66 EXPRESSION. 
pitalis and attrahens auriculam are brought into 
action. 
The raising of the inner ends of the eyebrows, 
while they are depressed in the rest of their extent, 
is not a downright and intense expression of one 
mastering emotion, but comes from a struggle of 
conflicting feelings. It is a combination similar 
to the raising of the upper lip while the angles of 
the mouth are drawn down; and it often accom- 
panies that action in expressing the acuteness of 
the petty vexation which is akin to disgust and 
sometimes so named. Then the expression travels 
up from the mouth to the forehead. 
This brings to our notice that some expressions 
are more liable to be shown by the mouth, others 
by the eye and forehead, and only when they be- 
come intense do they invade the whole face. I 
believe that I shall be correct in saying that ex- 
pression for the information of others is most 
iiable to be made with the mouth, the organ of 
communication with the world ; while expressions 
that betray thoughts unintentionally with the outer 
world are most liable to begin in the eye and fore- 
head. 
I take it that the transverse wrinkling of the 
brow is simply the expression of mental irritation by 
muscular contraction, such as occurs in the rest of 
