BY JOHN SHIRLEY, BSC. 



189 



III- — Phasotrema, Mull. Arg. 

 Spores brown, transversely divided, locuii lentiform. 



1. P. expansum, C.K. (Shirley.) 



Thallus pale- brown, smooth, continuous, determinate, denned 

 by a narrow nigro-fuseous line. Apothecia not raised or 

 papillate ; 1 m.m. or more in diameter, margins distinct, 

 proper margin lacerate ; disk cinereous, finally black. Thecas 

 clavate-cylindrical ; spores oval-oblong, *025 — -035 x -005 

 K. — 007 m.m, 5-septate occasionaly 7-septate, daik-brown, at 

 either end obtuse; paraphyses capillary, discrete, with iodine 

 cloudy yellow-brown ; perithecium fuscescent. 

 Hab. — On bark of Plectronia barbata, West End. 



2. P. consimile, Mull. Arg. 



Thallus argillaceo -albescent, very thin, smooth or faintly 

 leprose ; apothecia hemispherical, 1 m.m. wide, concolorous 

 with the thallus or when moist of deeper shade, when young 

 tballine clo'hed, later on roseo-carneous, vertex obtuse, not 

 at all impressed, acutely or widely ostiolate ; ostiole -3 m.m., 

 M. entire ; proper perithecium fulvescent pallid : epithecium 

 velate-carneous ; lamina with epithecium subhyaline ; spores 

 8, fuscescent, at length intensely br wn, transversely 12-20 

 locular, fusiform, outline at first regular, afterwards between 

 the locuii cmstricto-unequal, -045 — '085 x 009 — -011 m.m. 

 Hab. — Russell River. 

 Lich, Beit, von Dr. J. M. XXVI. 21. , 



3. ;P. trypethelioides, C. K. (Shirley.) 



Thallus greenish, crowded with verrucas, thick, continuous, 

 the verrucas convex or hemispherical, solitary or several 

 aggregated. Apothecia one or several in each verruca, 

 common ostiolum minute, depressed, usually annulate, widely 

 expanded, at length deeply urceolate, disk white with prom- 

 K. inent margin ; proper excipulum thin, nigro-fuscous. Apo- 

 thecia within wholly carbonaceoui or densely atro-laminate, 

 lamina? erect ; paraphyses slender, not readily separating ; 

 spores in cylindrical asci, ovate, 3-septate, -015 x '008 m.m. 

 . Hab. — On bark, Southern Queensland. 



