FIGURE 36 in Illustrated Key to the Snakes of the Philippines

FIGURE 36. Ventral view of head of (A) Hydrophis schistosus (specimen number unknown; a redrafting by EH of original image in Rasmussen et al. 2011), (B) Hydrophis curtus (KU 40063). Mental scale (green), and either elongate (A) or triangular (B). Fig. 36A modified original line drawing reproduced with permission of A. Rasmussen and Zootaxa and Magnolia Press.