As Strombiformis healeyi
Shell minute, regularly elongate-conic, smooth, polished, uniformly pale brown, with the appearance of a darker subsutural band caused by the basal portion of the preceding whorl shining through the upper portion of the following whorl; whorls 8, early whorls well rounded, later whorls flattened, sutures indistinct; periphery obscurely angulated; base short, well rounded, aperture broadly oval; outer lip slightly thickened at the edge, decidedly protracted or drawn forward in the middle; inner lip short, curved, reflected and appressed to the base posteriorly; parietal callus thin. The type measures: length, 2.1 mm; diameter, 0.6 mm.
Holotype: No. 742 (Calif. Acad. Sci. Paleo. Type Coll.), from Loc. 27,229 (C.A.S.), dredged in from 3 to 9 fms. in Bahia Honda, Panama. L. G. Hertlein collector. Seven additional specimens were dredged at the same locality.
This minute species is probably nearer to Strombiformis burragei Bartsch from the Gulf of California than to any other west coast species. It differs in the smaller size, more slender form, and in the protracted outer lip.
This species is named for William Healey Dall whose work has added so much to our knowledge of west American mollusks.