416 Mr, Hardy on Lichens of the Eastern Borders. 



loose boulders before reaching the summit of Cheviot. B. One specimen, wall- 

 top in Bowshiel dean. 



2. B. CORACINA, Hoffm. On exposed rocks and stones, not common. B. 

 On stones in Penmanshiel Moor, and near Dowlaw Moss ; on wall-tops at Pen- 

 manshiel ; on rocks in the dean at Oldcambus ; rocks on Monynut water. 

 This might be easily confounded with RJiizocarpon petroeiim ; the apothecia 

 are mostly innate. 



3. B. ATKATA, Smith. N. On rocks on the Lill»burn, where it first enters 

 the moors. 



We have also among minute states of RMzocarpon jietrceum on stone-walls, at 

 Penmanshiel, a minute lichen, which in some of its appearances I cannot easily 

 distinguish from B. vcrruculosa, Borr. But till I know it better, I cannot ven- 

 ture to place it in the list, lest it turn out to be an extremely dwarf condition of 

 Lecanora polytropa. The fruit appears to be constantly black, even when 

 moistened, but there is this against it, that it is sometimes convex. 



4. B. DisciFORMis, Fries. This was comprehended under the old Lecidea 

 farasema. On bark of trees, but not quite so common as that species, N. and 

 B. On rocks on the Lill-burn. 



5. B. MYRiocAKPA, D. C. N. On trap-rocks on the sea-coast at Bamborough. 

 B. On greywacke at Lumsden shore. 



0. PONCTIFORMIS, Hoffm. Lccidca pinicola, Hook. B. F. ii. 176. B. Rare; 

 on the bark of silver firs, and of alder at the side of the "Whitadder, below the 

 Ketreat ; and on an old fungus growing on an alder there. 



6. B. SCABROSA, Ach. Koerber, Syst. Lich. Germ. p. 227. N. Parasitic on 

 the thallus of Baomyces Byssoides on a wall-top behind the Sneer-hill. B. On 

 the same lichen on a road in Penmanshiel Wood ; and with a thallus of its own 

 on earth in tlie chinks of a wall, Bowshiel dean. Lecidea seabrosa, Hook. B. F. 

 ii. p. 178. This species is not in Mr. Mudd's Manual of British Lichens. 



53. Diplotomma, Fw. 



1. D. ALBOATRUM, Hoffm. I. EPiPOLiuM, AcTi. On rocks, chiefly those 

 containing lime, and on mortar, not common. N. On limestone at Ratcheugh, 

 and on mortar at Bamborough Castle. B. Walls of Cockburnspath Tower; rocks 

 below the " Deil's Dander," Coldingham ; on red sandstone, Greenheugh, &c. 



2. D. CALCAREUM, Wcis. N. Rare ; some imperfect specimens on limestone 

 at Ratcheugh, and on calcareous spar at Humbleton Mill. Lecidea spcirea. 

 Hook. B. F. ii. p. 180. 



54. EMzocarpon, itamond. 



1. R. PETRJEOM, Wulf. Lecidea atro-alla, Hook. B. F. ii. 174, Johnst. Ber. 

 Flor. p. 88 ? On rocks, and stone-walls, common. On stems of heather, Cold- 

 ingham Moor. 



7. CONCENTRICUBI, Davies, Lecidea petrcea, Ber. Flor. ii. p. 87. On stones, 

 common. 



S, CEderi, Ac7i. Rare. N. On sandstone, Whitsunbank hill. B. On a 

 fragment of porphyry on Whare-burn, at the foot of Monynut hill ; on the 

 edges of decayed slate, ravine above Lumsden shore. The yellow tinge of the 

 thallus is communicated by oxide of iron. 



