EXTERNAL ANATOMY OF THE HORSE'S HEAD 173 



q. The maxillary gland, or gland of the lower jaw, with its 

 duct. 



r. At this situation the submaxillary artery, a branch of the 

 jugular artery and the parotid duct pass under and 

 within the angle of the lower jaw, and reappear again at 

 // and, ascending the cheek, are distributed in a branch- 

 ing manner over it. 



s. The subscapula hyoideus, emanating from under the 

 shoulder-blade to the body of the os hyoides, to draw 

 back that bone. 



w. The sternQ-maxillaris, or muscle belonging to the breast- 

 bone and upper jaw, from the cartilage in front of the 

 chest to the angle of the lower jaw, for the purpose 

 of bending the head ; or, if one only act, to bend it on 

 one side. 



//. The levator humeri, or elevator of the shoulder, arising 

 from the tubercle of the occiput, the mastoid, or nipple- 

 shaped process of the temporal bone ; and the trans- 

 verse processes of the four first bones of the neck and 

 the ligament of the neck, and proceeding to the muscles 

 of the shoulders and the upper bone of the arm, for the 

 purpose of drawing forward the shoulder and arm, or to 

 turn the head and neck ; and, when the two levators 

 act, to depress the head. 



v. The jugular, or neck-vein. It is from this vein that blood 

 is taken for all diseases in the head, neck, and contiguous 

 parts. 



x. The tendon common to the complexo major, or larger 

 complicated tendon ; and the spleiiius, or splint-like 

 tendon, and the mastoid process of the temporal, to 

 hold up the head, or, the muscles on one side alone 

 acting, to turn it. 



y. The superior portion of the ligament of the neck. 



z. The superior portion of the parotid gland, or gland situate 

 near the ear, reversed to exhibit the blood-vessels and 

 nerves beneath it. 



