MYOLOGY 



67 



craniad of the last. Origin is from the lateral epicondyle 

 of the humerus distad of the origin of the extensor digitorum 

 communis. The tendon divides and with those of the 

 last-mentioned muscle, passes beneath the transverse liga- 

 ment. The two divisions of the tendon then are inserted 

 upon the lateral side of the dorsum of digits four and five. 

 M. extensor carpi ulnaris (figs. 13, 15, 28) has origin 

 from the distal part of the lateral epicondyle of the humerus. 

 Passing along the dorso-cranial part of the shaft of the 



extens.dig. 5 trasxsuU^^l^i 



exte-us-cavpiubt. 



extenstcarpv vibi.- 

 i extens. dvoxom. 



^ ilex, 



IvxTtibrits. 

 fttX.poV 



ilCX.C^jpl rad. 

 Uex.dtg. su^iL 

 ilcx.die.ptoi.l 



'— ^4iUx. di^. -proi. a 



Fig. 15. Right manus of Teonoma, showing tendons and superficial mus- 

 culature. ^, Dorsal aspect. 5, Palmar aspect. 



ulna, insertion is by a tendon beneath the transverse 

 ligament and onto the lateral side of the base of meta- 

 carpus five. 



M. extensor carpi radialis longus (figs. 13, 15, 28) 

 is the most proximal muscle having origin upon the lateral 

 epicondyloid ridge of the humerus. Its tendon passes 

 with that of the extensor carpi radialis brevis over the 

 carpus mediad to its center and is inserted upon the medial 

 dorsum of metacarpus two. 



