Finally, as regards the brain and nervous system. In the man-shaped Apes the brain is smaller as compared with the nerves which proceed from it than in man; and the brain proper is smaller relatively to the cerebellum than in man. The convolutions, the fissures, and eminences of the brain are generally less complex, and those of the two sides or hemispheres of the brain are more symmetrical than in man. The sides of the brain or the hemispheres are rounder and deeper in man, and the proportions of their lobes to one another are different. Some convolutions and fissures present in man are less perfectly formed, but still exist in the Apes, and the cerebellum is not covered entirely in the Hylobates, but it is in the other Anthropomorpha. CHAPTER V. THE DOG-SHAPED MONKEYS[25]--1. SEMNOPITHECUS--2. COLOBUS. General Characteristics of the Monkeys of the Old World--Distinguished from the Apes by Length of the Hinder Limbs and presence of Tails--Divided into those with and those without Cheek-pouches--Use of the Cheek-pouches--The two Genera of Pouchless Monkeys--THE SACRED MONKEYS, or Semnopitheci--Derivation of the Name--First Discovery--Ape Worship in India--General Description--Limited to Asia--THE SIMPAI--Its Locality and Appearance--THE BUDENG--Hunted for their Fur--Its Colour and Appearance--THE LONG-NOSED MONKEY--Reason of the Name--Quaint Appearance of the Young--Anatomical Peculiarities--Their First Appearance in Europe--Description of the Nose--Peculiar Formation of the Stomach--Bezoars--THE HOONUMAN MONKEY--The Sacred Monkey of the Hindoos--Legends about it--THE DOUC MONKEY--Its Appearance and Habitat--THE BLACK-LEGGED DOUC--Anatomical Peculiarities--THE CROWNED MONKEY--THE RED MONKEY--THE SUMATRA MONKEY--THE WHITE-BEARDED MONKEY--Found in Ceylon--Its Intelligence--THE GREAT WANDEROO--Other Ceylonese Monkeys--THE GENUS COLOBUS, or Thumbless Monkeys--Description of the Hand and Wrist--Different Varieties--COLOBUS VERUS--COLOBUS GUEREZA--Their Habitat and Peculiarities--Fossil Semnopitheci.