MAMMALIA, 361 



spaces of forty or fifty feet, and, according to Darwin, they 

 are the most musical mammals ne.xt to man, " singing a 

 complete and correct octave of musical notes." The orang- 

 outang (Simla) (Fig. 379) is found in the islands of Bor- 

 neo and Sumatra. They attain a length of a little over 

 four feet, and a weight of one hundred and fifty pounds. 

 The number of ribs is the same as in man, and there is 

 some resemblance in the form of the brain, yet the capacity 

 of the brain of the orang is only twenty-five cubic inches, 

 while in man it is from seventy-five to ninety-two cubic 

 inches. The arms are extremely long, the knuckles 

 touching the ground in walking. The face is bare, the 

 skin shiny black, and under the throat hangs in loose, 

 flabby folds. The body is covered with reddish hair, 

 twelve or fourteen inches long. In the male Simia Wurmbii 

 the face is widened to an extraordinary extent by a hard, 

 gristly expansion of the cheeks, measuring across the face 

 thirteen inches. The female is smaller, the hair a lighter 

 brown. They are entirely arboreal, living always in the 

 tree-tops, never jumping, but swinging their heavy bodies 

 five or six feet at a time by collecting the branches. When 

 at rest or wounded, they break off branches and twigs and 

 form platforms or nests in the tree-tops. Their favorite 

 food is the fruit of the durian-tree. The voice is loud 

 and resonant, and can be heard for a long distance. 



The chimpanzee (Mimetes) (Fig. 379) is found upon 

 the west coast of Africa, from the Gambia to the Benguela, 

 and inland to 28 east longitude. They attain a height 

 of nearly five feet, can stand or walk erect, but prefer to 

 bend forward upon the knuckles (Fig. 380). The face is 

 black and exceedingly human in its outline ; they approach 

 man, however, most closely in the character of the skuil, 

 their dentition, and the proportionate size of the arms; the 

 brain capacity, however, is only twenty-six cubic inches. 

 The canine teeth are powerful, though their food is en- 

 tirely vegetable. They are arboreal s living in the trees, 



