771 



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

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

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

 lines indicate the level at which each algae-formation and association 

 mostl}' occurs, the dotted parts of the lines that they may be found 

 beyond this level, though more scattered. 



The numbers above the vertical lines indicate as follows: 



1. Hildeiibrandia-Fovn^aiion with lichens. 



2. Chlorophycece-Formaiion on exposed coast. 



Prasiola cWspa-Association. i?/jzzoc/o/2/zzm-Association. Enteromorpha- 

 Association. Prasiola stipitata- Associaiion. 



3. Po/'p/zz/ra-Association. 



4. i?7zoc?oc/ior/o/2-Association. 



5. Bangia- Urospora Association. 



6. FzzcaceoE-Formation on exposed coast. 



Fiiciis spz>a/zs-Association. Fiiciis z/z/Za/zzs-Association. 



7. Ca//z7/zam7zzo/z-Association. 



8. /?/zo(:iz/nze/zza-Association. 



9. The littoral Cora //z'na-Formation. 



10. Monostroma-Grevillei-Associaiion. ) 



11. Acrosiphonia-Polysiphonia-Associai'ion. , , , ,. , ^ , 



12. Gz^ar/zVza-Association | ^^"g ^^ the littoral Coral 



These four associations be- 

 long to the litt 



13. //z77za/z//za/za-Association. ■ /'^«-Formation. 



1 4. Phymatolithon-Associaiion. 



15. The sublittoral Cora//z/za-Formation. 



16. Laminaria dig itata- Associaiion ] 



17. A/arza-Association. Lamz/zarzacecE-Formation 



18. Laminaria hype rborea- Associaiion \ ^^ exposed coast. 



19. Z)es/7zares/za-Association on exposed coast. 



20. Lz7/zoder/na-Association. 



21. The sublittoral F/orz'deoe-Formation. 



22. C/z/o/-o/?/zz/cece-Formation on sheltered coast. 

 £'/z/'eromorp/za-x\ssociation. 



23. i^zzcacece-Formation on sheltered coast. 



Pe/z;e/za-Association. Fucus vesiciilosus-Ascophy llum-Associaiion. Fu- 

 cus inflatas-Associaiion. 



24. S/zc/z/osz/?/zo/z-Association. 



25. Monostroma-Enteromorpha-Associaiion. 



26. //a/z'rfrz/s-Association. 



27. Lamz/za/'zaceoe-Formation on sheltered coast. 



Laminaria fceroensis-Associaiion. Laminaria hype rborea- Associaiion. 



28. Z)esmaresfza-Association on sheltered coast. 

 (29. Zos/era-Association.) 



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

 as a whole, not to any special localit}^; thus the space within which an 

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

 if we examined any single locality. 



