LICHENES— DR JEAN MULLER. 371 



5. B. leucina, Mull. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 464. 



Thallus tenuiter tartareus, suborbicularis, linea nigra hypothallina cinctus, albus, laevigatas, 

 rimoso-areolatus, secus peripheriam baud rimulosus, areolae contiguae, majuscuhe, 1—3- 

 carpicae, fissuris nigris separatae. Apotbecia innata, primum margiae accessorio albo- 

 pulverulento crenato cincta, deiri nucla et e superficie thalli leviter euiergentia, tota con- 

 coloria, extus intusque nigra, tenuiter et obtuse nano-marginata ; epithecium late atro- 

 fuscum; lamina vitreo-hyalina; bypotbecium latiuseule byalinum, inferne late fuscum. 

 Sporae (2-loculares) circ. 12 ^ longae, 6 /m. latae. 



Similis B. albinece, Mull. Arg., sed tballus alius ; apotbecia ut in B. Becoharina (Mass.). Ex 

 descriptione proxime ad Lecideam rimulatam, Nyl. accedit. Etiam Lecidca continens, Nyl. 

 (ap. Cromb. Licb. Rodrig. in Trim. Journ. of Bot. v. 15, p. 442), cbaracteribus valde 

 accedit, sed e margine fuscescente verisimiliter est Binodince species. 



Socotra. Ad saxa quartzosa. B.C.S. n. 1400 pro parte. 

 Distrib. Endemic. 



6. B. substigmatea, Miill. Arg. in Proc. Eoy. Soc. Edin, xi. (1882), 465. 



Tballus tenuissimus, vage effusus, continuus, laevis, olivaceo-virens, demum subrimoso-areolatus 

 et undulato-inaequalis, semper valde tenuis. Apothecia arete sessilia, •£-£ mm. lata, plana, 

 prominenter marginata, nigra, satis madefacta tamen fuscescentia, margo iuteger, ab origine 

 niger; lamina circ. 50 /u. alta, vitreo-hyalina ; epithecium fuscum ; bypotbecium hyalino- 

 subfuscum; paraphyses apice capitatae. Asci latiusculi, 8-spori. Spora? 2-loculares, 10-13 /x 

 longae, 7-8 /x latae. 



Juxta B. stigmateam, Korb. et B. cequcdem, sc. Lecideam cequalem, Nyl. Lich. Kurz. Bengal, n. 9. 

 locanda est. 



Socotra. Ad saxa porphyrica. B.C.S. n. 1440. 

 Distrib. Endemic. 



var. obfuscata, Miill. Arg. in Proc. Eoy. Soc. Edin., xi. (1882), 465. 

 Thallus magis distincte rimoso-areolatus et olivaceo-fuscus. 



Socotra. Ibidem saxicola. B.C.S. n. 1444 pro parte. 

 Distrib. Endemic. 



7. B. innata, Miill. Arg. in Proc, Eoy. Soc. Edin. xi. (1882), 465. 



Thallus tenuiter tartareus, circ. | mm. crassus, suborbicularis, linea hypothallina nigra valida 

 cinctus, argillaceo-albidus, primum continuus, mox quoad partem superficialem rimoso- 

 areolatus, areolae contiguae planse, laeves, opacse. Apothecia in areolis, v. rarius etiam in 

 rimi3 sita, tota altitudine immersa, atra, obsolete et tenuiter nigro-marginata, opaca, 

 evoluta ^ v. fere § mm. lata, discus leviter concavus; lamina circ. 55 fi alta, hyalina ; 

 epithecium cum hypothecio crasso atrofuscum; paraphyses apice capitatee. Sporae octonae, 

 latiuseule ellipsoideae, medio non constrictse, utrinque rotundato-obtusae, 9-10 fx, longae 

 5^-6£ \l latae. 



Juxta B. lacteam, Korb. et B. receptam (Krplh.), Miill. Arg. inserenda est. 



