BY JOHN SHIRLEY, B.SC. 



9 



pertusarioid, endospore pale yellow and separated from the 

 epispore by a broad hyaline margin, external envelope blue 

 with I. ; -02— 033 x -008— -019 m.m. Readily separated 

 from any other Parmelia by the size and thick coat of its 

 spores. 



Syn. — P, glaberrima, Krcmp. P. perlata v. latissima, Mnt. 

 P. cetrarioides, Del. P. saccatiloba, Tayl. 



9. P. platycarpa, Stirton. 



Thallus flavescent or pallid cervine-flavescent, membranace- 

 ous, widely spread (K yellowish), somewhat rugulose or here 

 and there smooth, lobate-laciniate, lacinire with crenate 

 incised margins or very often lacerate-dissect ; beneath black, 

 partly naked or in part covered with black rhizinaa ; medulla 

 white (K yellowish). Apotheeia large (10 — 30 m.m.) 

 Sn. badio-rufous, receptaculum sessile or often subpedicellate, its 

 surface rugulose or foveolate-impressed. Spores 8, colourless, 

 epispore thick -03 — -037 x -012 — *02 m.m. ; paraphyses 

 not distinct, emhe Id^d in firm gelatine. Hym. gel. with I 

 caulescent. Spermagonia black without ; spermatia 

 straight, cylindrical, about -006 x *0006 m.m. " I consider 

 this distinct from P. latissima, Fee, in all its forms." Dr. 

 S. Scot. Nat., April, 1878. 



Hab. — On bark near Brisbane. 



%%* Medulla white (K yellow, then red). f 



10. P. perforata, Ach. 



Thallus orbicular, glaucous-green or white, drying a dull 

 brownish colour, membranaceous, surface minutely reticulate- 

 rimulose, sinuate-lobate, margins slightly recurved and 

 fringed with black cilia, often albo-sorediate, beneath soot- 

 black and rough Apotheeia to 12 m.m in diameter, 

 Sn. margin entire, disk clay-red or red-brown, concave, deep, at 

 length perforate. Spores oval-oblong, simple, colourless, 

 with doable contour in maturity, -011 m.m. long, *0075 m.m. 

 broad. , Spermagonia as black specks, chiefly in the intra- 



+ It is not to be understood that these chemical reactions are absent from Nos. 1-9 

 for which other distinguishing characteristics are supplied. 



