CONTENTS. 
Page 
Introduchon re en Bee teens 2 a eele Sele Tee ae Tee ce eee ne RER 103 
IérherLichen, Florañof Iceland SS SEN ess sae VERRE 106 
II The Means of Propagation and Dispersal of the Iceland Lichens....... 130 
1112 The Biology ofithe/Lichensto@icelandé PPT EE Er ve SEE ECOLE PCR 137 
A MBATkMPICHENSE EC RME EE e's, ee s'ois ololoio tse ea lenin cle eerie toe 137 
25 SE pipliyllons LICRENS EPP PE ET cer aii Ener EREILEE RAGA 00 - 142 
3.. Earth. Lichens. 222,7... 20.000 le u plain om pu ssp cise Dr EEE 142 
A> Rocks Liehens sacri cise sie ea ee ie ee ECS RCE FL 156 
5. Synopsis of the chief Biological Conditions of the Lichens of Iceland 164 
IV The Classification of the Lichens into Associations ................... 172 
I-IBark-Eichen Association 2-5... lee > sers ELLE 172 
2 u The>Barth-lichen ’Associations =2...22......2 serine om ee. CC 2 SE 174 
a: Dhe Deserts :: 2.0.2: I seeuusnleale RE Eee ee EEE 182 
b: kichen-heaths.... 24-2... 2.22: Sec Palais ets tetale eye nun TEE 187 
CHHMoss-vegefatlons en Terre lee ee Eee ale ee Re el BIKE 187 
do The Grass Vegetation = 2... «u... secure 2 «45 cue Ceres ee 191 
Slendhleaths sa N Sop cote ee see els Bleue to phe lars het NR EEE 197 
bt LOGIN) UE RE er An AosCUGON OO bad lehrte ee Ne EEE 217 
3: Rock-lichen ASSOCIATIONS) 2... 2:2... 2 20 ee ee ee ee oe a 219 
As, Basalter. 22 ne een euere ne nie) Sunteusts ters ee Bee aera 219 
BEHEavyanı. rer ern ete 5 HOA Ae a Wein tee ehe ee LE EN EEE 224 
ied Wh A LE I SEES SEERE SEES ST TEE 227 
ds: Liparite.. ieterfere sente seen soeeeserertsesre ete oe 228 
V-The Vertical Distribution of the Bichens SS 20... 2... ver EL CRE 230 
VI The Abundance øf Lichens: int Iceland... osc. <5 = «11512 «torso ole dee oe 234 
