178 THE INDUSTRIES OF ANIMALS. 



another orifice by which the animal can escape if an 

 enemy should invade the principal entrance. In 

 ordinary times also it serves to ventilate the chamber 

 by setting up a slight current of air. The Squirrel 

 greatly fears storms and rain, and during bad 

 weather hastens to take refuge in his dwelling. If 

 the wind blows in the direction of the openings, 

 the little beast at once closes them with two stoppers 

 of moss, and keeps well shut in as long as the 

 storm rages. 



The great Anthropoid Apes have found nothing 

 better for shelter than the Squirrels' method. It 

 must, however, be taken into account that they have 

 much more difficulty in arranging and maintaining 

 much heavier rooms, and in building up a shelter with 

 larger surface. 



The Orang-outang, which lives in the virgin forests 

 of the Sunda Archipelago, does not feel the need of 

 constructing a roof against the rain. He is content 

 with a floor established in the midst of a tree, and 

 made of broken and interlaced branches. He piles 

 up on this support a considerable mass of leaves and 

 moss ; for the Orang does not sleep seated like the 

 other great apes, but lies down in the manner of Man, 

 as has often been obser\'cd when he is in captivity. 

 When he feels the cold he is ingenious enough to 

 cover himself with the leaves of his couch. 



In Upper and Lower Guinea the Chimpanzee 

 {Troglodytes niger) also establishes his dwelling on 

 trees. He first makes choice of a large horizontal 

 branch, which constitutes a sufficient floor for the 

 agile animal. Above this branch he bends the 

 neighbouring boughs, crosses them, and interlaces 

 them so as to obtain a sort of framework. When 



