250 CIRCULATORY SYSTEM. 



be readily seen by turning up the end of the tongue. It joins 

 the facial near the posterior margin of the mylo-hyoideus mus- 

 cle. ' 



The Submental Vein (Vena Submentalis) arises by ramuscles 

 from the sublingual and the submaxillary gland, and from the 

 contiguous muscles. It joins the facial vein a little below the 

 last: sometimes it runs into the superior thyroidal vein. 



The Inferior Palatine Vein (Vena Palatina Inferior) arises 

 principally from the soft palate and from the tonsil gland, but 

 receives a few twigs from the contiguous parts. It corres- 

 ponds with the inferior palatine artery, a branch of the dorsal 

 lingual, (Dorsalis Linguae;) and descends the pharynx along- 

 side of it, and terminates in the trunk of the facial near the 

 last 



The Lingual Vein (Vena Lingualis) has its origin from a 

 plexus of veins situated on the root of the tongue under its lining 

 membrane, between the epiglottis and the foramen caecum: 

 branches are also sent to it from the muscular structure of the 

 tongue, from the sublingual gland and from the adjacent mus- 

 cles, and it anastomoses with the vena ranina. It goes back- 

 wards between the hyo-glossus and the mylo-hyoideus muscle, 

 along the superior margin of the os hyoides, and then dis- 

 charges into the internal jugular vein near the facial. 



The Pharyngeal Vein (Vena Pharyngea) arises from a plexus 

 of veins belonging to the pharynx, and discharges either into 

 the lingual or into the internal jugular near it. 



The Superior Thyroid Vein ( Vena Thyroidea Superior) cor- 

 responds with the distribution of the superior thyroid artery, 

 in the origin of its primitive roots. Having collected the lat- 

 ter into one or more trunks, it passes upwards and backwards 

 beneath the sterno-hyoid and thyroid muscles, and discharges 

 itself into the upper part of the internal jugular, or into one of 

 the large branches of the external jugular. 



The Occipital Vein (Vena Occipitalis) arises from the 



