344 CYCLOCARPINEE [LECANIA 
p- 49 & Monogr. i. p. 407; Leight. Lich. Fl. p. 228; ed. 3, 
p. 219. 
Exsice. Cromb. n. 159. 
A well-marked plant, closely allied to, if not identical with, 
L. Rabenhorstii (Hepp) A. Zahlbr. It differs from L. erystbe in the 
rugged thallus and in the position of the apothecia at the tips of the 
papille. Some of the specimens are almost black, due, according to 
Crombie, to a drier habitat. Spermogones occur near the edge of the 
thallus, with arcuate spermatia 16-23 , long, 1 » thick. 
Hab. On granitic and schistose rocks in maritime districts. —Distr. 
Plentiful in the Channel Islands, 5.W. and N.E. England, N.E. 
Scotland and 8.W. Ireland.—B. M. Le Fret, Jersey; Jerbourg, 
Guernsey; Tolpedn, Penwith, near Penzance, Land’s End, and near 
the Lizard, Cornwall; Holy Island and Staples Island, Northumber- 
land; Portlethen and Cove, Kincardineshire; near Peterhead, Aber- 
deenshire ; Glandore, Cork; Shirky Island, Kerry. 
Var. maritima A. L. Sm.—Thallus granular, the granules 
more flattened than in the species, subcrenate at the circum- 
ference, greyish, sometimes dark-coloured. Apothecia on the 
granules, becoming immarginate.—Lecanora maritima Sommerf. 
in Vet. Acad. Handl. 1823, p. 116. L. aipospila var. maritima 
Nyl. Lich. Seand. p. 158 (1861) ; Cromb. Lich. Brit. & Monogr. i. 
p. 408; f. maritima Leight. Lich. Fl. p. 229 (1871); ed. 3, 
p. 219. 
Hab. On granitic and schistose rocks in maritime districts.— Distr. 
Local and scarce in §.W. and W. England and N.W. Scotland.— 
B. M. Near Penzance, Cornwall; Douglas, Isle of Man; Portlethen, 
Kincardineshire. 
Thallus effuse, variously areolate or granulose. 
8. L. albariella A. L. Sm.—Thallus jeffuse, thin, white- 
farinose, or irregularly granular-areolate (K —, CaCl —). Apo- 
thecia rather small, dark-coloured, becoming convex, with a thin 
white farinose disappearing margin ; paraphyses discrete, septate, 
slightly thicker and brown at the tips; spores ellipsoid, 8-12 u 
long, 3-5 pw thick ; hymenial gelatine quickly becoming violet- 
red with iodine.—Lecanora albariella Nyl. in Bot. Zeit. xix. 
p. 338 (1861) note & in Act. Soc. Linn. Bord. xxv. p. 63 (1864) ; 
Jones in Nat. Hist. Soc. Dublin, 1864, p. 119; Cromb. Lich. 
Brit. p. 50; Leight. Lich. Fl. p. 229; ed. 3, p. 219. L. erysibe 
subsp. albariella Nyl. in Flora Ixiv. p. 454 (1881); Cromb. in 
Grevillea xviii. p. 69 (incl. var. lactea) & Monogr. i. p. 444. 
Distinguished by the whitish cream-coloured thallus, more especi- 
ally evident in the apothecial margins, and by the discrete paraphyses. 
Hab. On caleareous (rarely arenaceous) rocks and mortar of 
walls.—Disty. Rare in 8. England and in W. and N.E. Ireland.— 
B. M. I. of Wight; near Eastbourne, Sussex; Clare Island, Mayo; 
Glenarm, Antrim. 
