Text-fig. 1—Right prefrontal of Albertosaurus cf. A. lancensis (LACM 23845) in dorsal (4), anterior (B), and lateral (C) aspects. The dorsal view shows the prefrontal in articulation with the frontal, that portion of the prefrontal covered by the frontal indicated by the broken line. In B and C the broken region of this prefrontal is reconstructed with the dashed line. Bar represents 1 cm. in An albertosaur from the Hell Creek formation of Montana

Text-fig. 1—Right prefrontal of Albertosaurus cf. A. lancensis (LACM 23845) in dorsal (4), anterior (B), and lateral (C) aspects. The dorsal view shows the prefrontal in articulation with the frontal, that portion of the prefrontal covered by the frontal indicated by the broken line. In B and C the broken region of this prefrontal is reconstructed with the dashed line. Bar represents 1 cm.