Nassarius albescens, common name : the whitish nassa, is a species of sea snail, a marine gastropod mollusc in the family Nassariidae, the Nassa mud snails or dog whelks.

The subspecies : Nassarius albescens gemmuliferus (A. Adams, 1852) is a synonym of Nassarius gemmuliferus (A. Adams, 1852) ) (synonyms : Nassa (Niotha) albescens var. fenestratus (Marrat, 1877); Nassa (Niotha) fenestrata (Marrat, 1877); Nassa fenestrata Marratt, 1877; Nassa gemmulifera A. Adams, 1852; Nassa isabellei Reeve, 1853; Nassarius (Niotha) albescens gemmuliferus (A. Adams, 1852); Nassarius (Niotha) fenestratus (Marrat, 1877); Nassarius (Niotha) fenestratus var. gestroi Bisacchi, 1930; Nassarius fenestratus (Marratt, 1877);

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