GLASGOW SOCIETY OF FIELD NATURALISTS. 93 



Pertusaria pertractata [jSp. nov.) 



Thallus albidus Isevigatus nonniliil ruguloso-insequalis (K — 

 C — )j apotliecia in verrucis thallinis prominulis, supra planius- 

 culis majvisculis sj)arsis, plura saepitis in singulis inclusa, ostiolis 

 saepissime papilla tis, pallidis vel pallide fuscescentibus ; sporse 

 Snse uniseriatse parvse, -026 — -038 X "013 — -018 mm., interdum 

 haloniatse ; paraphyses parcse. lodo thecse ccBrulescentes, gel. 

 hym. cseteroquin vix tincta. 



Ad ligna decorticata in Tasmania, lecta a H. Paton. 



This is closely alied to P. leioplaca var. minor, but the spores 

 are much smaller, &c. 



Lecidea subtecta, Sp. nov. 



Thallus albidus vix uUus (C. aurantiacus f) ; apothecia fusca vel 

 fuscescentia parva (latit. -2 — '4 mm.) plana vix marginata, in 

 textura ligni insculpta (C. rubricosa); sporse 8n8e incolores ellip- 

 soidese simplices '01 — '014 X 006 — '0075 mm., paraphyses 

 mediocres distinctse, apicibus fuscis magno-clavatis ramosis et 

 interdum articulatis; hypothecium incolor. lodo gel. hym. coeru- 

 lescens dein sordide violacea vel fulvescens. 



Ad ligna decorticata in Tasmania. 



Lecidea lampra, Sp. nov. 



Thallus albidus tenmssimus ; apothecia adnata nigra nitida 

 mediocria (latit. circiter 1 mm.) plana vel convexiuscula, vix 

 marginata, intus fuscescentia; sporse Snse incolores simplices 

 oblongse, "008 — 'Oil X '0025 — -003 mm., paraphyses non 

 discretse vel indistinctse, apicibus fuscis; hypothecium incolor 

 vel concolor. lodo gel. hym. intense coerulescens, ea strati 

 subhymenialis violacea. Thalamium K haud tinctum vel absolete 

 purpurascens (prsesertim epithecium). 



Ad ligna decorticata in Tasmania. Affinis L. euphoroidi (Nyl). 



There is present a white stratum subjacent to the hypothecium. 



This and the following are closely allied in several particulars, 

 and grow associated. The thalamia are almost identical in ana- 

 tomical characters, and present, especially under the action of K, 

 abundance of large granular cells, in size -003 — '004 X '002 

 — 0025 mm. The paraphyses are indistinct even under action of 

 the same reagent, and merely show as vague, straight threads 



