Two uncommon turrid species, Drillia dunkeri (Weinkauff, 1876) and Drillia enna (Dall, 1918), have been reviewed on the basis of examination of type material, material discovered in the USNM collection or procured by the author, and study of the literature. The review permits clarification of their taxonomic status, localities, and ranges. A third, common, species, Drillia regia (Habe and Murakami, 1970), confused originally with D. enna, is similarly clarified. Confused with Drillia dunkeri, Drillia umbilicata Gray, 1838, type species of the genus, and a species resembling it closely, Drillia patriciae Bernard, 1984 are also reviewed