VENTRAL MUSCLES OF NECK 



225 



ft passes forward, outward, and upward, crossing over the sterno-ccphalicus and 

 jugular furrow obliquely. On reaching the surface of the mastoido-humeralis 

 it adheres closely to this muscle, and soon thins out, to be continued over the 

 splenius and trapezius by an aponeurosis which is difficult to remove from the latter 

 muscle. Scattered bundles may be traced on the ventral surface of the neck to 



Fig. 177. — Antero-laterai. Vikw of Musci.ks and Skeleton of Horse. 

 a. Trapezius; c, mastoido-humeralis; d, .sterno-cephalicus; /, long head of triceps; /', external hea<l of 

 ■triceps; </, anterior superficial pectoral muscle; g' , posterior superficial pectoral; h' , anterior deep pectoral; r, 

 cervical panniculus; z, supraspinatus; 29, omo-hyoideus; SO, sterno-thyro-hyoideus; 31, jugular vein; 32, 

 cephalic vein; 1, scapula; 1' , cartilage of scapula; 2, spine of scapula; 4, shaft of humerus; 4', external epi- 

 condyle; 5, external tuberosity of humerus; ff, deltoid tuberosity; /4, ventral border ("keel") of sternum; 14', 

 cariniform cartilage; I.R., first rib. (After Ellenberger-Baum, Anat. fiir Kimstler.) 



the facial jiortion. The right and left muscles meet at a ventral median raphe in 

 pennate fashion. 



2. Mastoido-humeralis. — This is described on p. 252. 



3. Sterno-cephalicus (Sterno-maxillaris s.-mandibularis)/ — This is a long, nar- 



^ This muscle is probably the homologue of the sternal portion of the sterno-cleido-mastoid 

 ■of man. On account of the differences in its insertion in the various animals, it seems desirable 

 ■to adopt the name sterno-cephalicus. 

 15 



