LIST OF PLATES 



PLATE TO FACE PAGE 



I. Colonies of the Tube-Worm {Sabellaria alveolata) at 

 BoRTH ....... Frontispiece 



II. (i) Typical Shore Forms : Barnacles, Dog-whelks, etc. 6 

 (ii) Typical Shore Forms .- Sea-urchin, Starfish, etc. 



III. (i) Typical Pelagic Forms: Ctenophores ... 8 

 (ii) Newly hatched Shrimps {Crangon vulgaris) 



IV. Typical Deep-sea Forms : Sea-lilies {Peniacrinus decorus) lo 



V. Zone of Fucus serraius, with Colonies of Sabellaria 



alveolata ......... 48 



VI. Arenicola Colonies on Sand-Flats of Dovey Estuary 50 



VII. Zoning of Dovey Estuary 52 



VIII. Zoning of Brown Seaweeds on Shore of Cove Bay, 



Kincardineshire 56 



IX. Enteromorpha Pool 66 



X. (i) Strands of Ascophyllum 82 



(ii) Laminarian Zone partly uncovered (Cove Bay, 

 Kincardineshire) 



XI. (i) Starfish regenerating Arms 124 



(ii) Male Starfish {Solaster endeca) spawning 



XII. (i) Timber bored by the Ship-worm (Teredo mrvegica) . 170 

 (ii) Timber bored by the Bivalve Xylophaga 



XIII. (i) Radula of Whelk 194 



(ii) Track of Sea-urchin on Plasticene 



XIV. (i) Common Shore Crab Parasitised by Sacculina . . 270 

 (ii) Megalopa Larv^ of Shore Crab 



XV. (i) The Cockle Industry at Leigh-on-Sea : Landing 



the Cockles 29S 



(ii) Cooking Cockles at Leigh-on-Sea 



XVI. Shore of Balloch Bay : (i) At Low Tide ; (ii) At Half- 

 tide 312 



xiii 



