LICHENES — DR. JEAN MtjLLEE. 363 



Socotra. Parcissime lecta. B.C.S. n. 1378 pro parte 

 Distrib. Territory of Niam Niam in Central Africa 



4. R. granulans, Miill. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 461. 



Thallus crebre granulari-areolatus, albus vel cinerascenti-albus, areolae valde exiguae, angulosae~ 

 convexae, laeves, centro monocarpicae aut steriles. Apotbecia \-\ mm. taatum lata, immersa, 

 vertice haud ernergentia et ipsa areolata albo-marginata; discus fuscus v. atrofuscus, nudus, 

 planus; epithecium olivaceo-fuscum; lamina byalina; bypothecium e fuscescente hyaiinum. 

 Sporae octonse (fnseae, biloculaves), 11-12 /x longae, 5-6 /j. latae. 



Species valde minutula, primo intuitu crustam granularem sterilem simulans. 



Socotra. Ad saxa calcarea. B.C.S. n. 1355 pro parte. 

 Distrib. Endemic. 



4. URCEOLARIA. 



Urceolaria, Nyl. Essai 180; Miill. Arg. Licb. Geneve 49; Stitzb. Beitr 168; Tuck. Gen. 133 

 A small genus with widely dispersed species. 



U. actinostoma, Schser. Enum. p. 87. 



Socotra. Ad saxa quartzosa supra Wadi Digal, alt. 550 m. Schweinf. 

 Distrib. Europe, Texas, Brazil, Paraguay, Teneriffe, Cape of Good Hope 

 Egypt, East India, and China. 



5. PERTUSARIA. 



Pertusaria, PC. Fl. Fr. ii. p. 319; Duby Bot. Gall. 672; Scbter. Enum. 226; Nyl. Essai 180; 

 Stitzb. Beitr. 167; Tuck. Gen. 126. 



This genus is represented in all countries. The Socotra lichen-flora shows 

 a series of seven tropical species, of which five are new and endemic. 



1. P. cicatricosa, Miill. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 461. 



P. communis var. neocaledonica, Nyl. Syn. Lich. Nov. Caledon. p. 31. 



Tballus mediocris, albidus v. flavescenti-albidus, rugulosus, ceeterum continuus, non linea 

 hypotballina distiucta cinctus. Verruca? fertiles 1-3-carpicae, leviter bemispbaericse, 

 gibboso-subirregulares, vertice saepe depressse, extus undique leviter cicatricoso-foveolatae ; 

 ostiola pallida, tarde uigrescentia, modice depressa. Asci (l-)2-spori. Sporae oblongato- 

 ellipsoideae, 110-160 /j. longae, 45-60 /j. latae, intus valide subreticulatim costatae. 



A proxima P. communi differt superficie cicatricoso-subfoveolata fructuum. 



Socotra. B.C.S. n. 1357 pro parte. In ramis Balsamodendri supra Wadi 

 Digal, alt. 200 m. Schweinf. 

 Distrib. Endemic. 



