Traquair, Geol. Mag. (3) iv. 1887, p. 248; Smith Woodward, Brit. Mus. Cat. Foss. Fishes, iii. 1895, p. 23.
Jordan and Evermann, "Fishes of North and Middle America," Bull. U.S. Nat. Mus. No. 47, Pt. i. 1896, p. 101.
Jordan and Evermann, op. cit. p. 102.
Day, Fishes of Great Britain and Ireland, ii. 1880-84, p. 282.
Id., op. cit. p. 279.