MYOLOGY OF ANOMALURUS. 



J21 



the neck of the humerus. (I) The deep portion, or Pectoralis 

 minor, rises from the 3rd, 4th, and 5th costal cartilages at their 

 junction with the sternum, and is inserted into the head o£ the 

 humerus and capsule of the shoulder. 



Suhclavius. — This muscle is well developed, and is inserted into 

 the posterior border of the outer third of the clavicle. This is the 

 arrangement which is always present in sciuromorphiue rodents. 

 In the Hystricomorpha the subclavius is continued on to the 

 spine of the scapula, covering the supraspinatus, and the whole 

 muscle is called the sterno-scapularis. In the Myomorpha the 

 arrangement is usually as in the Sciuromorpha. 



The Deltoid, Teretes, Supraspinatus, Infraspinatus, and 

 Suhscapularis have the typical sciuromorphine arrangement and 

 resemble the same muscles in Sciurus. 



Fig. 2. 



Carts Spu 



PANN<C£. 



Muscles of Patagium and Arm. 



Pect., Pectoralis ; Bi., Biceps ; Subclav., Subclavius ; Tens. Pat., Ooracc- 



patagialis. 



