Rev. T. Salwey^s List of Lichens in Wales. 27 



oetween Aberhamfrac and the cut through the rock by the first 

 milestone. 



Lecidea simplex. Not uncommon : Pont Fadog, &c. 



rivulosa. Very common. 



alho-atra. A very variable lichen. 



Lightfootii. On birch-trees at Rhaidr-Du. 



. pulverea. Cwm Bychan, Hendreforion, Ty Gwyn, Cae Pellaf, 



&c. This is decidedly different from incana. The apothecia are 

 invariably black and of a bright horny substance, which swells re- 

 markably in wet weather. 



incana. In fruit at Crafnant and elsewhere. 



sulphurea. Common. 



expallens. In fruit upon a rock at Gelli Rhud. 



■ coronata. Common. 



pezizoides. Woods at Crafnant. 



cornea. Upon oaks atWyunstay. 



'ferruginea. Common upon stones and trees : a very variable 



plant. 



icmadophila. Very finely and in great abundance on the 



western slope of the Rhinog Vawr. 



microphylla. In fruit at Crafnant, Hendreforion, Cae Pel- 



laf, &c. 



marmorea. Common. 



polytropa. \ Not uncommon upon walls in very high situa- 



intricata. j tions. I am not quite satisfied that these are 



not different states of the same plant. 

 canessens. Common in fruit about Llanaber, Llandewi, &c. ; 



very finely so in the lane leading down from Llandewi church to 

 the sands. 



lucida. Common, but rare in fruit. 



macula. Common about Barmouth. 



fuliginosa. Not uncommon . very fine above Gelli Rhud. 



geomcca. Llyn Howel : very scarce. 



coniops. Aber-Ty-Gwyn. 



stellulata. On stones on the shore at Barmouth, and upon a 



wall inside the sand-banks. 

 Salweii. Common on the hills about Barmouth, but rare in 



fruit : in fruit at Gelli RhM, Drws-y-nant, and on the Breiddin 

 hills, Montgomeryshire. 



Lecanora exigua. Aber-Ty-Gwyn. 



cuarctata. A lichen, which my friend Mr. Borrer has referred 



to this, grows upon a rock below the Harlech turnpike at Bar- 

 mouth, and upon the wall between Borthwen and Aberhamfrac. 

 The shields, which are about the size of those of atra or glaucoma, 

 are, both in a wet and dry state, of a pale diluted red without any 

 border. In wet weather they attract the eye at some distance. I 

 should be inclined to consider this plant at least, if not the normal 

 state of coarctata, as a Lecidea. It is so remarkably unlike any 

 other state of coarctata, that, familiar as I am with the Protaean 

 character of many of the Lichens, I confess that I can scarcely 



