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1903, Ralph Arnold, The Paleontology and Stratigraphy of the Marine Pliocene and Pleistocene of San Pedro, California, page 290:
314. Seila assimilata C. B. Adams. Plate IV, Fig. 8 Cerithiopsis assimilata C. B. Ad., […] Shell small, thin, turreted; nuclear whorls sinistral; whorls ten, ornamented with three prominent, sharp, equal, equidistant, raised spiral lines; interspaces between ridges crossed by numerous fine lirulas; suture indistinct; […]