Length, 1.25 mm; diameter, 0.5 mm. Shell: conic-ovate; smooth; transparent, white. Spire: about four convex, inflated whorls, the protoconch not marked off from the teleoconch; suture impressed, false margined. Sculpture: microscopic growth striae only. Aperture: ovate, slightly angled posteriorly; outer lip convex; peristome continuous; umbilicus a distinct chink. Operculum: oval; peg extending from the nucleus past the columellar edge; yellow-brown. Color: transparent, white in life; dead shells are opaque white. Animal: black.
These minute gastropods are locally abundant in tide pools and are often found in sediments where there are freshwater intrusions. The females deposit a single egg in a spherical capsule on the shell of another eatoniellid and the juveniles hatch without a functional velum (J. B. Taylor, 1975). Year-round breeding populations have been maintained in laboratory culture, the small mollusks feeding on algal film (J. B. Taylor, 1975).
Type locality: tide pool, Poipu Beach, Kauai. Holotype: Bernice P. Bishop Museum No. 9750. Paratypes: Australian Museum; British Museum (Natural History); U. S. National Museum.
The Hawaiian shells are distinguished from those of E. (C.) puniceomacer Ponder, 1965a, from New Zealand by the white color (the New Zealand shells are pink) and the more convex whorls and from E. (C.) perforata Ponder, 1965a, also from New Zealand, by the shorter spire. This species is named for Dr. Jane B. Taylor for her pioneering work on prosobranch veliger larvae in Hawaii.