Scan from The Mismeasure of Man, but originally from a mid-19th century work.

"A scientific demonstration from 1868 that the Negro is as distinct from the Caucasian as the Chimpanzee. Josiah Nott was a polygenist who believed that the "races" of man had always been separate.

This was from Josiah Clark Nott and George Robert Gliddon's Indigenous races of the earth (First published 1857).

Source: https://commons.wikimedia.org/wiki/File:Races_and_skulls.png

The common chimpanzee (Pan troglodytes), also known as the robust chimpanzee or simply chimp, is a species of great ape. It is found in in the forests and savannahs of West and Central Africa.