Two lacrimal bones form part of the medial wall of each orbit.
A tall crest rose from the lacrimal bone in front of each eye, similar to Albertosaurus and Daspletosaurus.
The lacrimal bone was not in contact with the frontal anymore, having been separated from it by the prefrontal bone.
Different subspecies can usually be distinguished by the relative lengths and shapes of their lacrimal bones.
Unlike Allosaurus, there was no prominent crest on the lacrimal bone in front of the eye.
The maxilla are partly concealed, covered by the lacrimal bone, but extend till around the hind margin of the eye.
The lacrimal bone of Telmasaurus has a single hole in it, as do those of other early varanoids.
Notharctus tenebrosus had a lacrimal bone that was positioned at the end of the orbit but not anterior to it.
Near the frontal, the lacrimal bones are unusually wide in comparison to their length.
Inside the lacrimal bones were depressions that may have held glands, such as salt glands.