Identification
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Caption
Onchidella evelinae. The Soleolifera are shell-less slugs. Of the three families, only one (Onchidiidae) is marine. The other two families are terrestrial, although there is some disagreement among specialists as to whether the land dwellers are members of the Opisthobranchia or the Pulmonata.
Dr. John B. Burch, Ph.D. 
(photographer, copyright holder), Mollusk Division, Museum of Zoology, University of Michigan
