[30] For this and other groups of extinct fish see A. Smith Woodward, Catalogue of Fossil Fish in the British Museum, Parts I.-III. London, 1889-95.
[31] See p. 127.
[32] See B. Dean, J. Morphol. vol. IX. pp. 87-114, 1894, and Nat. Sci. vol. VIII. p. 245, 1896.
[33] A. Günther, Phil. Trans. vol. 161, Part II. 1871, p. 511. T.H. Huxley, "On Ceratodus and the classification of fishes," P.Z.S. 1876, p. 24.
[34] See Marshall and Hurst's Practical Zoology, 4th ed. London, 1895, p. 214.
[35] See T.J. Parker's Zootomy, London, 1884, p. 86.
[36] See W.K. Parker and G.T. Bettany, The Morphology of the Skull, London, 1877, chap. 3.
[37] T.J. Parker, Zootomy, London, 1884, p. 91.
[38] According to G. Swirski, Schultergurtel des Hechtes, Dorpat, 1880, the true coracoid is aborted, and the so-called coracoid of Teleosteans is really the precoracoid.
[39] The following general works on fishes may be referred to: Bashford Dean, Fishes, Living and Fossil, New York, 1895. A. Günther, An Introduction to the Study of Fishes, Edinburgh, 1880. A.A.W. Hubrecht and M. Sagemehl, Fische in Bronn's Classen und Ordnungen des Thierreichs, Band VI. Leipzig, 1876.