PELVIC LIMBS 775 



This prominence overhangs a deep, rounded concavity, which is ad- 

 justed to a swelling on the tibial side of the base of the fourth meta- 

 tarsal. On the plantar side of the prominence is an oval, deeply 

 concave, articular surface for another prominent articular swelling on 

 the plantar side of the tibial surface of the fourth me ta tar sal. 



FIG. 595. 

 Proximal End. 



With Ectocuneiform. 



With Second 



With Fourth (fj!\\ Xlffii" Metatarsal. 

 Hetatarsal. 



Fibular Side. IHlH Tibial Side 



THIRD LEFT METATARSAL, PLANTAR SURFACE OF BASE AND 



PART OF SHAFT. 



Determination. The third metatarsal is distinguished by the 

 T-shaped proximal surface. If it be held with the base uppermost and 

 the plantar surface toward the student, the deep concavity on the fibular 

 surface of the base will be on the side to which the bone belongs. 



FIG. 596. 



Proximal End. 



With Ectocuneifarm. 



With Fourth, 



Metatarsal. .. , ._ 



Dorsal Side. t IJV Plantar Side. 



THIRD LEFT METATARSAL, FIBULAR SURFACE OF BASE AND 



PART OF SHAFT. 



Muscular Attachments. The third metatarsal affords origin, 

 by the proximal end of the plantar aspect, to the second plantar inter- 

 osseous muscle, and by each side of the shaft to the second and third 

 dorsal interosseous muscles. A part of the extensor brevis digi- 

 torum arises from the dorsal aspect of the base. 



THE FOURTH METATARSAL BONE. 



General Description. The base of the Fourth Metatarsal is 

 similar to the base of the fourth metacarpal. It differs from the base 



