

 2347. 



On paling ; near Belfast, Mr. Templeton. On paling at Derriquin, 

 County of Kerry ; and on a barn window at Feltrim hill, near Dublin. 

 Our plant has the strongest analogy with L. elceochroma : the appear- 

 ances on dissection of the apothecia are quite the same. 



18. L. Griffithii, Hook. Thallus thin, subtartareous, minutely 

 granulated and wrinkled, cracked, not limited, of a brownish- 

 ash colour; apothecia sessile, scattered, purplish-black, at length 

 convex ; the lamina proligera thick, pale, brownish-white. 

 Hook. Eng. Flor. v. 5, p. 177. Eng. Bot. t. 1735. Lee. enter o- 

 leuca, Ach. L. Un. p. 177. 



On old oaks, near Belfast, Mr. Templeton : on furze, Dunkerron. 

 The thallus does not appear to be limited. The tops of the young 

 apothecia sprinkled, as rough black minute specks, over the thallus, 

 each contain under them a lamina proligera. This, in the full grown 

 tubercles, under an opaque dark brown disk, is a thick, brownish, 

 striated, semi-transparent layer, resting on a thin stratum of somewhat 

 an opaquer brown. 



19. L. Gagei, Hook. " Thallus dispersed, minutely granu- 

 lated, somewhat fibrous, bibulous, of a tawny olive; apothecia 

 minute, blackish-brown, with a paler border of their own sub- 

 stance, finally convex, and deprived of their border." Smith. 

 Hooker, Eng Flor. v. 5, p. 177. Eng. Bot. t. 2581. 



On a rock called O'Donoghue's Prison, at Killarney, Sir T. Gage. 

 I have never seen a specimen of this : the English Botany figure does 

 not appear to be very different from that of L. synoihea, t. 1711, of 

 the same work. 



20. L. sanguinaria, Ach. Thallus tartareous, coarsely gra- 



