Vlii CONTENTS. 



Page 



Beak and Ink -bag. Belcmnite. Its Carnivorous Habits 18G 



Argonaut, or Paper Nautilus 187 



Poetic Descriptions of it. Its Nautical Powers fabulous. Its real 



Movements, and the true Functions of the Supposed Sails 138 



Octopus. Its Arms. Suckers 189 



Powers of Attack and Escape. Change of Colour Ink of the 



Cuttle-fish. Its flesh used as Food 190 



Value as Bait. Numbers. Gigantic Cuttle-fish. Ova 191 



Fossil Remains. Geological Importance of the Mollusca 192 



Recent Investigations on the Microscopic Structure of Shell 193 



Mollusca and Radiata of the jftgean Sea. Regions of Depth 193 



Philosophy of the Study 194 



