LIST OF ILLUSTRATIONS 



Ska-Anemones, 

 Cephalopoda, 

 Land Molluscs, 

 ( 'tenophores, 

 Olass-Sponges, 

 Radiolarians, 



COLOURED PLATES 



Frontispiece 



Facing page 336 

 . 345 

 . 475 

 . 537 

 . 562 



TEXT ENGRAVINGS 



