25/| W. NYLANDKK. 



7. St. variabilis (Bor.) Del. — Hue pertinet quoque St. Boryana Del. 

 (thallo infra ochraceo-pallenle) et St. papyracea Del. Forma linearifolia 

 Nyl., laciniarura divisione accedens ad St. damaecornem minorem et lliallo 

 infra nudo, adest ex insula Mauritii in hb. Lenormand. 



c. - — Cyphellse pulvenilenlœ. 



8. St. argyracea (Bor.) Del. (St. rigidula Del.; St. flavescens Del.; 

 St.aspera Laur.). — Salis polymorpha. Sorediis feredestituta est flavescens 

 Del., qusB tangit sequentem. 



9. St. intricataftel. — Ad Iruncosarborum in sylvis cum praacedenle, 

 quacum confluere videtur. 



10. St. carpoloma Del. — Variât simul in Insula Borbonia cyphellis 

 albis, var. albo-cyphellata^yX. 



11. St. aurata Ach. (St. aurora DN. et clathrata DN. vix ab hac dif- 

 ferunt). — Simul angustata (Del. Stict. p. 52, t. 3, f. 7), quae lobis 

 angustioribus vix ne (juidem ut varielas distinguenda sit. 



12. St. Mougeotiana Del. — Variât marginibus laciniarum citrino- 

 sorediatis, var. 1) xantholoma Del. — -Variât dein thallo citririe sorediato- 

 marginato, accedentibus sorediis aliis rolundatis sparsis, var. 2) aurigera 

 (Del.; St. xantlioslicta Pers.). — Variât adhuc in Insula Borbonia cyphellis 

 albicantibus vel albis, var. 3) albo-cyphellata Nyl. 



Kicasolsa DN , Nyi. 



1. R. discolor (Ach., Del.). — Frequens seque ac in Madagascar. — 

 Sporselong. 0,026-36, crass. 0,009-0,011 millim. 



2. R. dichroa Nyl. — Species facie accedens ad prsecedentem, at 

 thallo supra passirn rugoso, subtus fuscescente, sporis elongatis angustis 

 (long. 0,070-76, crass. 0,006 millim.) longe differt. — In însula Bor- 

 bonia lecta a Boivin (In Madagascar a Pervillé). 



3. R. crenulata (Hook. )v ar. stenosporaNyl . — Thalluscrebrius plerum- 

 que tenuiter inaequalis (quam in typo speciei), margine crenatulo, spofâe 

 sa3pissime solum uni-septatae angustse , long. 0,050-0,090, crass. 

 0,003-A millim. — Jn Insula Borbonia lecta a Boivin. (In Insula Mauritii, 

 ex hb. Hooker.) 



l*ai*melia Ach., Nyl. 



1. P. sphœrospora Nyl. — Thallus flavicans vel flavo-cinerascens 

 membranaceo-iirmus, s&pe rugosus, lobatus, infra fusco-nigricans, intus 

 ssepius dilute citrinus ; apothecia majuscula fuscorufa; spora3 



