414 Mr. Hardy on Lichens of the Eastern Borders. 



resembles Mr. Mudd's specimens ; there is also an obvious likeness to L. fusco- 

 rubens of Nylander ; so that till the sporidia are examined, it must remain doubt- 

 ful to which of the two, or any of them, it belongs. The apothecia are small, 

 very numerous, mostly concave, black, but rufescent when moist ; slightly prui- 

 nose, with the margin regular or flexuose ; the crust is very thin, pale greenish 

 grey when moistened. I found a small portion of it on clay, when the apothecia 

 were still more hollow and pruinose. The apothecia of /w^co-rMZiews are more 

 regular, and the disc more frequently umbonate. 



15. L. TENEBROSA, Fw. On mountain and exposed rocks ; of not unfrequent 

 occurrence. N. Summit of Hedgehope, Homilheugh, near the Kettle Well, 

 Wooler, Top of Newton Tor, Spindleston-heugh. B. Bowshiel dean, dean at 

 Oldcambus, Siccar point, foot of Dowlaw dean, rocks on the Whare-burn. 



16. L. INTCMESCENS, Fw. In small olive patches on the thallus of Lecannra 

 glaucoma, which it excavates or destroys. N. On the top of Spindleston-heugh, 

 behind the Cat's Crag ; and on Cheviot above Langleyford Hope. B. Bowshiel 

 dean on a wall top ; near Siccar point ; near the head of Dowlaw dean. 



17. L. AMBIGUA, Ach. On exposed mountain rocks. N. On Cheviot, Hedge- 

 hope, and Fredon hill. B. On rocks on the Whare-burn, in Bowshiel and Dow- 

 law deans, Lumsden shore, Siccar point. Fries, (Lich. Eur. Ref. p. 303, 304,) 

 gives an excellent description of this species under the name of L. varicgata. In 

 some places it appears to be equally common with L. riviilosa, from whose variety 

 Kochiana it requires to be kept separate ; for both species are bounded by rivu- 

 lose hypothalline lines. 



18. L. MELANOPH^A, Fries. L. (Ederi, Bord. Flor. ii. p. 88. On mountain 

 stones and rocks. N. On porphyritic rocks nearly at the summit of Cheviot, and 

 again at the base below Langleyford Hope ; on blue whin boulders near the 

 mouth of Henhole ravine ; on greenstone on Spindleston-heugh and Chesterhill 

 crags ; rocks on Care-burn. B. " On loose stones of greywacke in the west of 

 Berwickshire." Dr. Johnston. Rocks near Lowrey's Knowes, and in the lower 

 part of . Dowlaw dean ; Bowshiel dean ; below the Retreat, and at Edin's Hold ; 

 on Monynut water above Godscroft. 



19. L. PROTRUSA, Fries. On exposed rocks and walls, principally on the sea- 

 coast N. On trap on the coast between Budle and Bamborough. D. On red 

 sandstone at Hudshead. B. On greywacke along all the Berwickshire coast, on 

 rocks exposed to the sea; very fine at Swallow Craig, Siccar point, and Lumsden 

 shore. Inland with a brighter green crust, on walls at Penmanshiel, near Butter- 

 dean, and at Horsley. 



20. L. EXPANSA, Nyl. On stones in moist situations, not common. N. Oc- 

 curs as black botches on stones in the Lill-burn or Three-stone burn, after it 

 leaves the moors, B. On a sandstone boulder in a wet moor at Penmanshiel, and 

 on greywacke in a shady dean on Ewieside. 



21. L. CRUSTULATA, Ach. On exposed rocks, not common. N. On porphyry 

 in Humbleton dean, above the Mill, and on trap at the head of the mill-lead, 

 Coldgate Mill, D. On red sandstone with Biatorina chalyleia at Hudshead. B. 

 On red sandstone at Greenheugh, and small portions on greywacke in a deep 

 ravine in Ewieside. 



22. L. LAPiciDA, Fries. On rocks, and stone-walls, not very abundant. N. 



