In the fore-foot the ungual phalanx has its inferior surface limited externally by a circular border, while the same bone of the hind-foot has this surface a little narrower, more concave, and limited by two curved borders which unite anteriorly to form an angle-an arrangement which gives to the general outline of this region the form of the letter V. Articulations of the Posterior Limbs The Coxo-femoral Articulation.
"Artistic Anatomy of Animals"
Édouard Cuyer