771 



or belovv the sea level at middle height of the water (0). The beach, 

 which is represented by the distance between the two horizontal lines, 

 is soniewhat enlarged, in order to make it more distinct. The vertical 

 lines indicate the level at which each algæ-forniation and association 

 mostly occurs, the dottcd parts of the lines that they may be found 

 beyond this level, though more scattered. 



The nunibers above the vertical lines indicate as foUows: 



1. HildenbraiuUa-Formation with lichens. 



2. Chlorophyceæ-Formation on exposed coast. 



Prasiola cr/spa-Association. i?/j/zoc/onåzm-Association. Enteromorpha- 

 Association. Pixisiola stipitata-As^ociation. 



3. Po/'pAi/ra-Association. 



4. /?/jodoc/?or/on-Association. 



5. Bangia- Urospora Association. 



6. Fucac^æ-Formation on exposed coast. 



Fiiciis spiralis-AssocmXion. Fiiciis m/Za/us-Association. 



7. Ca//;7/jam/HO/j-Association. 



8. i?/jorfymen/a-Association. 



9. The littoral Co/-a////ja-Formation. 



10. Monos/;-oma-G/-efH7/c /-Association. 1 ^, „ ■ ^- u 

 .. , • , • r, ; • L • i • +• These four associations be- 



11. Acrosinhonia-Polijsiphonia-AssociaUon. , ^ xi i-x^ i /- ; 

 .„ ^. ;. . ... long to the littoral Coral- 



12. Giqa rtina- Asaociahon ,. °^ 



.o TT ,/;•*•♦• /z;jrt-Formation. 



13. //zmo/7//jo//a-Association. | 



1 4. Phynuitolithon- Association. 



15. The sublittoral Co/'a//ma-Formation. 



16. Laminaria dia itata- Associaiion ] r • ■ 



• ^ ,, . . ... Lamznanaceæ-t' ormation 



17. A/arza-Association. 



18. Laminaria hy per bo rea- Associaiion ) °" exposed coast. 



19. Z)esmorcs//a-Association on exposed coast. 



20. Lz7/jode/-ma-Association. 



21. The sublittoral HoWrfeæ-Formation. 



22. C/i/o/op/zz/ceæ-Formation on sheltered coast. 

 Fn/eromo/yj/ia-Association. 



23. Fucaceæ-Formation on sheltered coast. 



Pe/z'e//a-Association. Fiiciis vesiciilosus-Ascophylliim-Associalion. Fu- 

 ciis inflatas-Associaiion. 



24. S/zc/yos/p/io/j-Association. 



25. Monostroma-Enteromorpha-Associaiion. 



26. //a//rfrr/s-Association. 



27. Lam manoceæ- P'ormation on sheltered coast. 



Laminaria /ceroe/isw-Association. Laminaria hyperborea- Association. 



28. Desmaresfm-Association on sheltered coast. 

 (29. Zostera-Associatioij.) 



Lastly, it should be pointed out, that the heights refer to the coast 

 as a whole, not to any special locality; thus the space within which an 

 association may be found is represented larger than would be the case 

 if we examined any single locality. 



