Head scale nomenclature used here. A Nape clusters or tufts of mucronate scales B Temporal scales C Superciliaries D Canthal(s) E Scale(s) between nasal and rostral F Loreals G Keeled suboculars H Cluster of spines on the anterior edge of the auditory meatus I Clusters (or tufts) of spines on the ventral flap of the auditory meatus J Occipitoparietal scale K Supraocular plates L Intercanthal scales M Internasal scales N Circumorbital scales.