THE BONES OF THE UPPER EXTREMITY 91 



radial (outer side) to the ulnar (inner side), are: the 

 scaphoid, semilunar, cuneiform, and pisiform; those of 

 the lower row, enumerated in the same order, are: 



Scaphoid--.^ 

 Os magnum - . 



Trapezium 



Trapezoid-.. 



Metacarpal bo?2es_ 



FIG. 44 

 Bones of wrist 



.Semilunar 



...--Cuneiform 



Pisiform 

 Unciform 



Phalanx I" 



j 



PhelanxM- 



Bones of the hand. 



the trapezium, trapezoid, os magnum, and unciform. 

 Each bone presents six surfaces superior,, inferior, 

 anterior, posterior, internal, and external. The anterior 

 and posterior are rough for the attachment of ligaments. 



