114 



BONES OF THE LOWER LIMB. 



Fig. 106. 



c 



D 



Fig. 106. OSSIFICATION OF THE BONES OF THE FOOT. 



A, right foot of a foetus of six months. 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 foetus of from seven to eight months. The astragalus shows an osseous 

 nucleus. 



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



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



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



F, from a child 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. 



Of, from a person of about the age of puberty. Ossification is nearly complete in the 

 tarsal bones ; an epiphysis has been formed on the tuberosity of the os calcis, and the 

 epiphyses of the metatarsal bones and phalanges are shown separate. 



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

 astragalus ; 3, of the cuboid ; 4, of the external cuneiform ; 5, of the internal cuneiform ; 

 6, of the scaphoid ; 7, of the middle cuneiform ; 8, metatarsal bones ; 8*, distal epiphyses 

 of the four metatarsal bones ; 8', proximal epiphysis 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 ; 10, second range of phalanges ; 10*, the epiphyses of these 

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

 phalanges; 11*, their epiphyses. 



