388 



ERNST 0STRUP 



As regards the universal distribution, it appears from the above 

 list, that the Icelandic coastal flora, as far as the Diatoms are con- 

 cerned, has a predominant Europeen character, but about one half 

 of the European species can also occur in colder seas. The list 

 of the distribution of the Diatoms in the different parts of the coast 

 shows, that out of 209 species found in the samples, 145 or 69% 

 were found in S.W., 101 or 48% in N.W., 92 or 44% in N., 87 or 

 42 % in S. and 64 or 31 % in E. The Diatom-life therefore is 

 most abundant on the South- West coast. 



List of the species found in more than 50 samples. 



Not considering N. W. in the above list, which, owing to the small 

 number of samples, gives a misleading percentage, it appears, that, 

 of the frequently occurring species, the following are especially 

 prominent: 



in S. (with more than 50%): Rhabd. arc. (66 %), Rhabd. minut. 

 (60 %), Gramtph. marina (53 %). 



