Explains How Shells Are Made; Describes Such Bivalves As Clams, Oysters, And Pectens, And Many Different Univalves; And Gives Suggestions On Building A Shell Collection.
Explains How Shells Are Made; Describes Such Bivalves As Clams, Oysters, And Pectens, And Many Different Univalves; And Gives Suggestions On Building A Shell Collection.