The name deep calcaneal bursa is selected in order to distinguish the bursa here described from the subcutaneous calcaneal bursa, and yet show the relation of the two bursae to each other.
While dissecting some knees under the supervision of Prof. Hans Virchow, more than twenty years ago, he demonstrated to me the trick of finding inconstant bursae. While dissecting a foot, I found a bursa not described in the anatomies. It lay between the flexor group of muscles of the foot and the long plantar ligament. Subsequent study showed it to be inconstant; in just what proportion of feet it occurs, I cannot say.
This bursa lies under the beginning portion of the abductor hallucis muscle, extending laterally to the point of origin of the flexor brevis digitorum. Beneath it lies the sheath of the tibialis posticus. The flexor hallucis longus and the flexor longus digitorum lie lateral to