460 113. Urceol. 4.CENOTHALAME.ZE. PL cell, ap/u 
9. Urceolaria tessellata. Chequered pitcher-moss. 
Crust divided into very crowded beds, flattened, running 
together, at last cracked in chequers, rather bald, greyish 
white, those in the middle fertile; proliferous flake rather 
loose, black, with a greyish hoar; thalloid border raised, 
angular, whitish. 
Lichen tesselatus, Engl. Bot. 533. 
Verrucaria tessellata, Hoff lit ; Germ. 185. 
Urceolaria contorta tessellata, F/orke in Berl. Mag. 
Urceolaria tessulata, Achar. Meth. 142. 
Urceolaria cinerea tessulata, Achar . Lich, 337. 
On rocks and brick walls. 
XXIV. 114. LEPIDOMA. Acharius. Lepidome, 
Thallus crustaceous, expanded, adnate, figured, leaflike, 
towlike ; apothecia saucerlike, sessile, entirely covered with 
a cartilaginous membrane, including a similar, rather solid 
parenchyme, centre even, bordered. 
1. Lepidoma candidum. White lepidome. 
Crust nearly tiledlike, white, hoary ; lobes crenate, com- 
plicated, turned back, swollen ; apothecia pressed close, 
black, greenish hoaiy; edge at length waved. 
Psora Candida, Hoffm. Germ. 164. 
Lichen candidus, Weber Germ. 193 ; Engl. Bot. 1138. 
Lecidea Candida, Achar. Meth. 79 ; Lich. 212. 
On rocks and rotten mosses. 
2. Lepidoma vesicular e. Bladdery lepidome. 
Crust nearly tiledlike, brown-black, with a slightish grey 
hoariness ; lobes not cut, folded, reverse-ovate, bullate ; 
apothecia black, naked ; at last hemispherical, not bor- 
dered. 
Lichen caeruleo-nigricans, Light f. Scot. 805; Engl. Bot. 1139. 
Lichen versicularis, Achar. Prod. 94. 
Lichen paradoxus, Ehrh. Crypt. 206 
Patellaria vesicularis, Hoffm. Lich. 32, 3. 
Psora vesicularis, Hoffm. Germ. 163. 
Psora paradoxa, Hoffm. Germ. 163. 
Lichen graniformis, Ehrh. Crypt. 
Lecidea paradoxa, Achar. Meth. 82; Lich. 214. 
Lecidea vesicularis, Achar. Meth. 78 ; Lich. 212. 
On the ground ii-i mountainous places. 
3. Lepidoma luridum. Lurid lepidome . 
Crust tiledlike, greenish brown ; lobes round, crenate, 
paler underneath ; apothecia flat, at last slightly convex, 
black. 
