Fig. 1.

Left bony labyrinth of the extinct thalattosuchian crocodylomorph Pelagosaurus typus (NHMUK PV OR 32599) based on CT data; (A) lateral view of the skull. (B) Transparent skull showing the position of the endosseous (bony) labyrinth; (C) lateral view; (D) medial view; (E) posterior view; (F) anterior view; and (G) dorsal view of the bony labyrinth. Abbreviations: asc, anterior semicircular canal; cc, crus commune; cd, cochlear duct; col, columella; lsc, lateral semicircular canal; psc, posterior semicircular canal; ve, vestibule. (Scale bars equal 1 cm.)