Everettia jucunda (Pfeiffer, 1863)  

Shell medium-sized, rather thin, brownish, moderately elevated, outer whorls rounded. Periphery rounded. Above the periphery, shell shiny with a regularly and densely placed spiral striation, c. 30–40 per mm. Below the periphery, shell has fine, densely placed spiral grooves. Height up to 10.5 mm; width up to 17.3 mm; diameter of the first three whorls 0.8–0.9, 0.6–0.7, and 0.8–0.9 mm, respectively; number of whorls up to six and three-quarters; height aperture up to 7.7 mm; width aperture up to 9.8 mm.