On the anatomy of the Cyprinids, cf. Sagemehl, Morphol. Jahrb. xvii. 1891, p. 489.
Cf. Boulenger, "Poissons du Bassin du Congo," p. 238 (1901).
In Exostoma these bones are two in number and so elongate as to resemble the condition characteristic of the Pediculati.
Proc. Canad. Inst. (2) ii. 1884, p. 376.
Cf. Bridge and Haddon, Phil. Trans. R. Soc. clxxxiv. 1893, p. 65.