LICHENES — DR JEAN MULLER. 379 



6. PH^EOGRAPHINA. 



Phceographina, Mull. Arg. L. B. n. 476. 

 Graphis, Auct. pr. p. 



A large genus of tropical and subtropical regions, containing remarkable 

 plants for this tribe. 



P. Balfourii, Mull. Arg. 



Graphina Balfourii, Mull. Arg. in Proc. Eoy. Soc. Edin. xi. (1882), 467. 



Thallus giganteus, cresse corticiiformis, 2-3 v. hinc inde usque 5 mm. crassus, abrupte limitatus, 

 omnino continuus et laevis, hinc inde bullatim gibbosus et per plagulas sat amplas pro 

 genere eximie crassas secedens, supra obscure argillaceus v. argillaceo-nigricans, intus 

 albido-v. flavescenti-argillaceus, totus coriaceo-fragilis. Apothecia 8-12 mm. longa, 

 • radiatim divisa, radiis bifurcafcis v. integris, immersa et crassiuscule thallino-tecta, labiis 

 thallinis discum tegentibus modice emergentibus, siccis conniventi-clausis sed sulcum in 

 sectione obtuse triangularem relinquentibus, madefactis discum rufo-fuscum nonnihil 

 detegentibus, non suloatis ; perithecium proprium \ mm. latum (in sectione), rufescens, 

 versus mediam altitudinem sensim evanescens, inferne undique nullum ; lamina evoluta 

 y^ mm. alta, undique hyalina ; paraphyses subparallelas, connexse. Asci 1-spori. Sporae 

 hyalinse, demum fuscescentes, circ. 190 jm. longae, 50-60 /x latfe, oblongato-ellipsoideae, 

 utrinque rotundato-obtusse, copiosissime parenchymatice divisae, locelli in quaque serie 

 transversali siti circ. 8-12. 



Species quam maxime insignis, habitu et affinitate ad Phceographinam coluhrosam, Miill. 

 Arg. (Graphidem coluhrosam, Nyl. in Prodr. Nov. Granat. p. 564, cnjus margines proprii 

 sulcati et thallus alius), et Phmographinam contextam, Miill. Arg. (Graphidem contextam, 

 Nyl. Syn. Lich. Nov. Caledon. p. 81, cujus sporae pluries minores) accedit. 



Socotra. Truncicola. B.C.S. nn. 1423, 1430. 

 Distrib. Endemic. 



7. GRAPHINA. 



Graphina, Mull. Arg. L. B. n. 143 et 476. 

 Graphis, Auct. pr. p. 



A pretty genus with numerous species, which are nearly all tropical. 



1. Gr. varians, Mull. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 468. 



Thallus tenuis, albus v. albescens, sublaevis, obsolete farinosus, linea nigra limitatus. Apothecia 

 oblongato-ellipsoidea, circ. \-h mm. lata, longitudine diametrum sesqui-duplo triplove 

 oequantia, turgida, primum emergentia et lateraliter spurie thallodice vestita, dein emerso 

 sessilia et denudata, recta v. flexuoso-curvata, utrinque obtusa, angustius v. latius rimali- 

 aperta, margines valde tumidi et tereti-obtusi, haud sulcati, nigri ; discus primum intense 

 albo-pruinosus, demum denudatus, angustus et inter margines depressus ; perithecium 

 lateraliter tota altitudine crassum, basi deficiens et ibique hypothecio tenui v. hinc inde 



