Canthal scales

In snakes, the canthals are the scales along the upper surface of the canthus rostralis. They are located behind the level of the prenasal/postnasal suture and before the supraocular.^[1] They are also described as being located along the edge of the crown between the internasals and the supraoculars.^[2] If these are large scales that contact each other along the midline, they are more properly referred to as prefrontals.^[1]

Intercanthal scales are located between the canthal scales.^[1]