Disc very broad and short, rostral lobe moderately long (shorter in juveniles) and parabolic; skin smooth; teeth plate-like, in a single row in both jaws, those in lower jaw chevron-shaped; nasal curtain deeply notched centrally; spiracles large, visible in dorsal view; tail very long, 2.1–2.5 in DW. Colour: Dorsal surface greenish grey with numerous, similar size white to pale blue spots (occasionaly without spots or with spots confined to rear disc); ventral surface mostly white.