LEPTOGIUM.] 



89 



Carnarvonshire ; Beaumaris, Island of Anglesea ; near Oswestry, Shrop- 

 shire ; Teesdale, Durham ; Kentmere, Westmoreland. New Galloway, 

 Kirkcudbrightshire ; Ben Cruachan and Loch Creran, Argyleshire ; Ben 

 Lawers and near St. Fillans, Perthshire ; Craig Guie, Braemar, Aber- 

 deenshire. Luggelaw, co. Wicklow ; Killarney, co. Ken-y ; Kylemore, 

 co. Galway. 



Subgen. 2. EIJLEPTOGIUM Cromb. Journ. Bot. 1874, p. 133. 

 Thallus more or less foliaceo-membranaceous, cellulari-corticate on 

 botb surfaces ; internally with entangled tubular cavities : gonimia 

 moniliform. Apothecia lecanorine ; spores variously divided. 



Fig. 18. 



Leptogium lacenim Fr. a. Fragment of a thalline lacinia showing the fimbri- 

 ature, X 30. b. Texture of section of the thallus, X 200. r. Section of a 

 young apotbecium 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. Steriginata and 

 spermatia, X 500. 



12. L. lacerum Gray, Nat. Arr. i. (1821) p. 401. Thallus thin, 

 lacero-laciniate, longitudinally rugulose, olive-brown or leaden ; 

 laciniae 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, t. ii. f. : Mudd. Man. 



