766 



MAMMALIAN ANATOMY 



The distal surface (Fig. 584) is ear-shaped and concave, and artic- 

 ulates with the base of the fourth metatarsal. The arcuate borders are 

 on the dorsal, fibular, and plantar sides, and the emarginate border is 

 on the tibial side. The emargination on the tibial border is due to a 



FIG. 583. 

 Plantar Side, 



Hook of Ectocuneiform. 



Tibial 

 Side. 



Entocuneiform. 



Mesocuneiform. 



Ectocuneiform, 

 with Scaphoid. 



Fibular Side. 



Tuberosity of Fifth 



Metatarsal. 

 Cuboid, with Calcaneum. 



Dorsal Side. 



THE DISTAL ROW OF TARSAL BONES IN POSITION, PROXIMAL ASPECT. 



decided pit in the distal part of the tibial surface, in which is inserted 

 an interosseous ligament. All the borders of the surface are sharp, 

 except a portion of the fibular, which is flattened and turned to the 

 fibular side to articulate with the elevated base of the fifth metatarsal. 



FIG. 584. 

 Dorsal Side. 



Groove for PERONEUS LONGUS. 



Tibial Side. 



With Fourth 

 Metatarsal. 



With Fifth 

 Metatarsal. 



Fibular Side. 



Plantar Side. 



LEFT CUBOID, DISTAL SURFACE. 



The tibial surface (Fig. 585) is the third which is articular. Its 

 outline is irregular ; the dorsal border is nearly straight or slightly 

 emarginate ; the distal border is also emarginate, but more strongly, 

 and meets the dorsal and plantar borders at right angles. The proximal 

 border is oblique, running from the proximo-plantar angle dorsally 

 and distally. The greater part of the plantar border is deeply emar- 

 ginate ; in front of the middle is a projection, which is the end of the 

 elevated portion of the plantar surface, sometimes known as the tuber- 

 osity of the cuboid. The distal border of this projection is emarginate, 



