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 



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