112 I. DISCOIDEI. 8. LECIDINI. 



areolisque oriunda , thalli areolas aequantia, plana margine 

 crasso, atra , juniora cinereo-pruinosa , intus alba. Spic, 

 130. 195. Exs.469. — Ad saxa granitica Helvetife Schaer., 

 in Yogesis Mong ! in Suecia Fr ! in Norveg. prope Dront- 

 heim Unio itin. 1828 ! 



46. Lecidea pelidna (Acli. univ. 158). Thalli 

 areolae cir.ereae vel umbrino-fuscae, verrucosae. Apofhecia 

 e subiculo areolisque oriunda , tlialli areolas aequantia vel 

 superanlia , plano-convexa margine tenui , atro-rufa, tandem 

 alra , huda , intus alba. Spic. 130. 195. — Ad saxa 

 granitica in alpibus helveticis Schaer. e Brittann. Borr! — 

 Areolae per subiculum nigrum sparsae vel in crustam areolalo- 

 verrucosam confertae. Apothecia juniora concava , rufa , 

 margine pallidiore ; adultiora plana , atro-rufa , margine 

 prominente , saepe flexuoso •, tandem convexa fiunt et atra. 



47. Lecidea prominula (Borr. in EB. Suppl. I. 

 t. 2687. f. 1). Thalli areolae fumoso-cinereae vel fuscae, 

 minute-verrucosae. Apothecia superficialia , minuta , plano- 

 convexa margine tenui prominente , atra , nuda , intus 

 cinerea. — Ad saxa pyritica in Sussex Downs. 



/8. obscura crusta magis fusca et aequabili, tenuiter 

 rimosa. — Ad saxa arenaria prope Rye Borr. — Species mihi 

 suspecta. — Specimen minus significans in collectione 5a/«ces^i 

 obvium, in saxo arenario granuloso crescens thallum offert vix 

 conspicuum apotheciaque intus alba , exfus , dum humec- 

 tantur , atro-rufa , acceditque ad formas acrustaceas in saxo 

 arenario occurentes Lecid. immersae. 



48. Lecidea am phibia (Fr. in Act. N. Stockh. 1822. 

 p. 262). Thalli areolae caesio-cinerascentes, verrucosae, 

 in crustam areolato-verrucosam, subiculum fere absconden- 

 tem confertae. Apothecia e subiculo oriunda , thalli areolas 

 superantia ; juniora plana margine prominente , adultiora 

 convexa , atra , nuda , sub lamina alba , strato inferiore 

 carbonaceo. Spic. 194. Fr ! exs. 381. — Ad saxa gra- 

 nitica Helvelife (Hasligrund) Schaer ^ ad lacus sylvaticos 

 Suecise Fr ! 



48. Lecidea tessellata (Flk! D. L. n. 64). Thalli 

 areolae albae vel cinerascentes , in crustam rimuloso-areo- 

 latam confertae. Apothecia innata, thalli areolas aequantia, 



