The present work was carried out on! twenty thoracic limbs of adult healthy donkeys as well as four' living animals. It showed that the flexor muscles of the manus have four tendon sheaths. The position, relation, length, width and the sites of injection of these sheaths were determined. This study also revealed that there is no communication between the tendon sheaths and the neighbouring
synovial structures as joint cavities and bursae which are of great importance from the surgical point of view.