THE BKYOPHYTA OF ICELAND 



661 



Table VI. Collective Survey of the Number of Species 

 in the different Districts of Iceland. 



By comparing the Tables and Lists of species contained in the 

 present section it is seen that: — 



The Meridional species belong mainly to the southern part 

 of Iceland, in the south-western part of which they arrive at their 

 niaximum, both as regards number and frequency, and from thence 

 decrease in number and frequency towards north-west and east. In 

 south-east Iceland there is a tolerably sharp limit for their distri- 

 bution, whilst a great number of species are to be found — but 

 with decreasing frequency — even throughout the whole of West 

 Iceland. The respective percentages of the entire number of species 

 are as follows: — South Iceland 19%; East Iceland 6%; North 

 Iceland 9 %; North-west Iceland 5 % and West Iceland 12 %. A 

 comparatively great number of species have been found in a single 

 locality, or in a few localities, in North Iceland, especially around 

 Eyjafjordur and eastwards in the valleys towards M\ vatn, which may 

 l)robably be due to the higher summer temperature of these districts. 



