Cerion (Strophiops) canonicum Dall, 1905
"Shell stout, solid, whitish or pale brown, sub-cylindric, short, strongly sparsely ribbed and spirally striated. Nucleus prominent, of two and a half whorls, at first smooth then finely transversely striated; subsequent whorls six or seven, with a tendency to constriction a little in front of the suture; the penultimate whorl has about 20 nearly vertical ribs, the interspaces wider and more or less distinctly spirally striated; last whorl rising to the upper third of the whorl at the aperture which is large, with a thin callus on the body and a simple broadly reflected peristome; the umbilicus closed or nearly so; parietal lamina strong, long, extending three quarters of a whorl, axial lamina feeble. Extremes of measurement:
Height of Shell. Aperture Max. Diameter
30.0 11.0 12.0 mm.
27·0 9.0 13.0 "
Gun Cay, Wild Duck expedition. This species was erroneously identified as C. pannosum Maynard, which is devoid of spiral sculpture, and comes from south of Cuba. All but one of the specimens obtained were subfossiI. U. S. Nat. Mus., No. 127,460." (Dall, 1905b:439)