362 BOTANY OF SOCOTRA. 



pro parte, 1435, 1444 pro parte. Ad Wadi Kischen, alt. 600-650 m. 

 Schweinf. 



Distrib. Endemic. 



f. livido- nigricans, Miill. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 

 462. 



Discus apotheciorum demum e fuscescenti livido-nigricans. 



Socotra. Cum forma genuina speciei. B.C.S. n. 1402 pro parte. 

 Distrib. Endemic. 



3. RINODINA. 



Rinodina, Korb. Syst. 122 ; Th. Fries Heterol. 71 ; Miill. Arg. Lich. Geneve 48. 

 Rinodina, Mass. Eic. 144 pr. p.; Stitzb. Beitr. 169 pr. p. 

 Lecanora, Acb. pr. p. ; Nyl. pr. p. 



This genus, which corresponds exactly to Buellia amongst Lecideese, is chiefly 

 known from colder and temperate regions of the northern hemisphere; a few 

 species are also known from the warmer regions of the globe. 



1. R. teichophila var. corticola, Arnold Ausfl. 3, p. 6, et 5, p. 18. 



Socotra. In ramis fruticum supra Wadi Kischen, alt. 1000 m. 

 Schweinf. 



Distrib. Europe. 



2. R. substellulata, Mull. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 461. 



Thallus obscure cinereus v. obscure cinereo-albescens, tenuis, sublimitatus v. hinc iude effusus, 

 teDuiter areola to-rimosus, areolae contiguse, planae, lseves, opacEe. Apotbecia adpresso-sessilia, 

 |— J mm. lata, regularia, plaua, margo primum tballodes, crassiusculus, mox tenuior et 

 fuscescens v. fere lecideino-uigricans, discus madefactus et junior fuscus v. obscure fuscus, 

 dein nigricans, bene madefactus tamen fuscescens; epithecium fuscum v. olivaceo- 

 nigricans; lamina circ. 100 u alta, byalina; bypotbecium byalinum v. distincte flavescens; 

 parapbyses subliberae. Sporse (fusca?, biloculares) 15-20 /x longoe, 9-11 p lata?, medio 

 leviter v. vix constrictse. 



Habitu ad Rinodinam minutidam, Miill. Arg. accedit, sed thallus distincte areolato-rimosus et 

 apotbecia mox sublecideia. Hie forte pertinet Lecanora sophodes, Nyl. var. atro-albida, Nyl. 

 (Lich. Port. Natal, p. 26), planta enini Budliara stellulaiam, Mudd. quodammodo simulat et 

 apotbecia sessilia sunt. 



Socotra. Ad saxa quartzosa supra Wadi Kischen alt. 650 m. Schweinf. 

 Distrib. Endemic. 



3. R. minutula, Mull. Arg. L. B. n. 121. 



Thallus melius servatus quam in speciminibus antea descriptis potius flavicanti-cinereus quam 

 cinereo-albidus dicendus est, et discus apotheciorum primum fuscus est. 



