BY JOHN SHIRLEY, B SC. 



195 



Section I. — Eugraphidea?, Mull. Arg. 



Apothecia scattered OYer the thallus, Dot collected in 

 stromata. 



Cohort A. Apothecia with margin duplex or simple ; spores 

 resembling those of Opegrapha, transversely divided,, loculi 

 cylindrical, not lentiform. 



VL — Opegrapha, Ach. 



Apothecia with proper simple margin, paraphyses connected, 

 spores fuscous or hyaline. 



* Spores brown — Melanographa, Mull. Arg. 



1. O. intrusa, Stirton. 



Parasitic upon the thallus and apothecia of Verrucaria 

 circumrnbens ; apothecia black, sub-prominent, small, oblong, 

 ••4 — *8 m.m., fissured epithecium here and there widening ; 

 spores 4, rarely 2, black-brown, uniseptate, with centre 

 constricted, oblong, "016 — -018 x -007 — '009 m.m. ; para- 

 Sn. physes few, thin, irregular, apices black or blue-black ; 

 hypothecium colourless ; hym. gel. with iodine light wine-red 

 or almost uncoloured, 



Hab % — Brisbane. Dr. Stirton, Proc. Roy. Soc. Vict. Sept. 

 1880. 



2. O. leucinia, Mull. Arg. 



Thallus whitish or yellowish-white, effuse, thin, smoothish ; 

 apothecia from orbicular to elongate, sessile, -2 m.m. wide, 

 often 1-5 — 2 m.m. long, the longer ones straight or variously 

 curved, simple or sparingly ramose : perithecium black, 

 M. entire, with thick base, margins black, apex and exterior 

 nude, above subdivergent ; epithecium narrow, covered by a 

 thick white stratum : spores 8, fusee >cent, -018 — '21 x 

 •0065 m.m., digitiform. st both ends obtuse, straight, 

 3-septate, at the dissepiments slightly constricted* 

 Bab. — Toowoomba, on bark. 

 Lich. Beit. v. Dr. J. Mailer, XVI. 15. 



