Cerion (Strophiops) variabile Dall, 1905
"Cerion (Strophiops) variabile
new species. Pl. LVIII, figs. I, 6, 14.
Shell varying greatly in size, the typical form handsomely axially irregularly striped with opaque white, dark brown and light yellow brown; with two polished, partly transversely striate nuclear and eight subsequent polished whorls, of which the last is more or less distinctly ribbed, the preceding ones striate transversely or smooth, without spiral sculpture, umbilical chink almost closed. The body of the shell is subcylindric, the last whorl not contracted, sometimes very blunt as if truncate, the apex evenly arcuately domed, the apical portion not swollen. The peristome is simple, rounded, reflected, and the parietal part when fully adult is thick and continuous; the parietal lamina is sharp, and one-third of the whorl long; the axial lamina is well developed only behind the pillar, the latter often seeming destitute of a lamina when examined from in front. The measurements are as follows (U. S. Nat. Mus., No. 120,011):
Shell Aperture Max Diameter
Type form 24-21 7 9.5-10.5 mm.
Var. saurodon 38 13 13 "
Var. pupilla 15.5-20.0 5.0-6.5 5.5-6.5 " "