The =rima oris= is extensive, the angles of the mouth being situated far
back. The =upper lip= is thick and short, and is blended with the snout;
the =lower lip= is small and pointed. The labial glands are few and
small.
The mucous membrane of the =cheeks= is smooth. The =buccal glands= are
compactly arranged in two rows opposite the cheek teeth. The =parotid
duct= opens opposite the fourth or fifth cheek tooth.
The =hard palate= is long and narrow; it is marked by a median furrow,
on each side of which are twenty or more ridges. On its anterior part
there is a triangular incisive papilla, at which the naso-palatine ducts
open.
The =soft palate= is very thick. Its direction almost continues that of
the hard palate, _i. e._, it is nearly horizontal. It extends to the
middle of the oral surface of the epiglottis.[110] It has a median
prolongation termed the =uvula=. The oral surface presents a median
furrow, on either side of which is an oval raised area, marked by
numerous crypts; these elevations are the =tonsils=. Tonsillar tissue
also occurs in the lateral walls of the fauces.
[Illustration: