MAMMALS, 



607 



beard, but it disappears in some of the domestic breeds of 

 the common goat; and neither sex of the Hemitragus has 

 a beard. In the ibex the beard is not developed during the 

 summer, and it is so small at other times that it may be 

 called rudimentary.* With some monkeys the beard is 

 confined to the male, as in the orang; or is much larger in 



i?o 





Ilg, 68. Pithecia satanas, male (from Brehm). 



the male than in the female, as in the Mycetes caraya and 

 Pithecia sanatas (fig. 68). So it is with the whiskers of 

 some species of Macaous,t and, as we have seen, with the 

 manes of some species of baboons. But with most kinds 

 of monkeys the various tufts of hair about the face and 

 head are alike in both sexes. 



*See Dr. Gray's "Cat. of Mammalia in British Museum," part iii, 

 1852, p. 144. 



fRengger, "Saugethiere," etc., s. 14; Desmarest, "Mammal- 

 ogie," p. 86. 



