Voulta fusiformis, Swainson, Var. Micro-papillosa

Shell fusiform ovately-elongate, somewhat solid, contracted, and distinctly emarginate at the base ; spire very short, only about one-fourth the length of body whorl ; somewhat accuminate and minutely papillary at the apex ; whorls uniformly gently rounded or swollen, smooth, minutely decussately striated under the lens : columella with three very oblique moderately conspicuous plaits ; aperture rather narrowly elliptical ; lip markedly thickened and sub-reflexed, very much compressed over very narrowly receding posterior canal ; colour brownish white, reticulated with light chestnut triangularly configured lines as in V. fusiformis, columella and interior of the aperture uniformly orange-carnelia.
This shell, taken from the Derwent by Mr. Frank Rush, fisherman, forms an interesting link between V. fusiformis, Sw., and V. papillaris, Sw., although it is scarcely separable from the former species, of which it may be regarded as an extremely aberrant variety.