Skeletons of a dugong (halicore), a sheep, a pig, a mole, a three-toed sloth, a black rat and an anteater. Line engraving, 1830/1870?.

Licence: Public Domain Mark

Credit: Skeletons of a dugong (halicore), a sheep, a pig, a mole, a three-toed sloth, a black rat and an anteater. Line engraving, 1830/1870?. Wellcome Collection. Source: Wellcome Collection.