448 APPENDIX. 



passes under annular ligament in a sheath ; appears to he attached to 

 two metacarpal hones. 



Palmaris longus, from the posterior margin of the internal 

 condyle, along with the deep and superficial common flexors, passes 

 under the superficial part of the annular ligament in the direction 

 of the pisiform hone ; expands into the palmar fascia. 



Flexor digitorum sublimis, from posterior margin of the internal 

 condyle with the palmaris longus and flexor profundus, hy a per- 

 fectly distinct head from the upper two-thirds of the inner margin 

 of the olecranon, and from the corresponding part of its anterior 

 surface ; this head joins the other head of the muscle about one- 

 third down the forearm. At the same level the common mass of 

 the flexor sublimis becomes detached from the palmaris longus and 

 flexor profundus, passes down to the carpus under the annular 

 ligament, with which its lower tendon is intimately connected. 



Flexor d. profundus, considerably more massive than the f. 

 sublimis, arises altogether from the internal condyle (its posterior 

 part and inner margin) ; it passes down, covered by palm, longus and 

 flexor sublimis, and underneath the annular ligament and tendon 

 of the superficial flexor. 



Flexor longus pollicis arises from the internal condyle, ante- 

 rior and inferior to the flexor profundus, terminates in a delicate 

 tendon at the lower third of the arm which passes underneath the 

 annular ligament along with the tendons of the other flexors. 



Flexor carpi idnaris arises from the inner, lower, and back part 

 of the surface of the olecranon, as a small conical muscle which 

 terminates in a cord-like tendon at the upper part of the arm, and 

 which passes down towards the pisiform bone under the deep flexors 

 of the fingers. The elongated pisiform bone, which passes consider- 

 ably inwards towards the annular ligament, co-operates with the 

 latter in forming the tendinous retinaculum. 



Anconeus, from the lower two-thirds of the posterior surface 

 of the elongated external condyle of the humerus, and separated 

 by a deep intermuscular space from the smaller external head of 

 the triceps. The fibres extend downwards, curving forwards, to be 

 attached to the whole external surface of the olecranon and the 

 external surface of the ulna half-way down. Some of the fibres 

 curve to the posterior aspect of the bone. 



