Ceritoturris pupiformis is a species of sea snail, a marine gastropod mollusk in the family Horaiclavidae.
The length of shell attains 4⅓ mm, its diameter 1⅓ mm.
The shell is oblong, narrow and almost pupiform. Its color is white and slightly red at the apex. It contains 8 whorls of which two in the protoconch. The whorls increase but slowly and the last three are of nearly the same width. They are divided at the suture by a fine keel, and a double series of largish and rather acute tubercles surround the middle. The small aperture measures about ⅓ the total length of the shell. The outer lip is thin. The siphonal canal is very short and narrow.
