THE MOUTH
1 hat part of the jaws in which the teeth are set is cylindrical in shape and
controls the shape of the mouth. If the cylinder is flat in front, the lips will
be thin and the mouth a slit. The greater the curve of this cylinder, the fuller
and more bow-shaped will be the mouth and lips.
From the base of the nose to the upper red lip, this curtainous portion of
the mouth has a central vertical groove and pillars on either side which blend
into broad, drooping wings, ending at the corners of the mouth in fleshy
eminences called the pillars of the mouth.
The upper red lip has a central wedge-shaped body, indented at the top
by the wedge of the groove above, and two long, slender wings disappearing
under the pillars of the mouth. The lower red lip has a central groove with
a lateral lobe on either side. It has three surfaces: the largest depressed in