Illustrations 



Cylinder Shells, Pcnd Snails, Midas's Ear and Tooth Shells 



Wood-boring Bivalves . 



Piddocks. Rock-borers 



Parts of a Hard-shell Clam 



Razor Clams and Other Clams 



The Old Clam Digger 



Rock-borers and Hard-shell Clams 



Soft-shell and Other Clams 



Clams Useful and Beautiful 



Clams and Cockles 



Wedge Shells and Tellens 



Giant Clams and Sunset Shells 



Cockles .... 



Rock Oysters and a Sea Clam 



One Valve of the Giant Clam of Australia, and Bear's Paw 

 Clam ......... 



Chestnut Crassatells, Tiger Lucina, Grooved Lunica, North- 

 ern Cardita, Waved Astarte, Broad-ribbed Cardita 



Fresh-v^ater Mussels 



Fresh-water Mussels 



Making Pearl Buttons at Muscatine, Iowa 



Ark Shells and Others . 



Mussels ..... 



Acres of Edible Mussels . 



Wing Shells, Rock-dwellers and a Mussel 



Oysters of Tropical Seas . 



Pen Shells 



Thorny Oysters and Others 



Marine Bivalve Shells 



Scallops and a File Shell 



Scallop Shells .... 



Oysters and Jingle Shells 



The Oyster and Oystering on Great South Bay, Long Island 



Masses of Coon Oysters . 



Egg Cradle of the Paper Nautilus 



Chambered Nautilus 



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