There are two serpent masks in this photo, one underneath the other. The serpents face toward the right with their spiral eye in the upper left square area. An upturned nose with tiny fangs below can be seen in the middle of the design. The right side of the design features either flames or vegetation which sprout from the figure's forehead and drape down in front of the face. These sprouts are terminated with two circular upside-down Ahau heads. Because of the forehead appendages, this design is harder to "read" than the other two designs in the series.
Similar abstract serpent motifs can be seen at Hochob, Ek Balam, elsewhere at Chicanna, Becan, and many other places.