I HE SKELETON OF THE LOWER EXTREMITY 



139 



Centre of ossification 

 for the proximal 

 epiphyais of the 

 tibia 



FIG. 343. FROM A BOY STILL- 

 BORN AT FULL TERM. 



Body length, 21 inches. 



Centre of ossifica- 

 tion for the 

 distal epiphysis 

 of the tibia 



FIG. 344. FROM A BOY AGED 

 NINE AND A HALF MONTHS. 



._ Centre of 



ossification for 



the proximal 



epiphysia of 



the tibia 



Diaphysis 



' Diaphysis 



Interosseous space of 



the leg 

 Spatium interosseum 



cruris 



Centres of ossifica- 

 tion for the distal 

 epiphyses of the 

 tibia and fibula 



FIG. 345. FROM A BOY AGED 

 ONE AND A HALF YEARS. 



Centre of ossification 



for the proximal 

 epiphysis of the 

 fibula 



Distal epiphysis of th 

 fibula 



FIG. 346. PROXIMAL AND 

 DISTAL PORTIONS OF THE 

 FIBULA OF A GIRL AGED 

 FOUR AND A HALF YEARS. 



... Proximal epiphysis 

 of the tibia 



Tubercle of 



the tibia 



Tuberositas 



tibiae 



FIG. 347. PROXIMAL PORTION 

 OF THE TIBIA OF A GIRL 

 AGED FIFTEEN YEARS. 

 SAGITTAL SECTION. 



Distal 



epiphyses of 



the tibia 



and fibula 



FIG. 348. THE DISTAL PORTIONS 

 OF THE BONES OF THE LEG 

 OF A GIRL AGED FIFTEEN 

 YEARS. FRONTAL SECTION. 



Development of the Bones oi the Leg. 



18 2 



