156 MAMMALIA. 



then perforates the coraco-brachial muscle ; it then supplies the biceps, and sends a 

 long slender branch downwards to join a branch of the median ; this junction supplies 

 the internal brachial muscle, and sends off the external cutaneous branch, which gives 

 branches to the skin as it passes down the fore-arm and hand, and at the wrist 

 communicates with the radial branch of the spiral. 



In the porpoise there are seven cervical nerves besides the suboccipital ; there are 

 twelve dorsal, eleven compared with the lumbar and sacral, and fourteen caudal. The 

 suboccipital nerve passes out over the atlas and gives branches to cervical muscles, and 

 then joins the first cervical and the large descending branch of the ninth. The first 

 cervical nerve gives filaments to the muscle arising from the transverse process, which 

 is the large scalenus, and then joins the suboccipital and descending branch of the 

 ninth, to terminate on large muscles in the place of the sterno-hyoid ; a branch of the 

 first, joined by one from the second, passes between fibres of the trapezius to the 

 integuments ; another branch has a similar destination. A large branch of the second 

 is given to the large anterior scalenus muscle. The third goes to the phrenic, after it 

 has been joined by a branch from the junction of the fourth and fifth. The fourth and 

 fifth unite and give off the supra-scapular nerve ; this union is then joined to the sixth, 

 and the junction of all these to the seventh and first dorsal for the axillary plexus. 

 The posterior trunks of the cervical nerves give branches to the muscles and skin at 

 the posterior part of the spine. The supra-scapular nerve is sent to terminate on the 

 muscles of the scapula. The axillary plexus gives off numerous branches to the 

 pectoral muscles, the teres, subscapular, and broadest muscle of the back ; from the 

 inferior part of the plexus a small nerve is sent to the great serrated muscle, and a 

 much larger one downwards to the cutaneous muscle at the anterior part of the body. 

 A large nerve similar to the spiral is sent to muscles in the place of the triceps, and to 

 the teres muscle : there is a small median nerve given'to the palm : the division of the 

 ulnar takes place high up, one part goes to the outer edge of the palm, and the other 

 to the back of the hand. There is not a circumflex nerve, neither an internal nor 

 external cutaneous. 



In the fox there are thirteen dorsal nerves, and their principal deviation from 



