Description Mandrillus leucophaeus syn. Simia sylvicola
Musei Leveriani explicatio, anglica et latina / opera et studio Georgii Shaw ... ; adduntur figuræ, eleganter sculptæ et coloratæ.
Date 1792
Source http://www.biodiversitylibrary.org/pageimage/29568637
Author Sydenham Edwards; Philip Reinagle; Charles Reuben Ryley; George Shaw; William Skelton; Sarah Stone
Source: https://commons.wikimedia.org/wiki/File:Musei_Leveriani_explicatio,_anglica_et_latina_BHL29568637.jpg

The drill (Mandrillus leucophaeus) is a primate of the family Cercopithecidae (Old World monkeys), related to baboons and even more closely to mandrills. Drills are found only in Cross River State in Nigeria, southwestern Cameroon (south to the Sanaga River), and on Bioko Island, part of Equatorial Guinea, in rainforest habitats.