Dear Carol,
 
E. pourtalessi (Verrill & Bush, 1880) from the western Atlantic is now
considered to be a synonym of E. celesti (Aradas, 1854) from the eastern
Atlantic and Mediterranean Sea. See Bouchet  & Waren 1986-  Revision of the
Northeast Atlantic Bathyal and Abyssal Aclididae, Eulimidae, Epitoniidae
(Mollusca, Gastropoda).
 
It is an offshore species.  In the western Atlantic, there are records of it
having been found at depths of 50 to 350 fathoms (Clench & Turner, 1952).
 
It is a distinctive species, characterized by a broad shell, open umbilicus
and almost disjunct whorls. The sculpture consists of thin erect costae with
peaks below the sutures and dense spiral lines between the costae which can
been seen under 10x magnification.
 
It has a superficial resemblance  to E. krebsii (Morch, 1874) from the western
Atlantic.  However, it can be easily distinguished from E. krebsii which lacks
the dense,  fine spiral lines between the costae.
 
Hope this helps.
 
Sincerely yours,
 
Lenny Brown