Dr. W. Nylander on new British Lichens. 331 



granulatus ; apothecia nigra, convexula (latit. 0-4^0*5 millim.), 

 immarginata, intus obscura ; sporse 8, incolores, oblongae vel 

 subbacillares, l-septatse, variabiles, long. 0-010-0*017 millim., 

 crass. 00030-0'0035 millim.; paraphyses baud discretse; 

 epitbecium nigricans ; bypothecium subincolor vel leviter sor- 

 dide fuscescens. Gelatina hymenea iodo (saltem leviter) 

 caerulescens, dein lutescens. 



Supra terram scbistoso-micaceam in alpe Scotiae Ben Lawers 

 (Admiral Jones). 

 Accedit ad L. glohulosam, sed faciem habet melana. 



2. Lecidea circumpallens, Nyl. 



Thallus pallide cinerascens, tenuis, rimosus; apothecia fusco- 

 nigra (latit. circ. 0*5 millim.), margine (peritbecio) pallido 

 demum excluso et ssepe tum tota fusco-rufescentia, plana vel 

 convexiuscula, intus incoloria ; sporse 8, fusiformes vel fusi- 

 formi-aciculares, rectse (l-)3-septat3e, long. 0'018-0'025 mil- 

 lim., crass. 0'0020-0-0035 millim.; epitbecium vage nonnibil 

 nigrescens aut subincolor; bypotbecium incolor; parapbyses 

 crassiusculse, non bene discretse. Gelatina bymenea iodo 

 vinose rubens (prsecedente cserulescentia levi). 



Supra terram argillaceam in Hibernia prope Eoss (Mr. I. 

 Carroll). 



Vix nisi varietas L. bacilli/era. 



3. Lecidea consentiens, Nyl. 



Tballus albidus, mediocris, rimoso-diffractus ; apotbecia nigra, 

 innata (latit. 0*9-1 '5 millim.), plana, nonnibil ssepius impressa 

 et inde quasi margine obtuso ssepe cincta ; sporse 8, incolores, 

 ellipsoidese, simplices, long. 0*027-0*038 millim., crass. 

 0*016-0022 millim. ; parapbyses graciles (crass. 00010- 

 0"0015 millim.); epitbecium fuscescens; bypotbecium fuscum. 

 Gelatina bymenea iodo caerulescens, dein nonnibil sordide 

 vinose rubescens (fulvescens). 



Ad saxa micaceo-scbistosa cacuminis Ben Lawers (Admiral 

 Jones) . 



Facies Lecanora cinerecB formse. 



Differt Lecidea consentiens ab affini L. rJiatica, sporis majori- 

 bus, epithecio fuscescente (in L, rhaiica epitbecium caerulescens 

 vel cseruleo-nigrescens), reactione iodica (nam in L. rhatica gela- 

 tina bymenea iodo intense et persistenter cserulescit). L. panceola 

 diflfert cepbalodiis, tballo bypocblorite calcico saltem dilute ery- 

 thrinice tincto &c. 



