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Caption
Dreissena polymorpha on the snail Elimia livescens, Lake St. Clair, Michigan. Four Elimia specimens are shown here, two in dorsal view and two in ventral view. Such snails will not live long with such loads on their backs.
Dr. John B. Burch, Ph.D.
(photographer, copyright holder), Mollusk Division, Museum of Zoology, University of Michigan

