MINOR SALIVARY GLANDS. 287 



The parotid gland is supplied with blood by numerous small 

 arteries given off from larger vessels in the immediate neighbour- 

 hood. The nerves come from the carotid plexus, also from the 

 fifth and seventh pairs. 



SUBMAXILLARY GLAND. 



This gland, smaller than the parotid, is long, thin, and cres- 

 centic, with the concavity directed forwards and upwards. It 

 lies in the maxillary space, below and behind the parotid, and 

 on the outer side of the pharynx, extending from the wing of 

 the atlas to the body of the hyoid bone, where it terminates in 

 Whartons duct, which passes between the mylo-hyoid and hyo- 

 glossus brevis, and is continued along the side of the jaw between 

 the hyo-glossus longus and the sublingual gland, opening into 

 the mouth rather in front of the frsenum linguae, where it is pro- 

 tected by a thick papilla on the mucous membrane, commonly 

 called the barb. In structure it is similar to the parotid, but its 

 lobes are larger, its attachments looser, and its duct-coats thinner. 



Like the parotid, this gland receives many small arteries; they 

 come mostly from the external carotid and glosso-facial. The 

 nerves are chiefly from the carotid plexus. 



SUBLINGUAL GLAND. 



This gland is smaller than the last-named, long, flat, and 

 delicate. Situated under the tongue, it is placed longitudinally, 

 with its edges vertical, and included between the mylo-hyoideus, 

 hyo-glossus longus, and genio-hyo-glossus muscles; its superior 

 border reaches the mucous membrane of the floor of the mouth ; 

 anteriorly it extends to the maxillary symphysis, posteriorly to 

 the hyoidean spur process. In the horse it opens by from fifteen 

 to twenty small ducts, the ducts of Rivinus, which are arranged 

 along the floor of the mouth, on what has been termed the sub- 

 lingual crest, each duct being marked at its opening by a papilla. 



Unlike the salivary glands hitherto described, the sublingual 

 gland has a special artery of supply, the sublingual artery ; its 

 nerves come from the gustatory nerve and carotid plexus. 



MINOR SALIVARY GLANDS. 



Other presumably salivary glands are the Molar, the Labial, 

 the Lingual,' and the Staphyline. The Molar glands, so called, 



