LEPTOGIUM. ] COLLEMEI. 69 
Carnarvonshire ; Beaumaris, Island of Anglesea ; near Oswestry, Shrop- 
shire; Teesdale, Durham; Kentmere, Westmoreland. New Galloway, 
Kirkcudbrightshire ; Ben Cruachan and Loch Oreran, Argyleshire ; Ben 
Lawers and near St. Fillans, Perthshire; Craig Guie, Braemar, Aber- 
deenshire. Luggelaw, co. Wicklow; Killarney, co. Kerry; Kylemore, 
co. Galway. 
Subgen. 2. EULEPTOGIUM Cromb. Journ. Bot. 1874, p. 133.— 
Thallus more or less foliaceo-membranaceous, cellulari~corticate on 
both surfaces; internally with entangled tubular cavities; gonimia 
moniliform. Apothecia lecanorine ; spores variously divided. 
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Fig. 18. 
Leptogium lacerum Fr.—a. Fragment of a thalline lacinia showing the fimbri- 
ature, X 30. 8. Texture of section of the thallus, x 200. ¢. Section of 
young apothecium in dry state, x 30, and c', the same of an older apothe- 
cium. d. Theca with a paraphysis, x 350. e. Spores, x 500. /. Section 
of thallus (moistened) with two spermogones, x 30, g. Sterigmata and 
spermatia, X 500. 
12. L. lacerum Gray, Nat. Arr. i. (1821) p. 401.—Thallus thin, 
lacero-laciniate, longitudinally rugulose, olive-brown or leaden ; 
lacinis subimbricate, subascending, crisp and ciliato-dentate at the 
margins. Apothecia small, scattered, concave, brownish- or pale- 
red, the thalline margin thickish, entire; spores ovoid, or narrowed 
at either apex, irregularly murali-locular, 0,034-48 mm. long, 
0,010-16 mm. thick.—Nyl. Syn. i. p. 122, . ii. f. 6; Mudd, Man. 
