GLASGOW SOCIETY OF FIELD NATURALISTS. 89 



Lecidea Relicta, Sp. nov. 



Thallus nigro-cinereus rugosus fere granulosus ; apothecia adnata 

 nigra parva plana, obtuse marginata, demum convexa immarginata 

 et rugosa ; sporse Snse incolores simplices oblongse, -009 — -013 X 

 •005 — "006 mm., parapliyses parcse graciles satis bene discretse 

 pellucidse, apicibus clavatis fuscis ; liypotliecium fusco-nigrum. 

 lodo gel. hym. leviter coerulescens dein vinose rubens. 



Ad saxa, Blair Atbole. 



Lecidea Hemipoliella. (Nyl.) 

 * semialbula. 

 Thallo bene evoluto, albido vel lividescenti-albido tenui, leviter 

 rimuloso-areolato. 



Ad ligna decorticata prope Altnaharra. 



The spores are very frequently (2 — 4) nucleated, and the septa 

 are frequently indiscernible except under the action of K. 



Lecidea Plicatilis (Leight). 

 Ben Lawers. 



Opegrapha atricolor, Sp. nov. 



Thallus albidus tenuissimus, indeterminatus ; apothecia nigra 

 innato-sessilia angusta (latit. vix "1 mm.) plerumque simplicia 

 acutiuscula, intus cinerascentia vel pallide fiiscescentia (K purpura- 

 scenti-dissoluta, prsesertim stratum subliymeniale), epitliecium 

 primum rimiforme dein concaviusculum vel etiam explanatum, 

 rugulosum ; sporse (4 - 8)n8e oblongo-ovoidese incolores 3-sep- 

 tatse, -015 — -021 x "004 — -00.55 mm., parapbyses indistinctse 

 irregulai'es, apicibus fuscis ; liypotliecium fusco-nigrum. lodo pars 

 supera hymenii persistenter coerulescens, infera, e flavente vinose 

 rubescens dein vinose rubens. 



Ad ligna decorticata prope Altnaharra. 



Affinis 0. atrse. 



Arthonia iNsmuATA, Sp. nov. 



Thallus albidus vel pallidus subsquamvilosus tenuissimus ; 

 apothecia adnata fusca, vel fusco-nigra, rotunda vel oblonga vel 

 nonnihil irregularia (primum velata) plerumque margine thallino 

 squamulosulo cincta, intus pallida ; sporse (4-8)n8e incolores inter- 



