Footnote 42:

See for example the rhapsodic passage on the human thumb in De usu partium 3.79.16: “Tell me, O noble sophists, and clever accusers of Nature, have you ever seen in the ape this finger that is commonly called the antihand and that Hippocrates calls the great finger, etc.” tr. May 1968 p. 107, and 3.263.17 ( May 1968 p. 202) on the inability of apes to extend their leg fully. Galenic anatomy, often inaccurate in the comparison of humans and apes, concentrates mainly on what a poor imitation of man the ape is: “the ape’s whole body is a caricature of the human body.” (3.80.15, May p. 108). In his 1555 revision, Vesalius qualifies his claim of Galen’s neglect of other differences: “he noticed almost none except in the fingers and the flexion of the knee.”