Dr. Nylander on Lichens in the Luxembourg Gardens. 247 
13. Lecanora vitellina, var. epixantha (Ach. L. U. 208, sub 
Lecidea), Nyl. L. Scand. 141. Seepius fertilis. K—. 
14. Lecanora cerina (Ehrh.), Ach. Forma thallo cinereo 
turgescente rugoso ; fertilis. 
15. Lecanora pyracea, f. pyrithroma, Ach., Nyl. Scand. 145. 
Forma rupestris (Scop.), Nyl. d.c. Sporis 1-sept. varian- 
tibus septo crassiore. 
16. Lecanora sophodes, vay. teichophila, Nyl. Fertilis. 
Var. exigua, Ach. Nyl. Scand. 152. 
17. Lecanora circinata (Pers.), Ach., Nyl. Scand. 152. Fer- 
tilis. 
18. Lecanora galactina, Ach., Nyl.l.c. 134 (sub Squamaria). 
K—. Gel. hym. iodo cerulescens, deinde szepe vix nisi thece 
sic tincte. 
Note.—Lecanora dispersa (Pers.) =L. galactina ecrustacea. 
Apothecia ZL. disperse livido-pallescentia vel subcornea aut 
nigrescentia pruinosa, margine albo crenulato vel obsolete 
crenulato (seepe subintegro vel farina epithallina alba crenu- 
lato), trita obvenientia margine proprio subconcolori demum 
explanato; spore 8, ellipsoidez simplices; paraphyses graci- 
lente (seepius apice incrassate ibique granulationibus in- 
sperse). K—. 
19. Lecanora urbana, Nyl. 'Thallus albus opacus granu- 
lato-squamulosus, granulis depressis crenatis, mediocris ; apo- 
thecia pallido-subincoloria leviter albo suffusa conferta medio- 
cria, margine thallmo subcrenulato cincta, sepe subangulosa ; 
sporee 8, ellipsoidex; paraphyses crassiuscule, articulate, apice 
incolori, non clavate. Gel. hym. iodo cerulescens, dein vix 
nisi thecee (sordide violaceo vel czrulescenti) tincte. Ad 
lapides, Rue de l'Ouest. 
Note.—A L. galactina presertim differt thallo firmiore pu- 
rius albo et paraphysibus duplo vel triplo crassioribus distincte- 
que articulatis. 
Comparanda est cum JL. galactina nova species in regione 
Parisiensi vigens Lecanora teichotea cui thallus albidus sub- 
radiato-rimosus, ambitu placodioideo effiguratus; apothecia 
fusco-rufa convexiuscula, margine thallino crenulato cincta ; 
spore 8, ellipsoidee ; paraphyses capitulo lutescente ; spermo- 
gonia incoloria (extus solum puncto obscuro indicata), sper- 
matis arcuatis. Pertinet vero-hec ad aliam stirpem Lecano- 
rarum ; thallus C+ erythrinicam dilutam. Affines L. tezchotewe 
sunt L. pruinifera, Nyl. (L. pruinosa, Chaub. in St. Am. FI. 
Ag. 497, nomen non retinendum ob idem alii datum) et Z. 
Reuterti, Scher., quarum thalli C+ erythrinice. 
20. Lecanora dissipata, Nyl. Thallus preecipue hypothallo 
nigricante subleproso indeterminato constans; apothecia sub- 
