186 MAMMALIA. 



PLATE XXVI. 



FIG. I. 



THE SYMPATHETIC NEEVE IN THE EIGHT SIDE 



OF THE CALF. 



(BOS TAURUS.) 



IN this figure the heart is placed for shewing the right coronary artery. 



1. Prolongation of the sympathetic; near the bottom of the neck it separates 



from the trunk of the par vagum, and sends off a branch to the recurrent 

 nerve ; it passes behind the subclavian artery and one sending off the 

 superior intercostal, to the first thoracic ganglion, having previously sent a 

 smaller branch to this ganglion. . 



2. First thoracic ganglion of the sympathetic nerve. 



3. A large branch from the first thoracic ganglion of the sympathetic nerve 



passing up with the vertebral artery, and communicating with the cervical 

 nerves, and following the artery into the spinal canal. 



4. A large branch from the first thoracic ganglion passing behind the innominata, 



to which it gives filaments, and then behind the ascending aorta and the 

 pulmonary artery, and emerging from beneath this vessel to follow the left 

 coronary artery to the left ventricle of the heart. This termination is seen 

 in Fig. 2. 



