Dictionary of Ichthyology  

oculomotor and trochlear(is) nerves - see cranial nerves.

Eye muscles and nerves in a shark, a = abducens, om = oculomotor, t = trochlearis (nerves); oi = inferior oblique, os = superior oblique, re = external rectus (lateral), ri = internal rectus (medial), rif = inferior rectus, rs = superior rectus (muscles), from Kingsley's "Textbook of Vertebrate Zoology, 1906. Photograph by Brian W. Coad.

Canadian Museum of Nature