Betty Cavanna - Bivalves - 1955 - 38 pages
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.
R. Tucker Abbott - Nature - 2014 - 280 pages
This eBook is best viewed on a color device. Scoop up plentiful Cockles on Eastern beaches. Spy a fabulous Emperor Helmet in Southern Florida. Find a Red Chiton on the Pacific ...