Xanthodaphne pompholyx is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

The color is yellowish white, with faint axially directed streaks and blotches of olive brown, and articulating dots of the same in the region of the siphonal canal.

The spiral sculpture consists of faint close-set scratches or half-obsolete minute threads more or less visible over the whole surface, and on the body whorl in front of the fasciole about twenty-five channelled sharply cut grooves separated by considerably wider flat interspaces.

The transverse sculpture consists of, on the fasciole, numerous little-elevated arched regularly-spaced ripples, with slightly wider interspaces.

The outer lip is rather straight in the middle, contracted suddenly to form the siphonal canal, the edge sharp, the sculpture transvisible, the notch shallow and its corners rounded off.