275 
 riete cellulari nullo cireumdata). Thallus fere erassior quam in V. maura 
 comparanda. Perithecium pallidum. ; 
+ V. MUCOSA Ach., Whinb. Lapp. Pp. 28, Nyl.: Pyrenoc. p. 28. — Thal- 
lus olivaceo-nigrescens vel nigricans levis continuus, sat tenuis, vix 
nitidiusculus (passim, saltem interdum, obsolete rhagadiosus vel fissu- 
ras rhagadiosas sparsas offerens); apothecia immersa (in protube- 
-rantiis depressis vel obsoletis thalli), intus albida, parva, perithecio 
petra pe 
ersas in Suecia et Lapponia (ex Wahlenberg et Achario). Quoque 
ad Kristinestad in Fennia (A.J. Malmgren, at apotheciis haud rite evo- 
 Intis). 
17. V. Dufourei DC., Fr. L. E. p. 433, Nyl. Pyrenoc. 
Pp 29. : 
—Thallus macula cinerascente limitata indicatus; apothecia 
majuscula (latit. 0,3—0,4 -millim.), sepe (saltem hinc inde) 
 erebra, perithecio dimidiatim nigro; spor&e ellipsoidex simpli- 
longit. 0,016—-19, crassit. 0,008—0,010 millim. 
d rupes caleareas in Gottlandia. 
Sub nomine ”Verrucaria truncata” Lönnr. inde quoque vidi varieta- 
itatam (Kphb.) Nyl. 1. c., differens thallo (vel macula thallina) 
| nigricanti-limitato, apotheciis et sporis minoribus (his long. 
0,012—14, crass. 0,007—8 millim., in specimine e Gottlandia). 
18. V. rupestris Schrad., Nyl. Pyrenoc. p. 30. 
Thallus albidus vel albus parcus tenuissimus vel obsoletus 
 fvånescensque (inter particulas superficiales saxi tum occultatus); 
 WPothecia immersa, perithecio parte supera nigra et parte 
 intrusa pallida (vel pallescente); sporae ellipsoidex, longit. 
0,020—25, crassit. 0,010—13 millim. 
i Ad Saxa calcarea et muros in Scandinavie regionibus calca- 
tis, verisimiliter haud rara. Adhuc in Finlandia saltem media 
2 muros (vel eorum cimentum). j 
"VV. muralis Ach., Nyl. 1. c. p. 32, parum differt apo- 
lis magis emersis, perithecio dimidiatim nigro superficiali. 
3 Ad lapides murosque calcareos et tegulas lateritias passim. — 
| Occurrit ejus forma ferruginosa, thallo tepui ochraceo-ferrugi- 
M0so (e ferro saxi calcarei), saltem in Soankylä (Edwin Ny- 
