Sörensen, "Lydorganer hos Fiske," Copenhagen, 1884, p. 85; Kner, SB. k. Akad. Wiss. Wien, xi. 1853, p. 138.
Cuvier and Valenciennes, op. cit. v.
Günther, Brit. Mus. Cat. Fishes, ii. 1860, p. 313.
Moreau, Compt. Rend. lix. 1864, p. 436.
J. Müller, Ber. d. k. Akad. d. Wiss. Berlin, 1842, p. 177.