THE SKELETON. 



79 



enlarged and presents smooth surfaces which meet the bones 

 of the leg. These latter are two in number, known as the 

 tibia, c, or shin-bone, and fibula, d; the tibia being on the 

 great-toe side. In front of the knee-joint is the knee-cap, or 

 patella, b. 



FIG. 33. FIG. 34. 



FIG. 33. The hones of the arm. a, hunierus; 6. ulna; c, radius; d, the carpus; 

 e, the fifth metacarpal; f, the three phalanges of the fifth digit (little finger); g, 

 the phalanges of the poliex (thumb). 



FIG. 34. -Bones of the leg. a, femur; 6, patg.Ha; c, tibia: d, fibula; h, calca- 

 neum; e, remaining tarsal bones; /, metatarsal bones; g, phalanges. 



At the distal end of the leg-bones comes the foot, consist- 

 ing of tarsus, metatarsus, and phalanges. The tarsus, which 

 answers to the carpus of the fore limb, is made up of seven 

 irregular bones, the largest being the heel-bone, or calcaneum, 



