526 PYBENULACEAE. 



3. PSEUDOPYliiiinJLA Muell. Arg. 

 1. Pseudopyrenula dlremta (Nyl.) Muell. Arg. Flora 66: 249. 1883. 

 Verrucaria diremta Nyl. Act. Soo. Sei. Penn. 7: 492. 1863. 

 On bark, New Providence : — ^Cuba ; Venezuela ; Colombia ; Brazil. 



4. PYRBKrUliA Aeh. 

 Peritbecia dimidiate. 



Perithecia spreading at tbe base and entirely nudate. 

 Peritbecia not spreading, immersed when young, then emergent. 

 Perithecia subglobose. 

 Tballus orange^brown. 

 Tballus more or less olivaceous. 



Peritbecia immersed in tbe tballus. 

 Peritbecia emergent to superficial. 



1. Pyrenula mamillana (Aeh.) Trev. Conspect. Verr. 13. 



Verrucaria mamillana Aoh. Meth. Licli. 120. 1803. 

 Verruoaria Santensis Tuck, apud Nyl. Expos. Pyren. 45. 

 Verrucaria Kunthii F§e, Essai Crypt. 88, pi. S4, f. 4. 

 Pyrenula Kunthii F§e, Suppl. Essai Crypt. 80. 1837. 

 Pyrenula deplanata Muell. Arg. Bot. Jahrb. 6: 411. 1885. 



On bark. Great Babama and New Providence : — widely distributed in tropical 

 and subtropical regions of botb bemispberes. 



Pyrenula mamillana is an exceedingly variable species. P. Kunthii is the form 

 with the larger perithecia and spores, that is the more luxuriant form ; while P. 

 deplanata is the less luxuriant form with tbe smaller perithecia and spores. But 

 intergradations of all sizes are to be found commonly. 



2. Pyrenula leucoplaca (WaUr.) Koerb. Syst. Lich. Germ. 361. 1855. 



Verrucaria leucoplaca Wallr. in Bluff and Fing. Fl. Germ. 3: 299. 1831. 



On bark of Casasia clusiaefolia. Little San Salvador ; — widely distributed in the 

 temperate regions of both hemispheres. 



3. Pyrenula eerina (Eschw.) Muell. Arg. Flora 67: 667. 1884. 



Verrucaria eerina Eschw. in Mart. PI. Bras. 1: 133. 1833. 

 Pyrenula Odiraniia^a Pee, Suppl. Essai Crypt. 82, pi. 37, f. 1. 1837. 



On bark, New Providence and Crooked Island; — widely distributed in tropical 

 America. 



4. Pyrenula punctella (Nyl.) Muell. Arg. Flora 65: 400. 1882. 



Verrucaria punctella Nyl. Expos. Pyren. 46. 1858. 



On bark of Drypetes, Cay north of wide opening, Exuma Chain: — South Caro- 

 lina ; Colombia ; Java. Probably generally distributed but confused with the well- 

 known Pyrenula nittda (Weig.) Ach., from which it differs in the more completely 

 immersed perithecia and the larger spores. 



5. Pyrenula Glaziovii Muell. Arg. Mem. Soc. Phys. Hist. Nat. Genfeve 30': 32. 



1888. 

 On bark. New Providence, along Soldier's Road : — Brazil. 



5. mCEOTHELIA Koerb. 



1. Microthelia ctuadrilocul^ta Eiddle, sp. nov. 



Thallus epiphloeodes crustaeeus uniformis effusus, albidus opacus, tenuis 

 rimulosus. Gonidia chroolepoidea. Perithecia Integra globosa, minuta ad 0.4 

 mm. lata, superficialia basi thallino-teota, superne nuda nitida, apiee convexo 

 aut minute umbilioato. Paraphyses persistentes distinetes ramoso-connexae. 

 Asci oblongi 8-spori. Sporae in aseis 2-3-seriales fuscae oblongae aut fusi- 

 formes, 4-loculare3 loculis oylindrieis, 18-20 X 6-7 |U. 



