72 



U.S. NATIONAL MUSEUM BULLETIN 2 73 



angle of the mandible. I did not notice any particular thickening of 

 the superficial cervical fascia that would merit a separate description. 

 Campbell (1937) studied the shoulder muscles in several platyrrhines, 

 including one Alouatta palliata. The muscle in the Central American 

 species does not offer any difference. It also is inserted superficial to 

 m. trapezius, but is slightly subdivided distally into two bellies. Hill 



Figure 24. — Muscular attachments of the scapula (1, m. trapezius; 2, m. atlantoscapularis 

 anterior; 3, m. deltoideus; 4, m. supraspinatus; 5, m. triceps, caput longa; 6, m. teres 

 minor; 7, m. teres major; 8, m. infraspinatus; 9, m. rhomboideus; 10, m. atlantoscapularis 

 posterior; 11, m. serratus anterior, pars cranialis; 12, m. serratus anterior, pars caudalis; 

 13, m. subscapularis; 14, m. pectoralis major; 15, m. subclavlus; 16, m. biceps brachii, 

 caput breve). 



