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XXVI. Deferiptions of Four New Britifh Lichens, By the Reverend 
Hugh Davits FS 
Read Feb, 5, 179 3 
I. LICHEN PILULARIS. Tas. 28, E A. 
L. cruftaceus cinereo-albidus, tuberculis pilulæformibus nigris, 
Pill Lichen. 
Species unknown to every author I have feen. In examin- 
ing it attentively, I find fome of the younger fru&tifications 
perfect fcutelle, with elevated margins of the fame colour; thefe 
are but few, and feem foon to lofe that form. The fruétification 
in decay changes into different fhades of brown. | 
Found in Bodowen-park, Anglefea. 
2. L. SIMPLEX. TAB. 28. f. 2. 
L. ecruftaceus, tuberculis difformibus plicato-rugofis atris. 
Simple Lichen. 
THIS, hitherto undefcribed, fpecies has no ground, but confifts 
of bare, fmall tubercles, which, examined with a microfcope, ap- 
pear wrinkled, and of various irregular forms. It feems to affect 
growing upon a kind of grey flate, which it covers to the extent of 
- 
many inches together. gie —— < 
o ince 
