1871.] MYOLOGY OF THE KINKAJOU. 54 ( J 



by means of a thin aponeurotic expansion across the dorsal mesial 

 line, having no spinal attachments. The object of this arrangement 

 is no doubt to facilitate the rapid approximation of the scapulae, e. g. 

 when the animal tears its prey. 



This muscle is inserted into the anterior three-fourths of the sca- 

 pular spine. 



Besides there is an additional portion segmented from the pre- 

 ceding, which arises from the spines of the dorsal vertebras from the 

 second to the tenth inclusive. It crosses the inferior half of the ver- 

 tebral border of the scapula and the adjacent portion of the infra- 

 spinatus, to be inserted into the lower and posterior half of the spine 

 of the scapula. 



The serratus mugnus and levator anguli scapulae constitute one 

 large and continuous muscle. It arises, by fourteen digitations, from 

 the transverse processes of the six lower cervical vertebra?, and from 

 the nine upper ribs. The digitations are arranged in a radiate man- 

 ner, advancing towards the middle line from the first to the sixth 

 ribs, and then recedes to the ninth. Those attached to the six 

 upper ribs extend as far as the anterior extremities of the vertebral 

 ribs, springing from their upper margins ; the three succeeding digi- 

 tations do not advance so far forwards, and fit into corresponding 

 processes from the external oblique muscle of the abdomen. Between 

 the digitations attached to the second and third aud third and 

 fourth ribs pass the two superior muscular slips of insertion of the 

 scalenus posticus. 



The insertion of the serratus magnus does not present that twisted 

 appearance common to the Primates ; but it is simply flattened and 

 extends the whole length of the vertebral border of the scapula. 



In the Paradoxurus there is a similar arrangement, except that 

 the levator anguli scapulae representative is attached to all the cer- 

 vical transverse processes ; the upper and anterior one, no doubt, 

 representing that which I have described in the Kinkajou as the 

 levator scapulse minor. 



The pectoral muscles are three in number, viz. an anterior, a 

 posterior superior, and a posterior inferior. 



The anterior of these three pectoral muscles corresponds to the 

 pectoralis major. It is elongated and irregularly quadrilateral in 

 shape, aud entirely muscular. It is attached proximally to the 

 anterior half of the sternum aud to the sternal extremities of the 

 second to the seventh ribs inclusive. The most anterior fibres over- 

 lap, and are closely associated with the fibres of origin of the sterno- 

 mastoid muscle. It is attached by its distal fibres to the upper half 

 of the anterior border of the shaft of the humerus, extending from 

 the great tuberosity to the distal end of the delto-pectoral ridge. It 

 is partly blended with the fibres of insertion of the levator humeri. 



The posterior superior muscle is situated behind the preceding. 

 It is attached to the second, third, fourth, fifth, sixth, aud seventh 

 ribs close to the sternum, and also to the adjoining margin of the 

 sternum. The muscular fibres converge as they pass outwards, 

 finally terminating in a fascial expansion on the tuberosity of the 



