452 RICHARD S. LULL 



ison would be most interesting. All of the elements are present in 

 the carpus, with the exception of the trapezium, of which the last 

 vestige has disappeared. The proximal facets are shown in Fig. i 

 of Plate IV, though the limits of the radial and ulna areas are not 

 with certainty definable. 



The scaphoid articulates with the lunar by two facets separated 

 from each other by a roughened trough. The superior scapho- 

 lunar facet is long and narrow, its short axis vertical and straight, 

 while its longer axis sweeps to the rear in a gentle convexity. It has 

 the same antero-posterior extent as the scapho-radial facet above. 

 The inferior scapho-lunar facet is much smaller, having but half the 

 fore and aft extent of the superior. Distally the scaphoid articulates 

 with the trapezoid and the magnum, and together with the lunar 

 forms the deep groove into which the pully-like pivot of the magnum 

 fits. 



The lunar is a somewhat larger bone than the scaphoid, articu- 

 lating distally both with the magnum and the unciform. The articu- 

 lation between the lunar and cuneiform is again double, the two 

 facets being separated by a well-defined channel, which runs back- 

 ward and slightly upward. The two lunar-cuneiform facets are 

 about equal in area. One can form a very good idea of the distal 

 lunar facets by the study of their complementary facets figured in 

 Plate IV, Fig. 2. 



The cuneiform is about half the bulk of the lunar, and presents 

 two facets on its inner face in every way the complements of the lunar- 

 cuneiform. On the proximal face there is a large, saddle-shaped 

 facet for the ulnar, and a smaller, semicircular, cuneiform-pisiform 

 facet in the rear, set almost at right angles with the plane of the first. 

 Distally there is a large cuneiform-unciform facet, having the general 

 form of an equilateral triangle with rounded angles. It is again 

 saddle-shaped, concave in its fore and aft axis. 



The pisiform is lacking from the right manus, but that of the left 

 is present and well preserved. It is much compressed laterally, 

 with a deep vertical expansion of the distal end which is decidedly 

 rugose. The bone presents a gentle, sweeping curve through an arc 

 of nearly 90 . Proximally it bears two well-defined contiguous facets 

 for articulation with the cuneiform and ulna respectively. 



