THE SKELETON OF THE FKOG. THE FOOT. 167 



The foot includes five complete digits and a supplemental 

 toe as well. Each of the five digits consists of a long meta- 

 tarsal with epiphyses at both ends, and of a variable number 

 of phalanges. The first digit or hallux and the second have 

 two phalanges, the third three, the fourth, which is the largest, 

 four, and the fifth, three. The distal phalanges have epi- 

 physes only at their proximal ends, the others at both ends. 



On the pre-axial side of the hallux is the supplemental 

 digit, the prehallux or calcar. It consists of a short meta- 

 tarsal and one or two phalanges, and is terminated distally by 

 a horny covering of epidermal origin. 



