[362]

Jourdain, Ann. Sci. Nat. (4), xii. 1859, p. 321; M‘Kenzie, Reprint from the Proc. Canadian Institute (N.S.) ii. 1884, p. 428. For references to Hyrtl and other writers, see Jourdain, op. cit.

[363]

Balfour, Comparative Embryology, London, ii. 1881, pp. 66, 91, and 96.

[364]

A subintestinal vein is also present in adult Holocephali (e.g. Callorhynchus antarcticus), T. Jeffery Parker, op. cit. p. 706. The persistence of this vein in adult Fishes is associated with the presence of a well-developed spiral valve.

[365]

Budgett, Trans. Zool. Soc. xiv. Pt. vii. 1901, p. 332.

[366]

Günther, Phil. Trans. 161, 1872, p. 535; Baldwin Spencer, Macleay Memorial Volume, 1894, p. 17.