779 



predominate in tlie northern countries both in growth^ and in 

 nuniber of species (see Rosenvinge's table 71, p. 174); whether 

 the same mav be said of tiie Chlorophyceæ , as the table above 

 seems to indicate, appears to me, bowever, rather doubtful. At any 

 rate they are very numerous in the littoral and the upper sublit- 

 toral regions of the West-Indies and seemingly predominate there^. 

 After these remarks we may consider how the Færoese species 

 are grouped in the above- mentioned five groups. We liave the 

 following result: 



O arctic species or O °/o 



70 subarctic species or ... . 32.55 Vo 



27 boreal-arctic - - 12.55 Vo 



89 cold-boreal - - .... 41.4 % 



29 warm-boreal - - 13.5 »/o 



It is clear from this table that the cold-boreal species are in 

 the majority in the Færoes, as not far from one half of the Færoese 

 algæ belongs to this group. Next to that come the subarctic species, 

 including nearly one third of all the Færoese algæ. Of species oc- 

 curring in more southern regions, the warm-boreal species, the 

 Færoes have a little more than 13*^/o; almost the same number of 

 species must be referred to the boreal-arctic group, which is, bow- 

 ever, of less interest from this point of view, as all these species 

 are widely spread and often ubiquitous, and at any rate common 

 in all five groups. 



If we leave the Chlorophyceæ and Cyanophyceæ out of consi- 

 deration, as they possibly make the result less reliable, the result 

 is nevertheless much the same. 156 red and brown algæ in all are 

 found at the Færoes; that is: 



45 subarctic species or 28.9 Vo 



17 boreal-arctic - - 10.9 % 



74 cold-boreal - - 47.4 Vo 



20 warm-boreal - - 12.8% 



In order to show more plainly in which of the surrounding 

 countries we meet witli an algæ-flora having a composition very 

 closely connected to that of the Færoes, and to demonstrate the 



^ Cf. Kjell man, F". R., Ur polarvaxternes Hf (Nordenskiold, Studier och Forsk- 

 ningar, p. 544). 



* Cf. Kjellman, F. R., 1. c. p. 540 where he saj^s: »Ett utmårkande drag for 

 algvegetationen i Ishafvet år fattigdomen på grona alger«. 



Botany of the Færoes. 50 



