ClipArt ETC
"Right Eyeball of Bird, seen from behind, showing the following muscles; a, rectus superior; b, rectus externus; c, rectus inferior; d, rectus internus; e, obliquus superior; f, obliquus inferior; g, quadratus; h, pyramidalis, with its tendon, k, passing through a pulley in the quadratus (as shown by dotted line) to keep it off the optic nerve, i, then passing around the edge of the ball to its insertion in the nictitating membrane." -Whitney, 1911

Right Eyeball of Bird

"Right Eyeball of Bird, seen from behind, showing the following muscles; a, rectus superior; b, rectus…