THE BRYOPHYTA OF ICELAND 



645 



coastal districts, and on the lo\v land with the neighbouring heights. 

 The high land of the interior, which is about 90,000 km 2 , in dimen- 

 sion and, usually, 600 1000 metres in height, is from a botanical 

 point of view practically unknown. Outside the Jokulls it consists 

 almost everywhere of gravelly flats which are practically bare of 

 vegetation. According to Thoroddsen, however, there are in some 

 places extensive mountain -bogs, but the Bryophyte vegetation of 

 these is quite unknown. 



Table IV. The Frequency of the Species in the different Districts 



of Iceland. 



