Drawing, 'Simia troglodytes' by H [Heinrich] Tiedemann Plate 35, figure 4 showing an anatomical study of the base of the brain of a chimpanzee [Simia troglodytes]. Inscribed with title, publication, and plate details. An ink inscription bottom left reads 'London 1835' and right 'Hunterian Museum'. Signed in ink bottom right 'H Tiedemann delin.' Subject: Eugenics / Anatomy Published in Philosophical Transactions as part of paper titled 'On the brain of the negro [sic], compared with that of the European and the orang-outang' by Friedrich Tiedemann. Received and read to the Royal Society on 9 June 1836. 1835