THE MOUTH 445 
large pointed conical papilla (Papille conice), which are directed toward the 
isthmus faucium and are covered with a horny epithelium. The largest of these 
have a length of about half an inch (ca. 1 to 1.5 cm.) and are situated around 
the angle of the mouth and parallel with the cheek teeth. The orifice of the parotid 
duct is opposite the fifth upper cheek tooth. The buccal glands (Fig. 385) are very 
well developed, and are arranged 
in three parts. The dorsal part 
extends from the angle of the 
mouth to the maxillary tuberos- 
ity; its lobules are of a light yel- 
low color. The ventral part con- 
sists of a compact brownish mass 
which reaches from the angle 
of the mouth a short distance 
under the masseter muscle. The 
middle part consists of loosely 
arranged yellow lobules. The 
small ducts of these glands open 
between the papille of the cheek. 
A linear series of large pa- 
pille exists on the floor of the 
mouth on each side of the frenum 
lmgue. Near these are found 
the openings of the small ducts 
of the sublingual gland. The 
earuncula sublingualis, the pa- 
pilla on which the sub-maxil- 
lary duct opens, is wide, hard, 
and has a serrated edge (Fig. 
383). 
The hard palate is wide, and 
is usually more or less pigmented. 
The body of the premanilla is 
covered with a thick layer of 
dense connective tissue, which 
has a thick, horny epithelial cov- 
ering—forming the so-called den- 
tal plate or pad. The palatine 
Tidges extend from this back- - 
ward about two-thirds of the RS: enka ce Ce we eee 
Bet dine hard palate; they ,;_,1jvrailmedos Pate: 2 Plast on pita inva with ne 
number iHieto £9: They are 5, smooth part of palate showing orifices of palatine glands; 6, 
nearly straight, and, with the Upper lip; 7, conical papillz of cheek. 
exception of a few at the poste- 
rior end of the series, are serrated on the free edge. A median raphé extends 
between the ridges. The posterior third of the palate is smooth. Between 
the dental plate and the first ridge is the triangular papilla incisiva; on either 
side of this is a deep furrow, in which is the oral opening of the ductus incisivus.' 
|The duct is two inches or more (ca. 5 to 6 cm.) in length and opens on the floor 
f the nasal cavity; it also communicates by a slit-like opening with the vomero- 
asal organ. 
1 This is also known as the naso-palatine canal. 
