CONTENTS. 



Preface 683 



Introduction 683 



I. On the external conditions affecting tlie algal vegetation on the Faeroese coasts 687 



1. Climatic and hydrographic conditions 687 



a. Temperature and salinity of the sea 687 



b. Tides. Oceanic currents 691 



c. Action of the waves. Exposed coasts ; sheltered coasts 693 



d. Temperature and humidity of the air 698 



e. Light 699 



2. Nature of the coast 705 



II. Algae-regions and algae-formations on the coasts of the Faeroes 707 



1. The littoral region 708 



a. Exposed coasts 711 



b. Sheltered coasts 742 



2. The sublittoral region 748 



a. Exposed coasts 750 



b. Sheltered coasts 762 



3. The lower limit of the algae-vegetation. The elittoral region 768 



III. General character of the algae-vegetation 769 



IV. The phyto-geographical position of the algae-ttora of the F'aeroes 773 



1. The constituent parts of the Faeroese algae-flora 773 



2. Comparison with the adjacent countries . 781 



3. Floristic differences in the marine algae-flora of the F'aeroes 804 



4. The origin of the marine algae-flora of the Fieroes 805 



V. Some biological observations 825 



Duration of life. Perennial, annual and short-lived species 826 



The period and conditions of growth and time of fructification 828 



Index to literature 831 



