Cupid and Psyche is ATU 425B and is considered the earliest ATU 425 tale. I have three text versions of the story available on SurLaLune. The first is William Adlington's 1566 semi-direct translation of Apuleius' text at Apuleius' Cupid and Psyche from The Golden Ass, also known as The Metamorphoses.The second is the version written by Thomas Bulfinch in his Age of Fable at Bulfinch's Cupid and Psyche. The third is a shorter version written for children at A Child's Cupid and Psyche.
This tale is ATU-425, not ATU-425C. However, the tale is considered to be one of the first literary fairy tales and a direct ancestor of the French Beauty and the Beast tale. It is important enough to have included three versions of the tale on this website.
An English language version is available in:
Apuleius. The Golden Ass. Jack Lindsay, translator. Bloomington: Indiana University Press, 1962.
Amazon.com: Buy the book in hardcover or paperback.
Apuleius, and Petronius Aribiter, et al. The Golden Asse, Adlington's Translation, 1566. The Satyricon, Burnaby's Translation 1694. Daphus and Chloe, (by Longus) Thornley's Translation 1657. London: Simpkin Marshall, 1933.
Apuleius. The Most Pleasant and Delectable Tale of the Marriage of Cupid and Psyche. William Adlington, translator. Dorothy Mullock, illustrator. London: Chatto and Windus, 1914.
An e-text version of this book is available on Sacred-Texts.com at Cupid and Psyche.
Bulfinch, Thomas. "Cupid and Psyche." Bulfinch's Mythology: The Age of Fable. Boston: S. W. Tilton & Co. 1855.
Amazon.com: Buy the book in paperback.
Peabody, Josephine Preston, adaptor. "Cupid and Psyche." Good Stories For Great Holidays. Frances Jenkins Olcott, editor. Boston: Houghton Mifflin Company, 1914.