Surfaces of the central and fourth fused tarsal bones showing proximal (A), ventral (B), medial (C), lateral surface (D), articular facets for calcanious bones. 1, foramen in the center of the bones more prominent on the ventral surface 2, articular facet for distal trochela of talus bone 3, articular facet for first, second and third fused tarsal (4,5,6 and 7).