Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 43746pr0001 Animal Body Part, Snake / Serpent Head, Basilisk with Dark Green, Dark Tan, and Light Gray Scales Print this part is a pair of it
• 43936pr0001 Animal Body Part, Snake / Serpent Body, Basilisk with Scales Print this part is a pair of it