L1CHENES — DR JEAN MULLER. 387 



1. V. rupestris, Schrad., var. alocizoides, Mull. Arg. in Proc. Roy. Soc. 

 Eclin. xi. (1882), 471. 



Thalli plagulae irregulariter orbiculari-angulosae, vix \ cin. latae, varie confluentes, linea hypo- 

 thallina nigra cinctae et thallum composituni crebre geographicum et subsulcato-peragratum 

 formantes; sporae 18-24 fx longae, 11-15 fx latae. 



Primo intuitu Verrucariam calcisedam v. alocizam Arn. simulat, seel apothecia et sporae majora. 



Soeotra. Ad saxa calcarea. B.C.S. n. 1332. 

 Distrib. Endemic. 



2. V. prominens, Miill. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 472. 



Thallus tenuis, effusus, continuus, laevis, olivaceo-virens, dein diffracto-areolatus et pallidicr 

 v. demum ochraceo-argillaceus ; apothecia \-\ mm. lata, elato-semiglobosa, basi 

 truncata, nigra, scabridula, primum thallo leviter velata, mox prominenti-emersa 

 et nuda, vertice rotundato-obtuso integra, perithecium integrum sed basi tenuius ; 

 paraphyses molliusculae, apice subclavatae et ibidem 3 /x latae, distanter septatae ; asci 8- 

 spori, oblongato-obovoidei, pachydermei; sporae (hyalinae et simplices) oblongato-ellip- 

 soideae, 15-21 fx longae, 7-8 /x latae. 



Ad chaoticam Verrucariam margaceam, Nyl. Pyren. p. 25 referri possit. Apothecia magis 

 emergentia quam in V. elaeina, Mass. Kbrb., demum magis elevato-hemisphaerica, ceeterum 

 ei proxima. 



Soeotra. Ad saxa quartzosa. B.C.S. n. 1378. 

 Distrib. Endemic. 



2. MICROGL^ENA. 



Microgyria, Korb. Syst. 388 (1855); Stitzb. Beitr. 149. 

 Thelcnella, Nyl. Essai 193 (1855). 



A very small northern genus. 



M. saxicola, Mull. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 471. 



Fere omnino cum europaea et corticola M. Wallrothiana, Korb. conveniens, sed thallus paullo 

 obscurior, subfusco-olivaceus, mox rimoso-diffractus, verrucas thallinas (1-v. rarius 2-3-car- 

 picae) leviter minores, apice non vel vix distincte umbilicato- depresses et circa ostiolum 

 fuscum minus pallidiores et sporae ambitu angustiores; gonidia globosa ; perithecium 

 globosum, hyalinum apice atro-fuscum (pars fusca non est epithecium), nucleus hyalinus, 

 paraphyses capillares, 1\ /x latae, inferne intricatim connexae ; sporae hyalinas, 28-33 u 

 longae, 9-11 /x latae, transversim circ. 7-9-septatae, loculi suboblique longitrorsum 2-4- 

 septati. 



Soeotra. Ad saxa quartzosa supra Wadi Kischen, alt. 650 m 

 Schweinf. 



Distrib. Endemic. 



