INDEX TO THE GENERA. 
PAGE 
Acarospora ........+ 43 Hime age sfisse 
Acrocordia ......... 71 | Lonaspis «+0... 
Alectoria <........25. 29 
Arthonia ............ 67 | Lecanactis ......... 
heels hs wehbe 72 | Lecanora..... 
AspieiBa. ....éhe.ss 41 | Lecidea ............ 
Leciographa 
TIRGMIOD sis cochas ces 64 | Leprocaulon ...... 
OMYCOE .- 0005 ees 46 | Leproloma ......... 
Biatorella ......... 61 es oe en Jombreess 
Biatorin 61 | Leptogium ......... 
BEMIS oe scesvocsis 62 ee Wetens 
Botrydina ......... 7 
Buellia 64 Litlwevaplis eee 
ObATIB. s....de0s0e- 
Calicigm ..s.scsesces 27 | Lobarin 
Callopisma ......... 3 opadium ........+ 
CObrATIA ...iecvesies 30 | Lophothelium...... 
3 ee oe Oe 51 
Cladonia ........... 47 | Megalospora ...... 
Coccocarpia......... 26 | Melanotheca ...... 
Coenogonium ...... 52 | Melaspilea ......... 
TOE. crdc dives 20 | Microglena......... 
Collemodium ...... 21 | Microthelia......... 
Collemopsis......... 22 | Mycoporum ...... 
Coniocybe ......... 27 
Coriscium ......... 68 | Nephromium ...... 
Cyphelium ......... 27 | Normandina ...... 
Dacampia ......... 69 | Obryzum 
fe eens: 22 Opegrapha ieevaniews 
Dermatocarpon ... 69 
PODNODS: siskccis. 50s 19 anita eviivnnes 
MBUODOIE © vekicseysces 19 OU sesinie esses 
EVGrOie  sessescascns 31 | Parmeliopsis ...... 
GUAR as. cssevess 
Gonionema......... 19 | Peltigera ............ 
Graphina............ 68 | Pertusaria ......... 
PUNE cscisiidiee 68 | Pheographis ...... 
VALECEA wrecerescece 52 | Phialopsis ......... 
Gyrtnihien easbieabe 45 FVONS: ossteserace 
YECAR dvsscecseser 
Hematomma.. 37 Pilophorus . sbideuecs 
Homodium ......... 21 | Placodium ......... 
PAGE 
BLYSINA...cereceee. 30 
Polyblastia ......... 70 
lychidium . 21 
Porina 72 
BONOIAN vsse0s -cauet 35 
Pterygium ......... 20 
Ptychographa...... 67 
Pycnothelia ...... 47 
Pyreniococcus 69 
Pyrenopsis ......... 19 
'yre 73 
Racodinm 2.5.4: 52 
Ramalina ......... 28 
Rhizocarpon ...... 65 
Ricasolia........... 238 
Rimodina 3.68 6c.4s 41 
Schizoma ......... 20 
Sirosiphon ......... 73 
MOlGEINE 52.5.5 .000% 24 
Spherophorus 28 
hinctrina oF 
Spilonema ......... 19 
UAIIATIO vi sescers 35 
Staurothele......... 71 
Stenocybe ......... 27 
cerracenalin canes 46 
SHCUDS cain. 22 
encehalla ie es oe 
Thamnolia ......... 62 
Thelidium ......... 70 
4 012) (0) 031 73 
Thelotrema......... 45 
ie cae dear 45 
ies ctescanectes 29 
Valens prec 70 
tHOVIG.  ..cccccn ae 
Xylographa......... 67 
