PL.cell.aph, 5. IDIOTHALAMEiE. 129. Lithocia. 49? 
VIII. 129. LITHOCIA. Acharius. Stone-moss . 
Th alius crustlike, nearly tartarlike, unbroken, cracked 
in beds, or powdery, flat, expanded, adnate, uniform ; apo - 
thecia with a nearly globular hemispherical thalamium, in- 
nate at bottom in the thallus ; perithecium double, the ex- 
terior nearly cartilaginous, thick, black, halved above, with 
a nipple or mouth; the interior very thin, membranaceous; 
enclosing all around a nearly globular, vesicular, cellular 
nucleus. 
1. Lithocia Schraderi. Schrader* s stone-moss. 
Crust tartarlike, unbroken, whitish ; opothecia small, 
crowded, sunk, nearly globular; inside dirty-white, trans- 
parent. 
Lichen Schraderi, Achar. Prod. 13; Engl . Bot. 1711. 
Lichen immersus, Hoffm. Lich. 24. 
Verrucaria immersa, Persoon in Uster. Ann. 7. 
Verrucaria rupestris, Schrader Germ, 109. 
Yerrucaria Schraderi, Achar. Meth. 114; Lich. 284. 
On limestone and chalk. 
2. Lithocia Harrimanni.. Harrimann’s stone-moss. 
Crust tartarlike, unbroken, distinctly limited, very thin, 
slightly pitted, mouse-colour ; apothecia minute, nearly 
globular, sunk, nipple conical ; inside dirty white. 
Verrucaria Harrimanni, Achar. Lich. 284; Engl. Bot. 2539. 
On hard grey limestone rocks. 
3. Lithocia plumhea. Lead- grey stone-moss. 
Crust tartarlike, scarcely broken, regular, very finely 
cracked, rather wrinkly, lead-colour ; apothecia nearly glo- 
bular, innate, become depressed above, saucershape; in- 
side white. 
Verrucaria plutnbea, Achar. Lich. 285. 
Lichen plumbosus, Engl. Bot. 2540. 
On limestone-rocks. 
4. Lithocia glaucina. Greenish stone-moss. 
Crust cracked in beds, greenish-brown ; apothecia half- 
sunk, prominent part hemispherical, afterwards pierced; in- 
side dirty white, transparent. 
Verrucaria glaucina, Achar. Syn. 94. 
On the hardest stones. 
VOL. i. 
2 K. 
