62 THE SURGICAL ANATOMY OF THE HORSE 



lingux. The uplifting of the mucous membrane is caused by the 

 underlying gland, and it is called the sublingual ridge. The gland is 

 related outwardly to the mylo-hyoid and inwardly to the stylo-glossus 

 and genio-hyoideus muscles. Its inner face is also crossed by Wharton's 

 Duct and the lingual nerve. The gland is of the compound racemose 

 type. 



The Ducts of Rivinius 



These are the excretory ducts of the sublingual gland. They 

 number from fifteen to twenty for each gland. Their openings into the 

 cavity of the mouth are found on the summits of little tubercles 

 arranged in two rows, which are placed one on each sublingual ridge. 



