Above, an ostrich, a water ouzel and a chordate; below, a sprig abd fruit of a styrax tree, a cape hog and a stalactitic cave. Engraving by Heath.

Licence: Public Domain Mark

Credit: Above, an ostrich, a water ouzel and a chordate; below, a sprig abd fruit of a styrax tree, a cape hog and a stalactitic cave. Engraving by Heath. Wellcome Collection. Source: Wellcome Collection.