194 SKELETON. - 



bone. The knobbed extremity projects beyond the styloid pro- 

 cess of the radius. The other extremity, which is narrow, joins 

 the os lunare. 



Of the Lunare, (Semilunare.) 



This bone is at the ulnar side of the preceding, and may be 

 distinguished by the semi-lunated shape of the surface joining 

 the scaphoides. Its upper surface is convex where it articulates 

 with the radius; the lower face is concavely cylindrical. The 

 ulnar side is a plain surface which joins the os cuneiforme. Its 

 dorsal side is rather thinner than its palmar. 



Of the Cuneiforme or Pyramidale, (Pyramidal.) 



This bone is placed at the ulnar side of the last, and may be 

 distinguished by its representing somewhat a triangular pyra- 

 mid. The surface next the lunare is plane, but the other ex- 

 tremity, being the boundary of the wrist in that direction, is 

 rough. Above, it presents a small convexity, adjoining the 

 surface for the lunare, whereby it enters partially into the upper 

 wrist joint. Its inferior surface is concavo-convex, the con- 

 vexity being towards the ulnar end. On its palmar side it pre- 

 sents a circular plane surface for the os pisiforme. 



Of the Pisiforme, (Pisiforme.) 



This bone is placed on the front or palmar surface of the last, 

 and may be distinguished by its being smaller than any other 

 in the carpus, by its spheroidal shape, and by its presenting but 

 one articular face, which corresponds with one on the cunei- 

 forme. It is always so prominent as to be felt, without difficulty, 

 at the ulnar extremity of the wrist, and is very moveable. 



Of the Trapezium, (Trapeze.) 



This bone is placed at the radial end of the second row; its 

 shape is exceedingly irregular, but it may be generally distin- 

 guished by being a bone of the third magnitude as regards the 

 second row. It is better for the student to find out first the 



