Levels of the transverse slices are indicated by arrows in Fig. 6. A1, section through the anterior part of the interorbital plate and endocranial cavity of KUVP 152144. A2, section through the middle part of the interorbital plate of KUVP 152144, no ventral part of the endocranial cavity preserved . A3, section through the posterior part of the interorbital plate of KUVP 152144, no suborbital shelf preserved. B, section through the anterior part of the interorbital plate and endocranial cavity of KUVP 56340. Scale bar = 0.5 cm. Abbreviations: cica, canal for internal carotid artery; il, inner layer of the endocranium; nc, notochordal canal; ol, outer layer of the endocranium. See Figs. 3 and 6 for other abbreviation.