6/13/15: It appears that the prior treatment of Lucapina adspersa (Philippi, 1845) as a synonym has gone by the wayside and the proper treatment should be Lucapina adspersa (Philippi, 1845) [= L. sowerbii auctores non (G. B. Sowerby I, 1835)].  I believe this means many past treatments confused Lucapina adspersa as the same as L. sowerbii.  However, as of 10/20/17 WoRMS accepts these as separate species.  The below presentation presents the shells accepted as Sowerby's  L. sowerbii.  See also Jaxshells.

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For another description of L. sowerbii and why there was confusion with L. adspersa, see remarks under                 L. sowerbii in the Johnsonia (pg. 15).

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