774 MAMMALIAN ANATOMY 



T-shaped in outline, the cross-bar on the dorsal side, the vertical bar 

 directed toward the plantar and tibial sides. The fibular margin is 

 more completely and more deeply emarginated than is the tibial 

 margin. The surface is almost flat, and articulates with the distal 

 surface of the ectocuneiform. 



The dorsal surface (Fig. 593) is quadrate, and lacks the hook on 

 the median side which characterizes the third metacarpal. It is gently 

 convex transversely, and flat or slightly concave from the proximal to 



the distal end. 



FIG. 593. 

 Proximal End. 



With Ectocuneiform. 



Tibial Side. If j Fibular Side. 



THIRD LEFT METATARSAL, DORSAL SURFACE OF BASE AND 



PART OF SHAFT. 



The tibial surface (Fig. 594) has two convex prominences on the 

 proximal border which are separated by a deep groove. They articu- 

 late with the lower halves of corresponding depressions on the fibular 



FIG. 594. 

 Proximal End. 



With Ectocuneiform. 



With Second 



Metatarsal. 



Plantar Side. W\l Dorsal Side 



THIRD LEFT METATARSAL, TIBIAL SURFACE OF BASE AND 

 PART OF SHAFT. 



side of the base of the second metatarsal. In the separating groove 

 are inserted strong ligaments from the adjoining bones. 



The narrow plantar surface (Fig. 595) is prolonged at the proxi- 

 mal end into a strong, rounded prominence. 



The fibular surface (Fig. 596) presents, on the proximal border 

 at the dorsal end, a convex strip for the attachment of a ligament. 



