36 EQUINE ANATOMY. 



thoracic, from the sixtli and seventh cervical pairs, runs 

 across the serratiis niagniisiiniscle aiKJ terminates in it. 



4. ^ERVE OF THE PECTORAL MUSCLES or inferior 

 thoracic: five principal; one to the sterno prescapulafis 

 muscle, another passing between the two pectoral mus- 

 cles and ramifying in the superficial pectoral, the three 

 other branches going to tlie sterno trochineus muscle. 



5. Subcutaneous thoracic neryj: rises in common 

 with the cubital nerve and runs backward on the in- 

 ternal face of the long extensor of the fore arm and 

 of the panniculus carnosus, as far as the flank, where 

 it terminates in the subcutaneous muscle of that 

 region. 



6. ISeRVE of THE LATISSIMUS DORSI fomicd bv tllC 



eighth cervical pair, runs upwaids and backwards to 

 that muscle, where it is distributed. 



7. Axillary or circumflex nerve, from the eight 

 €crvical pair, runs backwards and downwards on the 

 internal face of the subscapularis muscle, passes be- 

 tween it and the teres major, crossing tlie subscapular 

 artery ; behind the scapulo-humeral joint, passes be- 

 tween the short abductor of the arm, the great and 

 middle extensor of tlie fore arm, reaches the long al)- 

 ductor of the arm and terminates in tlie two abductors, 

 the mastoido humeralis and tlie skin. 



8. Nerve of the adductor of the arm, also from 



