Wall panel showing conventionalized stone sculpture which was once covered in plaster. There are two serpent masks in this photo, one underneath the other. The serpents face toward the right with their spiral eye (complete with eyelashes) in the upper left square area. They have open mouths with an up-curved lower jaw. Inside the mouth a forked tongue or pair of fangs can be seen. Even though these serpent motifs are extremely abstract, with a little practice the eye can be trained to make out the patterns.
Similar abstract serpent motifs can be seen at Hochob, Ek Balam, elsewhere at Chicanna, Becan, and many other places.