248 ALLEN’S NATURALIST’S LIBRARY. 
Andes to Guayaquil. ‘There is a very arid tract on the north- 
east coast of Brazil; but south of Cape San Roque the 
coast forests extend to 30° south latitude, ‘‘ clothing all the 
valleys and hill-sides as far inland as the higher mountain 
ranges, and even penetrating up the great valleys far into the 
interior. ‘To the south-west the forest country reappears in 
Paraguay, and extends in patches and partly wooded country 
till it almost reaches the southern extension of the Amazonian 
forests. ‘lhe interior of Brazil is thus in the position of a great 
island plateau, rising out of, and surrounded by, a lowland 
region of ever-verdant forests.” Of its Anthropoid life the 
Woolly Monkeys (Zagothrix), the Sakis (Pithecta), and the 
Uakaris (Brachyurus) are confined to its Amazonian forests. 
The Woolly Spider-Monkeys (Brachyteles) keep to the wooded 
coast-regions of South-east Brazil, while the Titis (Cad/‘hrix) 
do not range out of the tropics of South America. The 
Howlers ( A/owatta), the Spider-Monkeys (4 #e/es), and the Capu- 
chins (Cebus) roam nearly over the whole region—the first 
and last ranging from Costa Rica to Paraguay as well. The 
Spider-Monkeys indeed extend over to the west side of the 
Equatorial Andes, and in Guatemala across to the Pacific 
coast. No species of Monkey, however, is known to inhabit 
the western side of the Andes, to the south of the Gulf of 
Guayaquil. . 
THE BABOONS, GUEREZAS AND LANGURS. 
FAMILY CERCOPITHECIDA:. 
With the following account of the numerous species of the 
genera of this family, we come to consider the first section of 
the Old World, or Catarrhine* Monkeys. These are distin- 
* kata, down ; pus, pivos, nose or nostril. 
