MAMMALIA. 213 



16. Superior laryngeal nerve; it passes through a foramen in the thyroid cartilage 



and receives the preceding branch of the external laryngeal, which has 

 passed through another foramen in the cartilage ; it sends a branch down- 

 wards to join the branch of the recurrent terminating on the lateral crico- 

 arytenoid and the thyro-arytenoid muscles, and is then distributed on the 

 membrane of the glottis, epiglottis, and superior part of the larynx. 



17. Recurrent nerve ; on passing behind the wing of the thyroid cartilage, besides 



the preceding communications with the superior and external laryngeal 

 nerves, it sends the branch to the lateral crico-arytenoid muscle, and the 

 thyro-arytenoid; it gives filaments to the posterior crico-arytenoid muscle, 

 and sends a branch behind this muscle to the transverse and oblique aryte- 

 noid muscles. 



18. Accessory nerve. 



19. Ninth nerve, sending off several descending branches before it passes to the 



muscles of the tongue. 



20. Anterior trunk of the suboccipital nerve ; it supplies the anterior straight and 



lateral muscles of the head, and after receiving a descending branch of the 

 ninth it terminates on the sterno-hyoid and sterno-thyroid muscles. 



21. Superior cervical ganglion of the sympathetic nerve. 



FIG. IV. 



THE SYMPATHETIC NERVE OF THE SHEEP. 



(OVIS ARIES.) 



1. SUPERIOR cervical ganglion of the sympathetic nerve. 2. Vidian nerve. 3. 

 Second trunk of the fifth. 4. Lateral nasal nerve. 5. Palatine nerve. 6. 

 Third trunk of the fifth. 7. Hard portion of the seventh. 8. Glosso- 

 pharyngeal nerve. 9. Par vagum. 10. Ninth nerve. 



