Identification
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Caption
Radix sp. In this dorsal view, the kidney (the light tan band showing through the shell) is readily evident. Also noticeable is the large air bubble in the lung. Although an aquatic snail, Radix species are mainly air breathers.
Dr. John B. Burch, Ph.D.
(photographer, copyright holder), Mollusk Division, Museum of Zoology, University of Michigan

