TUl CONTENTS. 



Page 



Bealc and Ink-bag. — Bclemnite. — Its Carnivorous Habits 186 



Argonaut, or Paper Nautilus 187 



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



Movements, and the true Functions of the Supposed Sails 188 



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 IMicroscopic Structure of Shell 193 



Mollusca and Kadiata of the Jigean Sea. — Regions of Depth 193 



Philosophy of the Study 194 



