[402]

Dohrn, op. cit.

[403]

See pp. [120] and [135]. Willey, Amphioxus and the Ancestry of the Vertebrates, New York, 1894, pp. 30, 31.

[404]

Beard, Anat. Anz. ix. 1894, p. 485.

[405]

Newton Parker, op. cit. p. 135.

[406]

Giacomini, quoted by Swale Vincent, Journ. Anat. and Phys. xxxviii. 1903, p. 41.