Above, an insect, three gastropod molluscs, a guinea hen and a prickly ophidian; below, an ostracean, a tobacco plant, two insects, two orioles, and an ornithoryncus. Engraving by Heath.

Licence: Public Domain Mark

Credit: Above, an insect, three gastropod molluscs, a guinea hen and a prickly ophidian; below, an ostracean, a tobacco plant, two insects, two orioles, and an ornithoryncus. Engraving by Heath. Wellcome Collection. Source: Wellcome Collection.