THE SKELETON 47 



intermedium like the ulnare in the carpus. The intermedium (o.i.) 

 is a wedge-shaped bone of which the thinner edge projects between 

 the tibia and fibula, thus separating the distal ends of these two bones. 

 Distally it articulates with the centrale, fibulare, and tibiale. Its 

 post-axial border is slightly notched to allow the A. perforans tarsi to 

 pass from the ventral to the dorsal side of the ankle. The tibiale 

 (c.t.) is the smallest element of the proximal row. It is helmet- 

 shaped and articulates with the tibia, intermedium, centrale, and 

 the cartilago pre-hallucis. Normally it remains cartilaginous. The 

 centrale (o.c.) is very large and articulates with all the other elements 

 of the tarsus except the basal tarsal of the fifth digit. The basalia of 

 the tarsus are strictly comparable with those of the carpus. The pre- 

 axial represents the basal of 2. pre-hallux (c.pr.h.), the next is a basale 

 commune (o.b.t. i +2) bearing the first two digits, while the remaining 

 three are smaller, each supporting one digit only. All become more 

 or less ossified except the basal of the pre-hallux. The meta-tarsals 

 2ind. phalanges are all dumb-bell-shaped bones and the digital formula 

 is 1.2.3.3.2. 



BIBLIOGRAPHY OF SECTION III 



8,9, 11,24,33,63,71,81,82,84, 109, 148, 163, 167, 170, 171, 172, 196, 

 202, 203, 204, 215, 216, 221, 224, 225, 227, 229, 230, 231, 232, 251, 257, 

 258, 260, 267, 329, 330, 344, 345, 365, 367, 370, 371, 374, 41 1, 426, 427, 

 432, 456, 460, 488, 490, 491, 494, 495, 499, 506, 519, 535, 557, 561, 562, 

 569, 571, 590, 591, 607, 713, 714, 716, 717, 718, 721, 729, 740, 757, 764, 

 766, 767, 783, 787, 788, 790, 791, 792, 793, 8i I, 812, 813, 814, 815, 816, 

 817,818,840. 



