[397]

Newton Parker, op. cit. p. 135.

[398]

Quoted by N. Parker, l.c.

[399]

Van Bemmelen, Anat. Anz. iv. 1889, p. 400.

[400]

W. Müller, op. cit.

[401]

Dohrn, Mitth. Zool. Stat. Neapel. v. 1884, pp. 141-151; see also the previously cited works of De Meuron and Maurer.