20 TYPES OF ANIMAL LIFE 



moustache monkeys have a hardly less conspicuous stripe 

 where the moustache should be. Other monkeys of western 

 Africa are singularly distinguished by having the eyelids 

 white, though the rest of the face is dark, and they are 

 named accordingly " white-eyelid monkeys." The com- 

 monest of the whole group is the green monkey, which 

 naturally inhabits the Cape Verd Islands, but which 

 has been introduced and has run wild in one of the 

 Antilles. 



All these African monkeys have long tails and ischiatic 

 callosities. They also have better developed thumbs than 

 the Asiatic ones of the group containing the entellus, and 

 they introduce us to a new character. If a visitor to a 

 menagerie presents one of these small African monkeys 

 with first one and then another nut, the nuts will not 

 at once be cracked and eaten, but will be put successively 

 inside the cheeks, which will be observed to protrude 

 in a remarkable manner. These dilatable face pockets 

 are called cheek-pouches. Nothing of the kind is pos. 

 sessed by any of the higher Old World apes, though their 

 possession is a constant character not only of the group we 

 are now considering, but also of all the Old World monkeys 

 which yet remain for us to notice, and which may be taken 

 to constitute two more groups. The first of them is entirely 

 confined to the continent of Asia, with the one exception 

 of the Barbary ape, which also lives on the rock of 

 Gibraltar. The existing specimens there abiding are, 

 however, either individuals which have been of late re- 

 introduced from Africa, or they are the ofispring of such. 

 The Barbary ape, or "magot," has a special interest, 

 from the fact that a time when prejudice did not allow 

 the human body to be used for medical study and dis- 

 section, the body of that ape was employed as a substitute, 

 as very old anatomical works conclusively prove. The 



