Observations and experiments were conducted on the West Indian wentletrap Epitonium albidum (Orbigny, 1842) to see how it grows, how fast it grows, and to determine whether one varix is grown per 24 hours. Combining aquarium with field data, and data on both sexes (epitoniids are protandric), growth data were obtained from 23 specimens. The best data set comes from 8 Barbados males that grew for longer than 5 days, in which the mean daily teleoconch length increment was 0.15 ±0.04 mm, and the mean number of ribs added per day was 1.2 ±0.5. Three females grew 0.33 to 0.50 mm/day in teleoconch length. The data show that E. albidum can grow extremely fast, but that there is no consistency about 1.0 rib being grown per day.