COLOUR PLATES 



I. Abalones of the California Coast 



II. Univalve Shells of Tropical Seas 



III. Univalve Shells of Tropical Seas 



IV. Univalve Shells of Tropical Seas 

 V. Univalve Shells of Tropical Seas 



VI. Tropical Land Shells . 



VII. Marine and Fresh-water Bivalve Shells 



VIII. Bivalve Shells of Tropical Seas 



Frontispiece 



78 

 136 

 178 

 212 

 262 



344 

 422 



