496 



DIGESTIVE SYSTEM OF THE DOG 



Small accessory parotid glands (Glandulse parotidese accessoriae) 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 cm.) long and an inch or more (ca. 3 cm.) 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 linguae. 



The sublingual gland is pink in color and is divided into two parts. The 

 posterior part (Glandula subhngualis grandicanalaris) lies on the occipito-man- 



FiG. 437. — Dissection of Head of Dog, Showing S.\liv.\ry Gi,axds, etc. 

 a, Ocular muscles; 6, pterygoideus medialis (.cut) ; c, stylo-glossus; d, occipito-mandibularis (cut) ; e, genio-glossus; 

 /, genio-hyoideus; g, hyo-glossus; h, thyro-pharyngeus; i, crico-pharyngeus; k, thyro-hyoideus; I, zygomatic process 

 of tem.poral (sawn off); 1, parotid gland; 2, mandibular gland; 3, posterior part of sublifigual gland; 3\ anterior part 

 of same; 4, mandibular duct; .5, ductus sublingualis majo]^; 6, palatine glands; 7, zygomatic gland; S, 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 duct, 

 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 sublinguals 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. 



