Cerion pygmaeum Pilsbry and Vanatta, 1896
"Shell small and rather thin, varying from cylindric to short oval. Whorls 7 to 8½, the latter 2 to 3 of subequal diameter, those above forming a stumpy (often very short) cone. Rusty brown. Surface regularly costellate; apical whorl smooth, next whorl finely and regularly striated. Last whorl ascending as usual in front, having a very short umbilical rimation below.
Aperture brownish within, rounded, obliquely truncate above. Peristome white, blunt, slightly expanded; parietal callus thin. Axial fold inconspicuous; parietal tooth deep within and extremely small.
Alt. 10, diam. 6⅓; alt. of aperture 4 mm.
Alt. 12, diam. 7; alt. of aperture 5 mm.
Alt. 15⅔, diam. 7½; alt. of aperture 6 mm.
Alt. 14⅔, diam. 6⅓; alt. of aperture 5 mm.
The short, typical form of this variety is extremely peculiar in shape, being shorter than any other Cerion. Longer examples are more like C. tenuilabre, of which we consider it a small variety. Many specimens are before us." (Pilsbry & Vanatta, 1896:334-335).