LIST OF ILLUSTRATIONS xv 



FACING PAGES 



Chaloptevus varipedatus . 89 



Sabella Pavonia ......... 89 



Lanice conchelegia 89 



Lophopus : a fresh-water Polysoa . ... . .92 



Plumatella repens ......... 92 



Argonaut or Paper Nautilus (Argonauta ay go) 93 



Nautilus pompilius, the Pearly Nautilus 93 



Octopus Vulgaris ......... .96 



Octopus (Eledon) attacking a Crab 96 



Sepia elegans stranded ........ 97 



Sepiola atlantica . . .. . . . . 97 



Cuttlefish swimming 98 



Cuttlefish resting ......... 98 



LimncB Stagnalis and two shells of Planorbis .... 99 



Univalves, showing right- and left-handed spirals . . . 99 

 Studies of the Whelk expanding its foot . . . .102 



The Ormer (inner surface of shell) . . . . .103 



A chain of Slipper Limpets 103 



Razor-shell or Solen with foot extended . . . . 106 



Aplysia, the " Sea-Hare " 106 



Queen Scallops with Serpula tubes upon their shells . . 107 

 Scallops opening their shells, and showing the fringe of the mantle 107 



A Starfish forcing open an Oyster 112 



A Whelk boring through the shell of an Oyster . . .112 

 The Great Swan Mussel . . . . . . .113 



The Prickly Cockle . , . . . . . .113 



Zoaea stage of Porcellana sp . .116 



Megalopa stage of Carcinus sp. . . . . . .116 



The Great or Edible Crab . . . . . . .117 



Male and female Masked Crabs . . . . . .117 



MacYopodia rostratus . . . . . . . .118 



Inachus dorsettensis . . . . . . ..118 



"Dressed" Spider Crabs 119 



The Spiny Spider Crab 119 



Female Velvet Fiddler Crab, with eggs 120 



