680 



MESSRS. B. C. A, WINDLE AND F. O. PARSONS ON [DeC. 17, 



into the spine from that which ends in the root of the spine. 

 When a separation is either natui'ally or artificially made, it is 

 found that the secoud part (counting the cephalo-humeral as the 

 first) rises from the posterior half or t\\o-thirds of the ligamentum 

 iiuchae and from two or three anterior thoracic spines, while the 



Text-fig. 90. 



Shoulder-muscles of the Hyrax. (Dorsal view.) 



1. Trapezius. 



2. Supraspiuatus. 

 '3. Omo-trachelian. 

 4. Infraspinatus. 



Ti & f>. Deltoid. 



7. Teres minor. 



8. Dorso-epitrochlearis. 



9. Latissimus dorsi. 

 10. Teres major. 



11 & 12. Triceps. 



third or posterior part conies from a very variable number of 

 thoracic spines behind the third, usually reachiug for about the 

 anterior two-thirds of the thoracic region of the vertebral column. 



