264 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
from it. The hoofs of digits 1m and Iv are united posteriorly by means 
of a horny pad. 
The carpus (Fig. /) consists of two rows of four bones each ; in the 
proximal row occur in succession, passing from the radial to the ulnar 
side, the scaphoid, lunar, cuneiform, and pisiform. In the distal row, 
which chiefly concerns us, the trapezium is most radial in position ; next 
III. IV. 
Fic. F’. — Left normal manus of pig, showing carpals and metacarpals. 1-yv, meta- 
carpals; cun., cuneiform; lun., lunar; os mag., os magnum; pis., pisiform; scph., scaphoid; 
trz. trapezium; trzd., trapezoid; un., unciform. x natural size. 
come in order the trapezoid, os magnum, and unciform. The trapezium 
(Fig. F, trz.) is rudimentary ; it articulates with the postero-lateral sur- 
face of the trapezoid and ends distally in a free, pointed process, which 
projects distad of the proximal extremity of metacarpal 1. The trape- 
zoid (trzd.) is functional but small. It articulates proximally with the 
scaphoid, distally with metacarpals 1 and m1. Its distal extremity is 
