POSTERIOR EXTREMITY. 51 



which are connected with the fourth and fifth metatarsal bones. Its 



anterior face measures five inches by one and three-fourths in its widest 



part. 



Metatarsus. — The bones of the metatarsus are fire in number (Plates Meta- 

 tarsus. 

 XIII. and XIY. K). Differing from the human, the middle metatarsal is 



the longest and thickest, next the fourth, then the second, the fifth, and 

 lastly the first, which is the smallest of the five. These bones have nearly 

 the same form, with the exception of the fifth, which has less of the charac- 

 ters of the metatarsal bones than the others. The first metatarsal bone 

 is two inches and a half long ; the second, four ; the third, five and a half ; 

 the fourth, five ; and the fifth, three and a half. The circumference of the 

 largest, or middle metatarsal, is eight -inches. Their transverse diameters 

 increase regularly from the first to the last. 



The first metatarsal is articulated with the inner cuneiforme ; the 

 second with the middle ; the third with the middle, to a very small extent, 

 but chiefly with the external ; the fourth with the external and cuboides ; 

 the fifth with the cuboides. All these connections are by flattened surfaces, 

 the first being less so than the others. The phalangean extremities pre- 

 sent a condyloid arrangement ; having an eminence on each side, with an 

 excavated surface for adaptation with the metatarsal surface of the first 

 phalanx. 



Phalaxges. — The phalanges are supposed to be three in number in Phalanges. 

 each toe, except the great. The first phalanx (Plates XIII. and XIY. L) is 

 very thick, short, and irregular, in the second, third, fourth, and fifth toes. 

 In the middle toe, this phalanx is of a quadrangular form ; rough above, 

 below, and at its edges. Posteriorly it is articulated with the middle 

 metatarsal by an excavated surface ; anteriorly with the second phalanx by 



