[2] Snout somewhat longer than the distance between the eye and the ear-opening, nearly twice the diameter of the orbit; forehead concave; ear-opening small, oval, vertical, about one third the diameter of the eye; on the occiput very small round tubercles.

Eight to ten upper and seven to nine lower labials; mental large, triangular; two or three pair of chin-shields, median forming - a suture.

Body covered with small granules, intermixed with large keeled trihedral tubercles, arranged in 16-20 longitudinal series, the keels of the outer ones indistinct; the diameter of the largest tubercles on the flanks exceeds the diameter of the ear-opening.

Tail depressed, annulate, with rows of 8 or 6 spine-like tubercles, below with a series of transversely dilated plates.

Lower parts white; all the scales finely dotted with dark brown.