Black-headed Uakari
John Edward Gray (text)
1849
<i>Proceedings of the Zoological Society of London</i> (<a rel="nofollow" class="external text" href="https://archive.org/details/proceedingsofgen48zool">vol. 1849</a>, <a rel="nofollow" class="external text" href="https://archive.org/stream/proceedingsofgen48zool#page/9/mode/1up">page 9</a>)