SCHEME OF THE ARRANGEMENT. 
Series A. Apothecia variously colored, not black. 
Spores 2 rarely 3 locular. 
f Apoth. lighter colored. Species 1-6. 
t Apoth. darker colored. Species 7-20. 
Spores 4-plurilocular. 
t Apoth. whitish or pale yellow. Species 21-40. 
ft Apoth. crimson, or violet brown, or purple. Species 41-47. 
ftt Apoth. yellow, or cinnamon colored, or brown or reddish- 
brown, often blackening. Species 48-120. 
* Spores muriform. 
f Apoth. pale. Species 121-129. 
ft Apoth. yellow. Species 130-131. 
ftf Apoth. crimson, or red, or purple. Species 132-135. 
tfft Apoth. brown, and now blackening. Species 136-143. 
Series B. Apothecia black. 
* Spores 2 rarely 3 locular. 
f Apoth. rounded, more or less lecideiform. 
a Thallus glebous-squamose. Species 144. 
b Thallus uniform. 
X Growing on rocks, earth, or decayed vegetation. 
Species 145-153. 
H Growing on bark, dead wood, or leaves. Species 
154-179- 
ff Apoth. from rounded, more or less elongated or stel¬ 
late, or irregular. Species 180-197. 
fff Parasitic species, spores 2 locular. Species 198-214. 
** Spores 4-8 locular. 
f Apoth. rounded, or oblong, or angular, 
f Growing on rocks. Species 215-219. 
ft Growing on bark or dead wood. Species 220-260. 
ft Apoth. becoming linear or stellate. Species 261-295. 
*** Spores 8-plurilocular. Species 296-303. 
*** Parasitic species, the spores 4-locular. Species 304-306. 
*** Spores muriform. Species 307-348. 
