LICHENES— DR JEAN MULLEE. 367 



Socotra. B.C.S. n. 1439 pro parte. Ad saxa quartzosa supra Wadi 

 Kischen, ad 600-650 m. Schweinf. 

 Distrib. Endemic. 



2. LECIDEA. 



Lecidea (thallo crustaceo, gonidiis globosis viridibus, apotheciis gymnocarpicis margine proprio 



prseditis, sporis hyalinis siniplicibus.) 

 Biatora, Mlill. Arg. Lich. Geneve 50. 

 Lecidea, Ach. pr. p. ; Nyl. pr. p. 

 Lecidea, Lecidella, el; Biatora, Korb. 



A very large genus of all regions, with a great many common species. 

 Cosmopolitan species have not been observed on the island. 



1. L. (Biatora) contractula, Mlill. Arg. in Proc. Roy. Soc. Edin. xi. 

 (1882), 463. 



Thallus cinereo-flavicans, crassitie mediocris, determinatus, continuus, demum tenuiter rimu- 

 losus, leviter rugulosus. Apothecia vulgo in depressionibus leviusculis thalli sita, nuda, 

 opaca, sicca subinnato-adpressa, obscure fusca et plana, madefacta fusca, distincte 

 prominentia et itnmarginata et magis convexa ; lamina circ. 55 /ul alta, apice olivascens, 

 cseterum cum bypotbecio hyalina, epitbecium distinctum deficiens ; paraphyses liberae. 

 Asci obovoideo-cylindrici, 8-spori. Sports ellipsoidese, 9 /x longse, 5 /u. latse.j 



Subaffinis L, impresses, Krplh., sed thallus flavicans, apothecia alia, emergentia, madefacta 

 statim more L. coarctatos, Nyl. turgescentia, sicca quasi subirregulariter contracta. 



Socotra. Ad saxa quartzosa supra Wadi Kischen, alt. 600 m. Schweinf. 

 Distrib. Endemic. 



2. L. (Biatora) plumbeella, Mull. Arg. in Proc. Roy. Soc. Edin. xi. 

 (1882), 463. 



Thallus suboibicularis, modice crassus, pallide virenti-plumbeus, ltevigatus, continuus, demum 

 minute rimulosus, margine linea hypothallina fusca ductus. Apothecia innata, haud 

 emergentia, discus 4— | mm. latus, concaviusculus, siccus fusco-nigricans, madefactus 

 f uscus, nudus ; epitbecium fuscescens; lamina cum hypothecio hyalina, circ. 100 //. alta. 

 Asci angusti, 8-spori. Sporse ellipsoid ese, 9-11 /x longaj, 4^-6 /u latse. 



Nulli cognitarum nisi brasiliensi L. impresses, Krplh. proxime affinis sed aliter colorata. 

 Apothecia madefacta utriusque consimilia. 



Socotra. Acl saxa quartzosa supra Wadi Kischen, alt. 650 m. Schweinf. 

 Distrib. Endemic. 



3. PATELLARIA. 



Patellaria, Mull. Arg. Lich. Geneve 56. 



Patellaria, DC. pr. p., Wallr. pr. p. 



Secoliga et Scolezites, Stitzb. Beitr. 159 et 162 pr. p. • 



