Illustration from the book given under "Source"
as per caption
published 1894
<p><a rel="nofollow" class="external text" href="https://archive.org/details/handbooktoprimat01forbe"><i>A Hand-book to the Primates</i> vol. 1</a>  (1894)
</p>
by Forbes, Henry Ogg; Sharpe, Richard Bowdler (ed.)