496 DIGESTIVE SYSTEM OF THE DOG 
Small accessory parotid glands (Glandule parotide® accessorize) are sometimes 
found along the course of the duct. 
The mandibular gland is usually larger than the parotid. In large dogs it 
is about two inches (ca. 5 em.) long and an inch or more (ca. 3 em.) wide. It is 
rounded in outline, pale yellow in color, and is enclosed in a fibrous capsule. Its 
upper part is covered by the parotid, but it is otherwise superficial, and is palpable 
in the angle of junction of the jugular and external maxillary veins. The 
mandibular duct leaves the deep face of the gland, passes along the surface of 
the occipito-mandibularis and stylo-glossus, and opens into the mouth on a very 
indistinct papilla near the frenum lingue. 
The sublingual gland is pink in color and is divided into two parts. The 
posterior part (Glandula sublingualis grandicanalaris) lies on the occipito-man- 
Fie, 437.—DrssectTion or Heap or Doc, SHOWING SALIVARY GLANDS, ETC, 
a, Ocular muscles; 6, pterygoideus medialis (cut); c, stylo-glossus; d, oceipito-mandibularis (cut); e, genio-glossus; 
f, genio-hyoideus; g, hyo-glossus; 4, thyro-pharyngeus; 7, crico-pharyngeus; /, thyro-hyoideus; 1, zygomatic process 
of temporal (sawn off); 7, parotid gland; 2, mandibular gland; 3, posterior part of sublingual gland; 3’, anterior part 
of same; 4, mandibular duct; 5, ductus sublingualis major; 6, palatine glands; 7, zygomatic gland; 8, ducts of 7; 9, 
lacrimal gland. (Ducts colored red.) (After Ellenberger, in Leisering's Atlas.) 
dibularis muscle in intimate relation with the mandibular gland, but is clearly separ- 
able from it after removal of the common fibrous capsule. It has a pointed anterior 
process. Its duct (Ductus sublingualis major) accompanies the mandibular duet, 
and either opens beside it or joins it. The anterior part (Glandula sublingualis 
parvicanalaris) is long and narrow; it lies between the mucous membrane of the 
mouth and the mylo-hyoideus, dorsal to the stylo-glossus muscle. It has a number 
(8 to 12) of small ducts (Ductus sublinguales minores), some of which open directly 
into the mouth, while others join the large duct. 
The zygomatic gland (Glandula zygomatica)! (Fig. 437) is situated in the 
anterior part of the pterygo-palatine fossa. It is related superficially to the zygo- 
matic arch and the masseter and temporal muscles. Its deep face is in contact 
with the periorbita, the pterygoid muscle, the internal maxillary artery, and the 
1 Also known as the orbital gland. 
