226 



DETAILED SYNTHESIS. 

 FIG. 170. 



Fig. 170 represents bones of lower leg. 1, Tibia ; 4, surface, joined to 

 thigh-bone; 2, point of inner ankle (internal maleolus); 9, Fibula; 10, end 

 attached to tibia; 11, (external maleolar process) outer ankle. 



379. THE ANKLE (tarsus) is CONSTRUCTED of seven 

 bones, of which only one enters into the ankle-joint. 

 The ankle-bone (Astragalus) joins and rests upon the 

 heel-bone (Calcaneum) behind, and the boat-shaped 

 (Scaphoid) bone in front, which is jointed in front to 

 the three wedge-shaped (cuneiform) bones, the outer 

 one of which is jointed to the cnbe-shaped (cuboid) 

 bone that reaches back to the calcaneum. 

 FIG. in. 



Fig. 171 represents, 1, lower end of 

 tibia ; 2, fibulae ; 3, 3, astragalus ; 4, cal- 

 caneum ; 5, cuboid. In front of 3, part 

 of scaphoid ; in front of it one, and part 

 of another cuneiform. The metatarsus 

 is seen extending from the cuboid and 

 cuneiform ; 6, 7, 8, 9, ligaments. 



380. THE TAESAL BOXES are half the length of the 

 foot, and, near their middle, jointed with the leg. They 

 are mostly composed of spongiform bone, with a thin, 

 dense layer, having many perforations for vessels. (See 

 Figs. 1, 2, 3, PL 15.) 



381. THE TAESAL BOXES ARE IXTERLOCKED with the 

 five bones (metatarsal) forming the frame of the foot, 

 the front ends of which descend to the ground, and join 



Describe Fig. 170, 879. How ? Describe Fig. 17L 380, What aaid of ? 

 KL How ? 



