The Sea Shore: With 61 Colour Photos. by D. P. Wilson and Others, 62 Black-and-white Photos. and 88 Text Figures |
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Page 110
... muscle mantle cavity remains of antennae providing cement for attachment FIG . 31 - Vertical section through an acorn - barnacle . The animal is withdrawn into the mantle cavity by contraction of the depressor muscles attached to the ...
... muscle mantle cavity remains of antennae providing cement for attachment FIG . 31 - Vertical section through an acorn - barnacle . The animal is withdrawn into the mantle cavity by contraction of the depressor muscles attached to the ...
Page 133
... muscle and a small anterior one . In a typical bivalve , such as a cockle , the animal is more symmetrical and the two muscles of about equal size . The simplest bivalves to possess a byssus are symmetrical , with the hinge in the ...
... muscle and a small anterior one . In a typical bivalve , such as a cockle , the animal is more symmetrical and the two muscles of about equal size . The simplest bivalves to possess a byssus are symmetrical , with the hinge in the ...
Page 236
... muscles make periodic contractions which reduce the volume of the gill cavity and force out this excess material . Such minor muscular contractions for cleansing the gill chamber occur in all bivalves , although less frequently in the ...
... muscles make periodic contractions which reduce the volume of the gill cavity and force out this excess material . Such minor muscular contractions for cleansing the gill chamber occur in all bivalves , although less frequently in the ...
Contents
INTRODUCTION | 1 |
THE DISCOVERY OF THE SEA SHORE | 7 |
THE INHABITANTS OF THE SHORE | 15 |
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acorn-barnacle algae amphipod anemones animals and plants Ascophyllum attached balanoides barnacles bivalves body bottom British burrow byssus Chthamalus coasts cockles colour common common periwinkle commonest crabs crustaceans D. P. Wilson dog-whelks eggs encrusting estuaries exposed exposure extend fauna feeding fish foot fresh water fronds Fucus gills grow growth habit hydroids inches long inhabitants intertidal isopod jellyfish Laminaria larger larvae limpets live low tide low water marine molluscs mouth movement muscles mussels nature numbers oyster periwinkles Photographed under water plankton polyzoans population prawns protection ragworms razor-shells red weeds region rock pools rocky shores rough periwinkle rounded salinity sand sandy shores sea-squirts seaweeds shallow shell valves shelter shipworms shore animals shown in Plate shrimps siphons snails spawning species spines sponges spring tides squat lobsters starfish sub-littoral sub-littoral zone surface swimming temperature tentacles tidal tide marks top-shells tube tube-worms usually wide worms wrack young