LECANTA | LECANORACEX 341 
Var. Cesatii A. L. Sm.—Thallus densely white-pruinose, of 
more crowded growth, with the outer Jobes narrower. Apothecia 
pruinose, with a thick margin.—Ricasolia Cesatii Massal. Mem. 
Lich. p. 47, t. 8, fig. 46 (1853). Placodium Cesatii Leight. Lich. 
Fl. ed. 3, p. 164 (1879). Lecanora candicans var. Cesatii Nyl. 
ex Cromb. in Grevillea xviii. p. 46 (1889) & Monogr. i. p. 390. 
Hab. Similar to the species.—B. M. Sherbourne, Gloucestershire 
(the only British locality). 
2. L. holophea A. L. Sm.—Thallus squamulose, subcontiguous 
or imbricate, dull- or chestnut-brown, the squamules thickish, 
rounded and crenate (K—, CaCl—). Apothecia small, adnate, 
plane, with an entire margin, becoming convex and immarginate, 
the disc dark-brown ; paraphyses very slender, septate, with a 
brown subglobose or truncate head; spores oblong-fusiform, 
12-18 p long, 4-5 p thick.—Parmelia holophea Mont. in Webb 
& Berth. Hist. Nat. Canar. iii. 3, p. 113 (1840). Lecidea 
sublurida Nyl. in Mém. Soc. Sci. Nat. Cherb. v. p. 337 (1857) 
(nomen nudum). Thalloidima sublurida Mudd Man. p. 172 
(1861). Lecanora holophea Nyl. in Bull. Soc. Bot. Fr. vin. 
p. 755 (1861); Carroll in Journ. Bot. iv. p. 23 (1866); Cromb. 
Lich. Brit. p. 48 & Monogr. i. p. 392; Leight. Lich. Fl. p. 227 ; 
ed. 3, p. 217. 
Easicce. Leight. n. 380. 
The thallus recalls that of Lecidea lurida, but it is easily dis- 
tinguished by the apothecia. It is an Atlantic species that grows 
from the Canaries as far north as the British Islands. Carroll says it 
is not rare in crevices of rocks all round the Irish coasts. The spores 
in the British specimens, as far as observed, are about 14 » long and 
4yuthick. The spermogones have short septate sterigmata and straight 
short spermatia. 
Hab. On the ground in crevices of rocks and walls in maritime, 
very rarely in inland, districts.—-Distv. The Channel Islands, 5. and 
W. England and 8. and N.E. Ireland.—B. M. Moulin Huet Bay, 
Guernsey; Saltash and near Penzance, Cornwall; Bradstone and 
near \|Prawle Point, Devon; Pulborough, Sussex; near Bridgenorth, 
Shropshire; Sybil Head, Kerry; Coast of Clare; Kylemore, Conne- 
mara, Galway; Ardglass, Down. 
Var. glaucospora A. L. Sm.—Thallus paler, of smaller 
squamules, becoming whitish-leprose. _Apothecia with subentire 
persistent margin, otherwise as in the species.—Lecanora holophxa 
var. glaucospora Nyl. in Flora li. p. 164 (1868) ; Cromb. Lich. 
Brit. p. 48 & Monogr. i. p. 392; Leight. Lich. Fl. p. 227; ed. 3, 
p. 218. 
Exsice. Larb. Lich. Cesar. n. 79. 
Differs very considerably in the aspect of the thallus which often 
becomes granular or leprose, obscuring the squamules. 
Hab. On rocks in maritime districts.—Distr. Sparingly in the 
Channel Islands and 8. W. England.—B. M. Grosnez Common, Jersey; 
Saint’s Bay, Guernsey; Alderney ; near Endellion, Cornwall. 
