The Victorian naturalist . ongst these animals inthe midhttoral areas are a number oflimpets, the most striking of which isthe Variegated Limpet Cellanatramoserica. Another conspicuouslimpet-Hke gastropod is the air breath-ing Siphonaria diemenensis (Van Die-mens Land Siphon Shell). Both and S. diemenensis moveslowly over the rock surface grazingon encrusting algae. The lower sections of the midlit-toral zone are covered by either theserpuHd polychaete worm Galeolariacaespitosa or the brown alga Nep-tunes Necklace (Hormosira banksi).G. caespitosa forms encrusting massesof calcare
The Victorian naturalist . ongst these animals inthe midhttoral areas are a number oflimpets, the most striking of which isthe Variegated Limpet Cellanatramoserica. Another conspicuouslimpet-Hke gastropod is the air breath-ing Siphonaria diemenensis (Van Die-mens Land Siphon Shell). Both and S. diemenensis moveslowly over the rock surface grazingon encrusting algae. The lower sections of the midlit-toral zone are covered by either theserpuHd polychaete worm Galeolariacaespitosa or the brown alga Nep-tunes Necklace (Hormosira banksi).G. caespitosa forms encrusting massesof calcareous tubes on vertical rockfaces which are sheltered from directwave action (Figure 9). The massesof tubes provide many microhabitatswhich support a varied community ofcrabs, worms, molluscs and amphi-pods. The gently sloping areas are typi-cally covered by H. banksi and matsof coralline algae, Jania sp. TheTall Ribbed Limpet Patelloida alti-costata (Figure 8) is found in theseareas, feeding predominantly on The Infralittoral Fringe At Flinders this area is easilyrecognisable by the presence ofseveral species of Cystophora, a brownalga, and of the green alga Caulerpabrowni (Figure 10). Several animals occur among thesealgae, the most conspicuous being thepredatory Dog Winkle Dicathaisorbita (Phillips and Campbell, 1974).The Wavy Turbo Subninella undulata,and the chitons Poneroplax albida andP. costata are also common. Rock Rubble Areas The Flinders shore platform pos-sesses extensive areas of rock rubblewhich provide shelter for many ani-mals. These animals are also zonedbut not as conspicuously as on openrock surfaces. The most abundantanimals in the rock rubble are threespecies of grapsid crabs (Figure 11)which shelter under the boulders dur-ing low tide, and feed at high tide onalgal fragments. Paragrapsus quadri-dentatus (the notched shore crab)occurs in the lower midlittoral areaimmediately below Cyclograpsusgranulosus (the purple mottled shorecrab). These
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Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1884
