52 SURGICAL ANATOMY OF 



nearly opposite the root of the alveolar process of the 

 second molar tooth. Under certain circumstances the 

 carotid artery is in danger of being wounded, such as in 

 excision of the gland or the evacuation of pus, when by 

 its enlargement it is brought still more closely into con- 

 nection with the vessels, but if the precaution be taken 

 of lifting it well from its bed forwards and inwards 

 before the knife is applied for its removal, the risk in 



FIG. 9. 



Relation of the right tonsil viewed laterally, the half of the lower jaw having 

 been removed. 1. Steno's duct crossing the masseter and opening into the buccal 

 cavity. 2. Ascending pharyngeal artery. 3. Stylo-pharyngeus muscle. 4. Pharyn- 

 geal branch of vagus. 5. Glosso-pharyngeal nerve. (Behind which is seen the 

 internal carotid artery.) 6. Tonsil lying between the pillars of the fauces. 7. 

 Stylo-glossus muscle, hooked aside. 8. Wharton's duct. 9. Sublingual gland. 

 10. Superior lobe of submaxillary gland. 11. Stylo-hyoid muscle, hooked aside. 

 12. Gustatory nerve. 13. Submaxillary gland. 14. Spinal accessory nerve. 15. 

 Hypoglossal nerve. 



this instance is avoided ; and in the latter, care must be 

 taken not to push the knife forwards in the line of the 

 angle of the jaw, but backwards into the tumor towards 



