Helicostyla cincinniformis: Imperforate, ovate-pyramidal, rather thin; white or very pale buff, having dark brown bands above and below the sutures, at the periphery and around the columella; the subsutural and frequently the peripheral band tessellated with hydrophanous yellow spots.
The spire is elevated, but rather wide. Apex obtuse, purple or white; whorls 5,75, slightly convex, the last angulated more or less distinctly at the periphery. Aperture oblique, showing the bands distinctly inside. Peristome thin, distinctly but very narrowly expanded, white, stained with purple at the terminations of the bands. Columella straight above, somewhat truncate below. Alt. 48, diam. 27; aperture, alt. 20 mill.
Luban, Philippines.
This species is closely allied to C. cincinna and C. subcarinata. It differs constantly from the variety romblonensis of the former species in being a less elongated shell, thinner in texture, and with thin, narrowly expanded lip, and in having the upper part of the spire decidedly stouter.