<prompt> If the 4th infralabial is larger than others on either side, the snake may beCobraKraitViperCoral snake  <response>: If the 3rd supra labial is not touching eye and nasal shield, then look at the ventral aspect of head. If the 4th infra labial is larger than the others on either side, it is poisonous krait Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 511 