Leucrota
The mouth of this leucrota stretches from ear to ear, but the artist has given it individual teeth instead of the single bone it is said to have instead of teeth.
The image was obtained from the source listed below.
Kongelige Bibliotek Digital Collection
Manuscript
Kongelige Bibliotek, GKS 1633 4° (Bestiary of Ann Walsh), folio 14v
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Possible copyright holder: Kongelige Bibliotek
Medieval Bestiary site copyright information
Kongelige Bibliotek Digital Collection