Y/.7/.I/. T.I It I. K OF MUSCULAK IXSERTIONS. 321 



II. Ulna. 

 The ulua gives insertion : 



a. By its upper extremity (olecranoit) to the 



1. Long extensor of the fore-arm. 



2. Large extensor of the fore arm. 



3. Short extensor of tho fore-arm. 



4. Middle extensor of the fore-arm. 



5. Sni:ill extensor of the fore-arm, or ancuncus muscle. 



6. Oblique flexor of the metacarpus. 



7. Deep flexor of the phalanges, or perforana. 

 k By Us body, to the 



1. Short flexor of the fore-arm, or anterior brachiul muscle. 



2. Lateral extensor of the phalanges. 



D. BONES OF THE CAU1TS. 



Supercarpal Bone. 



The supercarpal bone, the only bone of the corpus which has muscular 

 attainments, gives insertion to two muscles: 



1. External flexor of the metacarpus, or posterior ulnar. 



2. Oblique flexor of the metacarpus. 



B. BOMBS OF THE METACABPU8. 



I. Principal Metacarpal. 



The principal rnetacarpal gives insertion to a single muscle : 

 Jiy itt superior extremity, to the 



Anterior extensor of the metacarpus. 



II. External Rudimentary Metacarpal. 

 This gives insertion to a single muscle : 



External flexor of the metacarpus, or posterior ulnar. 



III. Internal Rudimentary Metacarpul. 

 This gives insertion to two muscles : 



1. Oblique extensor of the metacarpus. 



2. Internal flexor of the metacarpus, or great palmar muscle. 



F. BOXES OF THE DIGITAL REGION. 



I. First Phalanx. 

 This gives insertion to two muscles : 



1. Anterior extensor of the phalanges. 



2. Lateral extensor of the phalanges. 



II. Second Phalanx. 

 This gives insertion to two muscles: 



1. Anterior extensor of the phalanges. 

 j. >ti|" rliriul flexor of tho phalanges. 



IIL Third Phalanx. 

 Tlu- third phalanx, or os pedis, gives insertion to t"<> muscles: 



1 Anterior extensor of tlif plialatigi-s. 

 _'. I ><.\> il.-xor of the phulangoa. 



Y 



