LECANORA. } LECANO-LECIDEEI. 427 
host of Arthonia varians (Day.). The spermogones have the spermatia 
arcuate, 0,022-23 mm. long, about 0,0005 mm. thick. 
Hab. On schistose, very rarely cretaceous, rocks in maritime districts. 
Distr. Local in the Channel Islands, 8.W. and N.W. England, Wales, 
the 8.W. Highlands and N.E. Scotland, S. and N.E. Ireland.—B. M.: 
Noirmont, Island of Jersey; Vale Bay, Island of Guernsey. Between 
Porlock and Lynton, Devonshire ; Penzance, Cornwall; Manorbeer, near 
Tenby, Pembrokeshire; Southerndown, Glamorganshire; The Mowd- 
doch and’ Barmouth, Merionethshire; Pwllheli, Carnarvonshire, Port 
Soderick, Isle of Man. Loch Creran, Argyleshire ; Portlethen, Kincar- 
dineshire. Kilkee, co. Clare; Ardglass, co. Down. 
Form sublutior Nyl. Flora, 1882, p. 456.—Thallus as in the 
type. Apothecia pale-brownish.—Cromb. Grevillea, xix. p. 60 
(lapsu s. n. dilutior). 
Differs in the colour of the fruit, which probably arises from the habitat. 
Tn the single British specimen the thalline margin of the apothecia is here 
and there evanescent, so that they then appear biatoroid. 
Hab. On moist schistose rocks in a maritime district. Distr. Ex- 
tremely rare in N.E. Scotland.—B, M.: near Cove, Kincardineshire, 
109. L. prosechoidiza Nyl. Flora, 1881, p. 3.—Thallus thin, 
areolato-diffract, greyish (K—, CaCl—). Apothecia moderate, 
blackish or brownish-black, at first with entire whitish thalline 
margin, at length convex and immarginate; spores ellipsoid, 0,009- 
12 mm. long, 0,004-6 mm. thick; paraphyses rather coherent; 
hymenial gelatine bluish and then (especially the theca) violet or 
subtawny with iodine——Cromb. Journ. Bot, 1885, p. 195. 
Approaches the preceding species, from which it differs more especially 
in the less discrete paraphyses. Nvlander, J.-¢., observes that it is 
probably to be regarded only as a subspecies of L. umbrina; but from 
this it at once differs in the colour of the apothecia. In the single 
British specimen the thallus is indeterminate and the apothecia are 
numerous. The spermogones are only here and there visible, with 
spermatia 0,016-22 mm. long, 0,0005 mm. thick, 
Hab. On schistose rocks in a maritime district—Dvstr. Extremely 
local and scarce in. N.E, Scotland.—B, M.: near Portlethen, Kincardine- 
shire. 3 
110. L. conferta Nyl. Ann. Sc. Nat. Bot. 1867, p. 314, nota 1. 
—Thallus effuse, thin, granulato-unequal, greyish-white or greenish-- 
grey, often obsolete (K—, CaCl—). Apothevia small, plane, 
crowded, subangulose, testaceous or pale-testaceous, with thin 
crenulate thalline margin, or frequently subbiatorine ; spores 0,009 
-15 mm. long, 0,0045-55 mm. thick; paraphyses submoderate, 
brownish at the apices; hymenial gelatine deep-bluish (the thece 
dark-violet) with iodine.—Cromb. Grevillea, xvili. p. 69.—Lecanora 
umbrina var. conferta Cromb. Journ. Bot. 1870, p. 97. L. Hageni 
var. conferta Leight. Lich. Fl. p. 208, ed. 3, p. 192. Patellaria 
conferta Dub. Bot. Gall. ii. (18830) p. 654. 
