OSSIFICATION OF THE BONES OF THE FOOT. 1-1 



Fig. 109. 



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Fig. 109. — Ossification of the Bones of the Foot (R. Quain). 



A, right foot of a fu;tus of six mouths. The metatarsal bones and digital phalanges 

 have each their shafts ossified from their primary centres ; the tarsus is wholly cartila- 

 ginous, excepting the os calcis, in which the nucleus of bone has just appeared. 



B, foot of a fcetus of from seren to eight months. The astragalus shows an osseous 

 nucleus. 



0, from a child at birth ; the cuboid has begun to ossify. 



D, about a year old, showing a nucleus begun in the external cuneiform. 



E, in the third year ; ossification has reached the internal cuneiform. 



F, between three and four years old, showing ossification in the middle cuneiform and 

 scaphoid bones, and in the epiphyses of the metatarsal bones and phalanges. 



(i, about the age of puberty. Ossification is nearly complete in the tarsal bones ; an 

 epipliysis has been fonned on the tuberosity of the os calcis, and the epiphyses of the 

 metatarsal bones and phalanges are shown sepai'ate. 



1, nucleus of the os calcis ; 1* in G, the epiphysis of the os calcis ; 2, nucleus of the 

 astragalus ; 3, of the cuboid-; i, of the external cuneiform ; 5, of the internal cuneiform ; 

 G, of \he scaphoid ; 7, of the middle cuneiform ; 8, metatarsal bones ; S", distal epiphyses 

 of the four metatarsal bones ; S', proximal epiphyses of the first ; 9, first range of digital 

 phalanges ; 9*, proximal epiphyses of the four outer of these phalanges ; 9', that of the 

 first phalanx of the great toe flO, second range of phalanges ; 10*, the epipliyscs of these 

 phalanges ; 10', epiphysis of the terminal phalanx of the great toe ; 11, four terminal 

 phalanges ; 11*, their epiphyses. 



