283 



35. M. flexor digitorum brevis {perf or atus), ...... 0-08 oz. 



This muscle is divided into two parts : — 



1 . Flexor indicis perf or atus, having the human origin. 



2. Flexor digitorum, having an origin from the flexor digitorum 



longus tendon, to which it is an accessory muscle. 



36. M. abductor minimi digiti, 0*04 oz. 



37. M. flexor hattucis brevis, 0*07 oz. 



38. M. adductor hattucis, 0'22 oz. 



Muscles of Aem and Hand. 



1. M. trapezius, 1*50 oz. 



2. M.omo-atlanticus(Fig.24,f), 0*31 oz. 



Fig. 24. 



MACACOS NEMESTKINUS. 



a, Trapezius, reflected. 



b, Supraspinatus. 



c, Deltoideus. 



d, Clavicle. 



e, Spine of scapula. 

 /, Omo-atlanticus. 



g, Sternomastoideus. 



h, Massdericus. 



i, Accessory atlantic slip of 



serratus magnus. 

 jj, Accessory occipital slips 

 of rhomboideus. 



Origin ; from the transverse process of the atlas. 



Insertion ; into the anterior third of spine of scapula. 



The insertion of the omo-atlantic muscle in the Macacus neme- 

 strinus forms an exception to its usual insertion in the smaller 

 Macaques, in which it is attached to the third of both the cla- 

 vicle and spine of the scapula nearest the shoulder joint. Its 

 insertion in the M. nemestrinus is like that of the Cercopitheci. 

 In Cynocephalus porcarius and C. maimon it is inserted into the 

 outer third of the spine of the scapula only. This muscle is 

 wanting in the Cebus. 



