FIGURE 16 in Illustrated Key to the Snakes of the Philippines

FIGURE 16. Lateral view of head of Emydocephalus annulatus (specimen number unknown; a redrafting by EH of original image in Rasmussen et al. 2011). Second supralabial scale (reddish brown). Fig. 16, modified original line drawing reproduced with permission of A. Rasmussen and Zootaxa and Magnolia Press.