LYMPHATIC SYSTEM OF THE OX AND SHEEP 



723 



long arid an inch (ca. 2-3 cm.) wide. In some cases a second, smaller gland is 

 present. Its position is variable; it may be behind or dorsal-medial to the large 

 gland, or may be on the deep face of the ventral end of the mandibular salivary 

 gland. Hsemolymph often occur in this vicinity. The efferent vessels come from 

 the muzzle, lips, cheeks, hard palate, the anterior part of the turbinates and septum 

 nasi, the gums (in part) ; the sublingual and parotid glands; the tip of the tongue, 

 the muscles of the head, except those of the eye, ear, tongue, and hyoid bone; the 

 mandible, premaxilla, and nasal bone; the skin of the face in part. It also receives 

 the efferent vessels of the pterygoid lymph gland when present. The efferent 

 vessels, two to four in number, go to the atlantal gland. 



The parotid lymph gland (Lg. parotidea) lies on the posterior part of the mas- 

 seter muscle and is partly covered by the dorsal end of the parotid salivary gland. 

 It is related deeply to the internal maxillary and superficial temporal vessels and 

 the superficial temporal nerve. It is about three inches (ca. 6-8 cm.) long and about 

 an inch (ca. 2-3 cm.) wide. In some cases there are instead two smaller glands. 



Fig. 603. — Superficial Lymph Glands of Cow Pbojected on Suhface of Body. 



1, Mandibular; 2, parotid; S, atlantal; A, parapharj'ngeal ; 5, anterior cervical: 6, middle cervical; 7. prescapular; 



8, prefemoral. (With use of fig. in Ellenberger-Baum, Anat. f. Kiinstler.) 



The afferent vessels come from the muzzle, lips, the gums (in part), the anterior 

 part of the turbinates and septum nasi; the parotid salivary gland; most of the 

 muscles of the head, including those of the eye and ear; the eyelids, lacrimal gland 

 and external ear; the frontal, malar, nasal and premaxillary bones and the mandible; 

 the skin of the head in great part. The efferent vessels, eight to twelve in number, 

 go to the atlantal gland. . 



The suprapharyngeal lymph glands (Lgg. suprapharyngea3)i ^re usually two 

 in number, right and left. They are situated about an inch apart, medial to the 

 great cornu of the hyoid bone, and between the pharynx and the ventral straight 

 muscles of the head (Fig. 386). They average about three inches (ca. 6-8 cm.) 

 in length. In some cases an additional gland is present. The afferent vessels come 

 from the tongue, the floor of the mouth, the hard palate, the soft palate, the gums 

 (in part), the pharynx, the sublingual and mandibular salivary glands; the posterior 

 ' Also commonly termed the retropharyngeal glands. 



