LICHENES — DR JEAN MULLER. 389 



A. libricolum, Miill. Arg. Lich. Afric. Occid. n. 52. 



Verrucaria lihricola, Nyl, Syn. Lich. Nov. Caled. p. 87. 

 V. aspistea, Nyl. Pyren. p. 43 (non. Ach.). 

 Pyrenula lihricola, Fee Ess. Suppl. p. 83. 



Socotra. Ad ramos. Schweinf. 



Distrib. Cosmopolitan in tropical and subtropical regions. 



6. POLYBLASTIA. 



Pohjhlastia, Th. Fries, Polybl. 8. 

 Polyblastia, Mass. pr. p., Korb. pr. p. 

 Verrucaria, Nyl. pr. p. 



This genus has many species in Europe, but few in the warmer regions. 



P. tropica, Miill. Arg. in Proc. Eoy. Soc. Edin. xi. (1882), 471. 



Thallus cum cellulis corticis confusus, maculam albescentem efficiens, effusus ; apotbecia nuda 

 v. basi albo-velata, depresso-hemisphserica, in sectione basi fere £ mm. lata, -^q-\ mm. alta, 

 atra, superne nitidula, demum vertice poro pertusa, peritbecium dimidiatum, basi circum- 

 circa incurvatum et simul extrorsum subattenuatum, basi sub nucleo undique deBciens ; 

 nucleus vitreo-hyalinus, superne tamen pallide olivaceus, hypothecium byalinum, asci 

 3-4-spori; sporee oblongato-ellipsoideee (byalinae), 25-28 /m longee, circ. 10 /n latse, 6-8- 

 loculares, loculi 2-4-locellati. 



Apotbecia ut in P. sericea, Mass., sed sporee in ascis paucae. 



Socotra. Corticola ad ramulos. B.C.S. n. 1465. 

 Distrib. Endemic. 



7. BATHELIUM. 



Bathelium, Ach. Meth. Ill, t. 8, f. 3 ; Trev. Synops. gen. Trypeth. 21. 

 Trypethelium, Nyl. pr. p. 



A tropical genus with a few species, having the structure of the fructifica- 

 tion as in Trypethelium combined with hyaline and parenchymatous spores. 

 Our species are new and endemic. 



1. B. pauperrimum, Miill. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 471. 



Thallus hypophloeodes, gonidia fere globosa et parva, plus minusve seriato-concatenata ; peri- 

 thecia ab epidermide tecta, demum quasi poro ad verticem paullo denudata, solitaria v. 

 hinc inde pauca confluentia et tunc stroma minutulum fusco-nigricans distincte sed leviter 

 prominens formantia, vere dimidiata, depresso-hernisphserica, basi circumcirca ssepe acute 

 subproducta et epidermidem nigrantia, evoluta cum epidermide nigra, desupra visa ^-| mm. 



