8 
Fucus serratus and Laurencia nybrida (between pools) 
Poot VEGETATION. 
Lithothamnion Lenormandi (abundant) 
Covallina officinalis (abundant) | 
Laurencia hybrida (abundant) 
L. pinnatifida (abundant) 
Cladophora rupestris (abundant) 
Himanthala lovea (abundant) 
Cladostephus spongiosus (abundant) 
Callithamnion arbuscula (abundant) 
Codium mucronatum (frequent) 
Ulva latissima (frequent) 
Rhodymema palmata (frequent) 
Griffithsia flosculosa (frequent) 
Leathesia difformis (frequent) 
ZONE 4 (Plate IV and V). 
The commonest species in this zone are :— 
Laminaria digitata (locally dominant) 
Himanthalia lorea (locally dominant) 
Fucus serratus (locally dominant) 
Rhodymenia palmata (locally dominant) 
Ceramium rubrum (on Cladostephus) (abundant) 
C. acanthonotum (abundant) 
Gelidium spp. (abundant) 
Callithamnion arbuscula (on Cladostephus or Coraliina) (abundant) 
Delesseria alata (abundant) 
Plumaria elegans (abundant) 
Chondrus crispus (abundant) 
Laurencia pinnatifida (abundant) 
Corallina officinalis (abundant) 
Cladophora rupestris (abundant) 
Cladostephus spongiosus (abundant) 
Rhodochoriton Rothii (frequent) 
Dasya arbuscula (frequent) 
Heterosiphonia plumosa (frequent) 
Polysiphoma urceolata (frequent) 
P. Brodiaei (frequent) 
Laminaria saccharina (frequent) 
Ectocarpus spp. (frequent) 
Elachista scutulata on Himanthalia (frequent) 
Sphacelaria cirrhosa (frequent) 
Gigartina stellata (frequent) 
Delesservia sanguinea (occasional) 
Nitophyllum vamosum (occasional) 
Halidrys siliquosa (occasional) 
Furcellaria fastigiata (occasional) 
Scytosiphon lomentarius (occasional) 
Lomentaria articulata (occasional) 
Chylocladia ovatus (occasional) 
