Clam Dissection- University of Minnesota. Nice photograph of internal anatomy, but not labeled.
Clam Dissection Guide- A guide only, no photographs or diagrams, yet there is much material on taxonomy, and description of structure and function.
Class Bivalvia- The clams, mussels, oysters, and their relatives.
Zebra Mussel Research Program- Zebra mussels, an introduced mollusc, are now found in a great number of eastern waterways in the U. S. This site has an enormous amount of information, as well as photos.