28 The Scottish Naturalist. 



Physcia chrysophthalma L. 

 Sqiiamaria chrysoleiica Sm. 

 Squainaria lentigera Web. 

 Placodium fulgens Sw. 

 Lecanora alphoplaca Whlmb. 



var. mclanaspis Acli. 

 Lecanora rubra Ach. 

 Pertusaria velata Turn. 



Pcrtusarla reducta n. sp. — Tliallus cinerascens vtl ciiiereo- 

 fuscescens tenuis rimuloso-areolatus (K fl. dein intense 

 rubens) ; apothecia sessilia, in verrucis thallinis monocarpis 

 inclusa, fusca vel rufo-fusca, lecanorina (latit. .3-. 5 mm.) 

 caesio-pruinosa ; thecse monosporse, sporse incolores vel 

 vetustge nonnihil fuscescentes, oblongas, .09-. 14 x .03-.04 

 mm. ; paraphyses confertae, sat distinctce, nonnihil anasto- 

 mosantes. lodo gel. hym. cserulescens, praesertim the- 

 carum. 

 Corticola. 



The younger spores have a broadish epispore, while the 

 mature have coarsely granular contents. Perhaps this is too 

 closely allied to P. rmiliipuucta (Turn.), but, as the open 

 lecanoroid state described by Nylander (Scand. p. 180) has 

 been referred to a distinct species, under the name P. oph- 

 thalmiza, with reactions of thallus K — C — , the present has 

 been separated from it. 



Lecidca polysita n. sp. — Thallus cinereus vel pallide cinereo- 

 fuscescens, crassiusculus (K — C — ), squamulosus vel 

 squamuloso-concretus, squamulis crenulatis et interdum 

 concaviusculis ; apothecia sessilia, fusca vel fusco-nigra, 

 planiuscula immarginata, demum convexa et prominula, 

 (latit. .4-1.3 mm.) ; sporai Snce aciculares vel nonnihil 

 bacillares, recta:, 3-ii-septata3, .045-.07x.003-.004 mm.; 

 paraphyses distinctai apicibus incoloribus non clavatis ; 

 hypothecium luteo-rufescens crassum, vel, in lamina crassa, 

 fuscum vel nigro-fuscum, K purpurascens, etiamque pars 

 infera hymenii. lodo gel. hym. intense et persistcnter 

 cajrulescens. 

 Ad corticem yetustum vel emortuum, prope Ben Brecht. 



Lccidia soreumidia n. sp. — Thallus pallidus vel pallide cinereus, 

 crassiusculus rugosus vel passim verrucoso-congestus, fusco- 

 limitatus (K — C — ); apothecia intus cinerascentia, conferta 



