[347]

Watson, Journ. R. Mic. Soc. 1890, p. 685; see also Dalyell, loc. cit. ii. p. 195.

[348]

Schmiedeberg, Mt. Zool. Stat. Neapel, iii. 1882, p. 373.

[349]

For pelagic forms, see Camille Viguier, Arch. de Zool. Expér. (ser. 2) iv. 1886, p. 347; also Reibisch, Die pelag. Phyllodociden u. Typhloscoleciden d. Plankton Exped. 1895.

[350]

Lankester, Journ. Anat. and Physiol. 1868, p. 114; and 1870, p. 119; see also MacMunn, "On the Chromatology of the Blood in some Invertebrates," Quart. J. Micr. Sci. xxv. 1885, p. 469.

[351]

For coloured pictures of worms consult Schmarda, "Neue wirbellose Thiere," 2nd part, 1861; Milne Edwards in Cuvier's "Règne Animal" (Ed. Disciples de Cuvier).