Traquair, Trans. Roy. Soc. Edinb. xxxix. 1899, p. 834.
Lankester, Monogr. Palaeont. Soc. 1868 and 1870; Smith Woodward, Brit. Mus. Cat. Foss. Fishes, ii. 1891, p. 176.
Traquair, Proc. Roy. Phys. Soc. Edinb. xii. 1894, p. 269.
Trans. Roy. Soc. Edinb. xxxix. p. 843 et seq.; Rep. Brit. Ass. 1900, p. 768.
See critical remarks by Smith Woodward, Geol. Mag. vii. 1900, p. 66.