BY JOHN SHIRLEY, B.SC. 



135 



17. L. exigua Acli. 



Thallus orb'cular, granulated, whitish ash-coloured, thin, 

 unequal, sub-effuse. Apothecia clustered, with a thin some- 

 M. times crenulate border, black brown when moist, small. 

 Spores brown, 1-septate, ellipsoid ; spermagonia conoid ; arth- 

 rosterigmata with straight spermatia of various sizes. 



Hub. — On tre.s and rails. 



Syn. — L. sophodes v. exigua ; L. atra v. exigua Schaer. ; 

 Psora exigua Hepp. ; Rinodiua metabolica v. exigua 

 Kcerb. ; Rinodina exigua Mass. 



J | Spores 8, acicular, polyseptate — Ha3matomma Fr. 



18. L. punicea Ach. 



Thallus smooth, not shining, determinate, leprose, whitish or 

 grey or glaucous, bordered with black. Apothecia numerous, 

 crowded, in lines or in fours, or partly confluent and stellate ; 

 disk bright red, flat, or when old convex, appearing as if 

 simply embedded in the thalius ; margins indistinct, thin, 

 white, finally crenulate ; spores variable in size and shape, 

 Sn. 9-poly septate, 1'usiform-acicular, curved or sometimes listed, 

 & L. -0(5 x -0035 — 005 in. in. ; paraphyses with tips obscured by 

 brownish-red colouring matter. Near L. hsernatomina. 

 Dr. Knight in lit. F.M.B. says identical with L. Babbing- 

 tonii. 



Hab. — Common on bark of trees. 

 Syn. — Lecania punicea, Mull. Arg. 



19. L. Babbingtonii, Mass. 



Thallus pale grey with a greenish shade, roughened over 

 with minute papillae, leprose ; apothecia raised ; disk flat, 

 bright light red ; margins white, obscured in mature forms; 

 asci saccate or oblong ; spores linear, curved or subarcuatc 

 K. -029 — 035 x -0025 — -004 m.m., 5-septate, paraphyses not 

 readily separating, apices minutely granulose, not dilated. 



Hab. — Common on bark of tree f j in Brisbane scrubs. 



