von Graff, "Myzostomida," "Challenger" Reports, part 27, vol. x. 1884; and "Supplement," part 61, vol. xx. 1887.

[398]

Marenzeller, Anz. Akad. Wien, xxxii. p. 192.

[399]

Mt. Zool. Stat. Neapel, xii. 1896, p. 227; where, too, see literature.

[400]

Beard, Mt. Zool. St. Neap. v. 1884, p. 544.

[401]

Quart. J. Micr. Sci. (n.s.) vol. iv. 1864, p. 258; and v. pp. 7, 99.

[402]