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A Tooth of Zeuglodon, One of the 'Yoke Teeth,' from which it derives the name

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A Tooth of Zeuglodon, One of the 'Yoke Teeth,' from which it derives the name.jpg Koch's Hydrarchus. Composed of Portions of the Skeletons of Several ZeuglodonsThumbnailsNature's Four Methods of Making a Wing - Bat, Pteryodactyl, Archæopteryx, and Modern BirdKoch's Hydrarchus. Composed of Portions of the Skeletons of Several ZeuglodonsThumbnailsNature's Four Methods of Making a Wing - Bat, Pteryodactyl, Archæopteryx, and Modern BirdKoch's Hydrarchus. Composed of Portions of the Skeletons of Several ZeuglodonsThumbnailsNature's Four Methods of Making a Wing - Bat, Pteryodactyl, Archæopteryx, and Modern BirdKoch's Hydrarchus. Composed of Portions of the Skeletons of Several ZeuglodonsThumbnailsNature's Four Methods of Making a Wing - Bat, Pteryodactyl, Archæopteryx, and Modern BirdKoch's Hydrarchus. Composed of Portions of the Skeletons of Several ZeuglodonsThumbnailsNature's Four Methods of Making a Wing - Bat, Pteryodactyl, Archæopteryx, and Modern Bird

The best Zeuglodon, the first to show the vestigial hind legs and to make clear other portions of the structure, is in the United States National Museum