Mackintosh — Notes on the Myology of the Coati-Mondi,^-c. 51 



the humerus as usual. In N.fusca it consists of three parts — one extend- 

 ing from the entire sternum to the pectoralridge of the humerus, a second 

 going from the six anterior mesosternal sternebrse to the greater 

 tuberositj^ of the humerus and tendon of supraspinatus, and the third 

 arising from the abdominal parietes, inserted below the last, and united 

 with pectoral quartus. Pectoralis quartus ("14) arises fi-om the caiti- 

 lagesof the lower ribs and from the fascia over them, and is inserted in 

 the axilla in close contiguity with latissimus dorsi (and pectoralis major 

 in Martes). 



Subclavius was absent in all, unless represented by the prester- 

 nohumeral slip of pectoralis major, which is very constant in carni- 

 vora. Coracobrachialis was very small, and represented only by the short 

 variety in the coatis ; but in the martins both longus and brevis existed, 

 arising by a common tendon from the coracoid process ; the former was 

 inserted bj' a tendinous sling extending from the latissimus dorsi tendon 

 to the lower third of the humerus, and the latter into the same bone, 

 above latissimus and separate from it. 



Deltoid consists of three parts, clavicular ('07), scapular ('04), and 

 acromial ('03), as usual. The first of these is only remarkable for its 

 very low humeral insertion in N. narica ; the second arises in N. fusca 

 from the fascia along the inferior border of the infraspinous fossa, and 

 in Martes from the outer half of the scapular spine ; the third has some 

 of its fibres continuous with those of brachialis anticus, and shows a 

 distinct inscription at the point of junction of the two, in N. narica. 

 Supraspinatus ('10) and infraspinatus ("9) anj normal in all, the former 

 being the larger. Subscapularis is also normal, and has respectively 

 three, four, and five tendinous planes iniV. narica, Martes, and N.fusca. 

 There was no separate pre-scapular slip in the first two, but in N.fusca 

 it was quite distinct, passing down over the tendon of the rest of 

 the muscle. 



Serratus magnus ("16) arises from eight ribs and six cervical trans- 

 verse processes in N. narica, from nine ribs in N. fusca, and from seven 

 ribs and five cervical transverse pi^ocesses in Martes, and is inserted as 

 usual. The cervical origin was not recorded in N. fusca. Serratus 

 posticus superior arises from the fascia of the hack, and is inserted into 

 the third, fourth, fifth, sixth, seventh, eighth, and ninth ribs in N. 

 narica, and into the fifth to the fifteenth in N. fusca. Serratus posticus 

 inferior is inserted into the three lower ribs in N. narica. 



Biceps ("06) is glenoradial in its attachments as usual. Brachialis 

 anticus ('06) arises from the whole of the external aspect of the hu- 

 merus, and is inserted into the ulna. Triceps longus ("lO) not very 

 separate from externus in the coatis, though perfectly so in Martes, has 

 two heads in N. narica — one from the edge of the glenoid cavity, and the 

 other from the axillary border of the scapula ; the insertion is ole- 

 cranal as usual ; it is fused with triceps externus in the N.fusca. Triceps 

 internus and externus ("10) are fused in N. narica, but moderately 

 separate from one another in the other animals ; externus is the larger 

 ot the two in Martes. Darsi-epitrochlearis ('05) arises in N. narica fvoux 



