 Limbs strong, with compressed digits; the scales on the upper surface of the limbs much enlarged and very strongly keeled; third and fourth fingers equal, or fourth very slightly longer; fourth toe slightly longer than third, fifth extending beyond first.Tail rounded, much depressed at the base, covered with moderate-sized strongly keeled scales arranged in rings; its length equals 2.5 to 3 times the distance from gular fold to vent.Males with a large patch of thickened preanal scales and a patch of similar scales on the middle of the belly.