The natural fracture lines coming from the back of the eye, cross the margin of the headshield (or cephalon) to the side (or proparian sutures in science jargon).

From the front of the eye the sutures from both sides run along the edge of the central raised area (or glabella) into each other, and do not cross the margin of the cephalon, resulting in yoked free cheeks (or librigenae).

The cephalon of Huntoniatonia has a broad, flat frontal margin, with an extension to the front, a bit like a dolphin.

The eyes are large half circles that originate from immediately posterior of the frontal lobe and end parallel to the front of the occipital ring.

They contain close to 30 vertical rows of up to 8 lenses in each on a slightly convex surface with a clear socket at the base and narrow ridge along the top.