Situated behind the stifle-joint, over which it passes obliquely downward and inward in close contact with the upper extremity of the tibia.

Origin. - From the external condyle of the femur by a short tendon which is lubricated with synovia in passing over the joint.

Insertion. - Into the upper and posterior part of the tibia.

Action. - To flex the tibia on the femur, and rotate it inwards.