PELVIC LIMBS 



759 



FIG. 573. 



Mesocunei 



long axis is almost vertical ; it is slightly concave, and faces toward 

 the fibular side of the foot as well as toward the heel. It articulates 

 with the oval facet on the tibial margin of 

 the distal surface of the scaphoid. 



The distal surface (Fig. 575) is more or 

 less pear-shaped ; the large end is on the 

 dorsal side, the narrow end points to the 

 sole of the foot. There is usually a decided 

 emargination on the fibular border above the 

 middle for the attachment of a strong inter- 

 osseous ligament. The distal surface articu- 

 lates with the proximal surface of the base of 

 the second metatarsal. 



The dorsal surface (Fig. 558) is nearly 

 square, or slightly longer than wide. Its 

 distal and fibular borders are straight and 

 meet at a right angle ; the proximal border 

 is straight, but runs somewhat obliquely from 

 the fibular end to the tibial side and toward 

 the heel. The tibial border is therefore 

 slightly longer than the fibular, and passes 

 from the distal end to the tibial side as well 

 as proxirnally. The dorsal surface is convex 

 from side to side, and rough for the attach- 

 ment of ligaments. It faces in a dorso-tibial 

 direction. Its tibio-proximal angle slopes to 

 the sole of the foot. 



The tibial surface (Fig. 576) also is in 

 general rectangular, and the disto-plantar angle is slightly produced. 

 The surface is for the most part rough and depressed for the attach- 

 ment of the strong ligament from the ectocuneiform. Its proximal 



FIG. 574. 

 Plantar Side. 



POSITION OF MESOCUNEIFORM. 



Tibial Side. 



With Scaphoid. 



Fibular Side. 



Dorsal Side. 



LEFT MESOCUNEIFORM, PROXIMAL SURFACE. 



