_c._ =V. jugularis interna= (Fig. 118, 2; Fig. 119, page 284).--The internal jugular vein varies much in size and in the place where it joins the external jugular. The point of junction is usually at about the level of the first rib, but may be much farther craniad. It arises on the ventral side of the basal portion of the occipital by the junction of a number of veins which are described below. The internal jugular passes caudad in the neck region at the side of the trachea, in company with the common carotid artery and the vagus and sympathetic nerves. In this region it receives branches which accompany the branches of the common carotid artery. The veins which by their union form the internal jugular vein are the following: (1) One or two veins from the venous sinuses of the brain, leaving the cranial cavity by the jugular foramen. These are described in the account of the veins of the brain. (2) A large communicating branch from the posterior facial. (3) The =vena occipitalis=, a large branch coming from the vertebral column (which it leaves by the atlantal foramen) and from the back of the head. _d._ =V. facialis anterior= (Fig. 131, _c_).--The anterior facial vein collects the blood from the face, the tongue, and adjacent parts; it joins the =posterior facial= (_b_) caudad of the angle of the jaw to form the external jugular vein. The anterior facial begins over the frontal bone caudad of the orbit, where it is known as the =frontal= vein (_c″_). This runs along the dorsal border of the orbit, into which it dips. It sends a communicating branch into the orbit, and receives small veins (=superior palpebral=) from the upper eyelid. It then turns ventrad, passing along the cranial angle of the eye between the levator labii superioris proprius (5) and the orbicularis oculi (8) muscles, being called in this region the =angular vein= (_c′_). This receives branches (=external nasal veins=, _k_) from the side of the nose. The vein crosses the malar bone obliquely (now receiving the name =anterior facial=, _c_) and follows the cranioventral border of the masseter muscle (9). As it passes the infraorbital foramen it receives through the foramen a small vein from within the orbit. It receives also the =inferior palpebral= (_j_) from the lower eyelid, and the =superior labial= vein (_i_) from the upper lip. Just caudad of the angle of the mouth it receives from beneath the cranioventral margin of the masseter the =V. facialis profunda= (_h_) described below. Still farther caudad it receives the =inferior labial= vein (_g_) from the lower lip, and a small branch from the masseter muscle. Caudad of the middle of the cranioventral border of the masseter it receives from beneath the lymphatic gland of this region the large =submental= vein (_f_). Next the anterior facial vein receives a large communicating branch (=V. transversa=, _d_) which passes transversely across the ventral surface of the throat and connects the two anterior