MAMMALIA. 



227 



22. Accessory nerve ; it communicates with the four superior cervical nerves, 



and gives branches to the sterno-mastoid muscle, and terminates on the 

 trapezius. 



23. Prolongation of the sympathetic nerve. 



24. Right semilunar ganglion. 



25. Ganglion, giving off the inferior mesenteric and hypogastric plexuses. 



G G 2 



