CHAPTER IX.

THE DOG-SHAPED MONKEYS (_concluded_)--THE BABOONS.

The Second Division of the Baboons--THE MANDRILL--Easily distinguished from the rest--Peculiar Appearance and Colour of the Face--The Cheek-ridges--Noticed by the Ancients--Brutality of its Disposition--“Jerry” at the Surrey Gardens--Their Wild State--Anatomical Peculiarities--The Back-bone and Liver--THE DRILL--Distinguished from the Mandrill--Probable Antiquity of these Baboons--Theories of their Relationship to other Animals--THE BLACK BABOON--Its Locality and Description--Probably a Forest Ape--General Summary of the Dog-shaped Quadrumana and Classification of the Group 154