256 Dr. W. Nylander on new British Lichens. 



XXXI. — Notul(2 Lichenologicm. No. XVII. 

 By the Rev. W. A. Leighton, B.A., F.L.S. 



Dr. Nylander makes the following additions to the Lichens of 

 Great Britain in the ' Flora/ April 26, July 17, and August 17, 

 1867:— 



1. Melaspilea amota, Nyl. 



Thallus macula albida indeterminata indicatus vel vix ullus dis- 

 tinctus; apothecia nigra, innata, rotundata vel rotundato- 

 difformia (latit. 0*5 millim. vel parum amplius), margine pro- 

 prio tenui iusequali; sporse 4— 8, incolores, l-septatse, medio 

 constrictee, longit. 0016-0-023 millim., crassit. 0-007-0-010 

 mdUin.; paraphyses vix ullse ; thecse confertse ; epithecium 

 fuscescens vel fusco-luteum ; hypothecium tenuiter et leviter 

 vage obscuratum. lodo gelatina hymeuea vel thecse dilute 

 cserulescunt (qui color deiu evanescit). 

 Killarney, Ireland (Mr. I. Carroll). 



A M. arthonioide [Spi^engelii, Ach.) mox paraphysibus defi- 

 cientibus distat. Apothecia interdum epithecio fusco-rufescente 

 in statu humido j ssepe circumscissa (h. e. fissura cincta). 



2. Arthonia ilicinella, Nyl. 



Simihs A. iliciruB, Tayl., sed ssepius minor, sporis ssepius minori- 



bus (sed variant longitudine 0-021-0-036 millim., crassit. 



0*008-0-012 millim.), et iodo gelatina hymenea vinose rubes- 



cente (nulla visibili cserulescentia). 



Ad corticem Ilicis in Hibernia, Killarney, legit Carroll. 



Sporse 3-6-septatpe, plerumque bene evolutse et majores 5- 

 septatse. Accedit versus A. cinnabarinam. In A. ilicina iodo 

 gelatina hymenea cserulescit (cserulescentia persistente). Epi- 

 thecium hydrate kalica sordide cserulescit. 



3. Verrucaria achroopora, Nyl. 



Thallus hypophloeodes, macula pallido-glaucescente indicatus ; 

 apothecia extus protuberantia thallode leviter convexiuscula 

 (diam. 0*5 millim.) et ostiolo subincolore vel pallido puncti- 

 formi (diam. 0*05-0'07 millim.) non impresso indicata, con- 

 ferta, perithecio immerso integre (sat tenuiter) nigro (diam. 

 0'4-0*5 millim.), ssepe depressiusculo ; sporse 8, fuscse, 4- 

 loculares, longit. 0016-0-019 millim., crassit. 0-006-0009 

 millim. 



In Hibernia, Killarney, ad corticem legit Carroll. 

 Arete accedit ad Pijrenulam porinoidem, Ach. Syn. p. 128, et 



vix est nisi ejus varietas ostiolis incoloribus vel pallidis (raro 



obscuris). Facies Thelotrematis. 



