Animal with, the eye-peduncles very long and thick, connate with the tentacles nearly to their tips. Shell of moderate size, turriculated, conic ; spire varicose, very often with truncated apex. Whorls narrow, convex, with a rather deep suture, ornamented with axial costae, which are but little arcuate and sometimes crossed by spiral cords. Height of aperture one-third or one-fourth of the total length if the shell is not decollated. Last whorl generally carinated or angled at the periphery of the base, which is plane or oblique ; the axial ribs are not continued upon the base. Neck very short or subobsolete, slightly excavated. Aperture subcircular. Peristome reflexed, with a slight parietal channel. Siphonal canal reduced to a lateral beak. Outer lip broadly rounded, thickened. Columella smooth, neither twisted nor plicate, obliquely truncate.
These molluscs are amphibious, crawling on the stones and leaves in the neighbourhood of brackish water in mangrove swamps, and at the mouths of rivers ; during the dry season they close the aperture with the operculum, and hang, suspended by glutinous threads, to small branches and mangrove-roots.
Fossil in the Tertiary.