202 THE DESCENT OF MAN 



tematie works, and as, when numerous, they clearly reveal 

 our relationship, I will specify a few such points. The rela- 

 tive position of our features is manifestly the same ; and the 

 various emotions are displayed by nearly similar movements 

 of the muscles and skin, chiefly above the eyebrows and 

 round the mouth. Some few expressions are, indeed, al- 

 most the same, as in the weeping of certain kinds of mon- 

 keys and in the laughing noise made by others, during 

 which the corners of the mouth are drawn backward, and 

 the lower eyelids wrinkled. The external ears are curiously 

 alike. In man the nose is much more prominent than ia 

 most monkeys; but we may trace the commencement of aa 

 aquiline curvature in the nose of the Hoolock Gibbon; and 

 this in the Semnopiihecus nasica is carried to a ridiculous 

 extreme. 



The faces of many monkeys are ornamented with beards, 

 whiskers, or mustaches. The hair on the head grows to a 

 great length in some species of Semnopithecus ;° and in the 

 Bonnet monkey {Macacus radiatus) it radiates from a point 

 on the crown, with a parting down the middle. It is com- 

 monly said that the forehead gives to man his noble and 

 intellectual appearance; but the thick bair on the head of 

 the Bonnet monkey terminates downward abruptly, and ia 

 succeeded by hair so short and fine that at a little distance 

 the forehead, with the exception of the eyebrows, appears 

 quite naked. It has been erroneously asserted that eye- 

 brows are not present in any monkey. In the species just 

 named the degree of nakedness of the forehead differs in 

 different individuals; and Bschricht states' that in our 

 children the limit between the hairy scalp and the naked 

 forehead is sometimes not well defined; so that here we 

 seem to have a trifling case of reversion to a progenitor 

 in whom the forehead had not as yet become quite naked. 



It is well known that the hair on our arms tends to con- 



« Isid. GeofEroy, "Hial. STat. 66n.," torn, ii., 1859, p. 217. 

 ' "Ueber die Richlung der Haare," etc. Miiller's "Archiv fur Anat. und 

 Phys.," 1837, s. 51. 



