（Πληϊόνη), a daughter of Oceanus, and mother of the Pleiades by Atlas. (Apollod. 3.10.1; Pind. Fragm. 53; comp. ATLAS; PLEIADES.） [L.S]
William Smith. A Dictionary of Greek and Roman biography and mythology. London. John Murray: printed by Spottiswoode and Co., New-Street Square and Parliament Street. In the article on Soranus, we find: "at this present time (1848)" and this date seems to reflect the dates of works cited. 1873 - probably the printing date.