BY CHARLES W. DE VIS, B.A. 309 



Flexor carpi ulnaris (fig. 4 — f. u.) — First head tendinous from 

 the olecranon and soon coalescing with the extensor carpi 

 ulnaris. Second or condylar head ironi the inner condyle forming 

 a round fusiform belly entirely separable from the first. The 

 common insertion is carneotendinous into the ulnar side of the 

 common tendon of the fiexor profundus. 



Flexor profundus digitorum (fig. 3 — f. p. d.) — The two condylar 

 heads of this muscle are separable, but with difficulty. They 

 quickly blend with the ulnar head, and in the large tendon common 

 to them is a sesamoid. The fourth or deep head rises fleshy from 

 the carpus, and is inserted into each tendon. The great tendon 

 runs up within the muscle as a rather stiff tongue, reminding one 

 of the semiossified tendons of birds. 



Extensor carpi ulnaris. — Rises tendinous from the outer condyle; 

 soon becoming confiuent with the olecranal division of the Flex. 

 c. u. is inserted into the pisiform and fifth metacarpal. 



Extensor carpi radialis (fig. 4 — e. r, — Tendinous from the outer 

 and hinder part of the outer condyle ; — besides its three tendons to 

 the second, third, and fourth metatarsals, it sends a fleshy slip to 

 the fascia over the fifth. 



Extensor ossis metacarpi pollicis. — From the distal third of the 

 ulna ;— inserted into the metacarpal of the pollex. 



Extensor proprius pollicis. — This is a thin band running on the 

 distal edge of the preceding from the ulna across to the pollex, 

 where it forms a tendon which proceeds along its upper surface to 

 the ungual phalanx. 



Extensor communis. — Feeble ; rising from the carpus, forms a 

 muscular pad hardly resolvable into distinct fascicles except at 

 their insertions into the bases of the digits. 



Adductor minimi digiti. — Distinct though small ; — rising by a 

 long tendon from the metacarpal of the pollex ; — inserted fleshy 

 into the distal end and radial side of the metacarpal of the fifth 

 digit. 



