Smith Woodward, Ann. Mag. Nat. Hist. (7), iii. 1899, p. 487.
Kershaw, Victorian Natural. xix. 1901, p. 62; Waite, Rec. Austral. Mus. iv. 1901, p. 263.
Alcock, Ann. Mag. Nat. Hist. (6), iv. 1889, p. 379.
Day, op. cit. p. 324. See also Stead, Journ. Mar. Biol. Ass. iv. 1895-97, p. 264.
Vertebrate Palaeontology, Cambridge, 1898, p. 32.