VII. LICHENES. 
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Series F. PYRENODEI. Thallus various, peltate, scaly, areolate, con- 
tinuous or 0. Apothecia opening by a punctiform pore. 
Tribe XVI. Pyrenocarpei. 
41. Nobhandina. 42. Trypethelium. 43. Endocarpon. 44. Verrucaria. 
KEY TO FEE’S ARRANGEMENT OF THE GENERA. 
I. Thallus adherent, crustaceous, amorphous (of delicate matted filaments in Coenogonium 
and Byssocaulon). 
a. Apothecia more or less stipitate. 
Family I. Bseomyceee. Apothecia subglobose, fleshy, with a solid stipes. 
6. Basomyces. 
Family II. Calicioidese. Apothecia hollow, goblet-shaped. 
4. Calicium. 
ft. Apothecia sessile. 
Family III. Graphidese. Apothecia linear. 
34. Graphis; 35. Opegrapha; 36. Platygraphis ; 37. Plagiographis ; 38. 
STIGMATIDIUM ; 39. Arthonia; 40. Melaspilea. 
Family IV. Verrucariese. Apotheciu enclosed in tubercles of the thallus, with a 
small terminal opening. 
41. Normandina; 42. Trypethelium; 43. Endocarpon; 44. Verrucaria (see 
Thelotrema and Pertusaria in Family VII.). 
Family V. Leprarieae. Apothecia of naked sporules. 
This family consists of rudimentary states of various Lichens. 
Family VI. Variolariese. Apothecia opening into depressed hollow shields or 
pustules. 
Belongs to the same category as Family V. 
Family VII. Lecanoreae. Apothecia discoid with a more or less distinct border, 
sometimes thalline , and sometimes of the substance of the disk. 
a. Thallus crustaceous. 
27- Lecanora ; 28. Urceolaria ; 29. Pertusaria ; 30. Thelotrema ; 33. 
Lecidea. 
ft. Thallus of matted microscopic filaments. 
31. Cienogonium ; 32. Byssocaulon. 
II. Thallus subfoliaceous, consisting of scales more or less combined together. Apothecia 
discoid, bordered, sessile. 
Family VIII. Squamaria. 
21. Psoroma ; 22. Pannaria; 23. Coccocarpia; 24. Amphiloma ; 25. Squa- 
MARIA ; 26. PLACODIUM. 
III. Thallus shrubby or foliaceous, erect or horizontal, loosely attached by the base or by 
fibres from its lower suiface. 
A. Thallus horizontal, upper and under surfaces of different colour or texture, or both, 
a. Thallus not fixed by a central point, spreading diffusely. 
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