64 



H. JONSSON 



Table 3. Red algae, Brown algae, Green algae, Blue-green algae 



collectively. 



Table 4. Red and Brown algae collectively. 



uniformly in the other parts of the coast, and is reduced to in 

 S. Iceland. In E., N., NW. and SW. Iceland the number of the 

 species in the subarctic group I is practically identical in propor- 

 tion to the number of species, taken as a whole, in these parts of 

 the coast; S. Iceland has a distinctly smaller number, only 10 /o. 

 The subarctic group II is represented most abundantly in NW. Ice- 

 land; E. and N. Iceland come next; but S. and SW. Iceland have 

 a considerably lower percentage (about 20 %). The percentage in 

 the boreal-arctic group is practically identical in all parts of the 

 coast. The cold-boreal group presents almost the same percentage 

 in E., N. and NW. Iceland, while the percentage in the group in 



