"31a. S. ALBICOSTATA.
Large 1.36 [34.54 mm] by .48 [12.19 mm]; cylindriconic, costae low, a little narrower than interspaces, 28 on ultimate whorl; frontal bar oblique. margin narrow, .05, lower tooth not long, but wider than one half its length. Rather pale brown, with costae white. Habitat Long Key southeast of Highburn Key .1000 collected. 5 cts." (Maynard, 1924c:2)