VI 



CONTENTS. 



CHAPTER XII. 



ACEPHALA . . . 



Asiphonida . . . . 

 Mussel Fisheries . . . 

 Pearl Oyster Fisheries . 

 Oyster Fisheries and Parks 



CHAPTER XIII. 

 BRACHIOPODA . 



CHAPTER XIV. 



CEPHALA . 



Three classes of Cephala 

 i. GASTEROPODA 



Order I. Nucleo-branchiata 



,, 2. Opistho-branchiata 410 



CHAPTER XV. 

 Order 3. Pulmonifera . 



CHAPTER XVI. 

 Order 4. Prosobranchiata 



CHAPTER XVII. 

 ii. PTEROPODS 



CHAPTER XVIII. 



