MAMMALIA. 4733 
postaxial border of the cuneiform. It may be a sesamoid 
or possibly a carpal bone. In the hind-limb the proximal 
tarsals are always three in number, the radiale and inter- 
medium are fused to form astragalus and the fibulare is 
Fig. 326.—DIAGRAM OF THE TYPICAL MAMMALIAN FORE- AND 
Hrnp-Lims, 
--HUMERUS -~ -FEMUA 
| “RADIUS -TIBIA 
1 
Lc ULNA LoFIBuLa 
, 
LUNARE. 
SCAPHOID, 
N 
7CUNEIFORM, ASTRAGALNS. Wa =CALCANEUM 
, 
ca 7 CUBOID, 
- 
Mp, CUNESFO, {\ ) 7 GHT.CUNEIFORM. 
- 
- % 
,UNCIFORM. NAVICULARY * 
, 
int. CUNELFORR 
OS MAGNUN, 
TRAPEZOB fs 
TRAPEZIUM 
METACARPALS. 
Note fusion of fourth and fifth distalia and limited number of phalanges. 
known as the cadcaneum. The centrale persists on the pre- 
axial side as the zaviculare. The distalia are the internal, 
middle and external cuneiform and the cuboid, the last being 
the fourth and fifth distalia fused together. In mammals 
the main joint of the hind-limb and foot is between the 
crus or tibiofibula and the proximal tarsals, hence it is a 
