Zapiski Acad. St. Petersb. vol. xi. No. 1, 1867 (Russian). Abstract in Arch. Naturg. Jahrg. xxxiii. 1867, Bd. ii. p. 235.

[498]

Caldwell, loc. cit. Foettinger, Arch. Biol. vol. iii. 1882, p. 679; Gegenbaur, Zeitschr. wiss. Zool. vol. v. 1854, p. 345; Krohn, Arch. Anat. Jahrgang 1858, p. 289; Metschnikoff, Nachricht. k. Ges. Wiss. Göttingen, No. 12, 1869, p. 227, and Zeitschr. wiss. Zool. vol. xxi. 1871, p. 233; J. Müller, Arch. Anat. Jahrgang 1846, p. 101; Schneider, Monatsber. Ak. wiss. Berlin, 1861, p. 934, and Arch. Anat. Jahrgang 1862, p. 47; Wagener, Arch. Anat. Jahrgang 1847, p. 202; Wilson, Amer. Natural. vol. xiv. 1880.

[499]

Proc. Roy. Soc. Edinb. vol. xxi. 1896, p. 59; and Zool. Anz. xix. 1896, p. 266.

[500]

The account given in the following pages has been deliberately restricted, for the most part, to British species. Our own fauna contains an assemblage of Polyzoa which is so representative that it has seemed better to do some justice to the British forms than to attempt to cover the whole ground in the limited number of pages devoted to this group. Those who desire to make a wider study of the subject should refer, for marine forms, to Busk's Catalogue of Marine Polyzoa in the Collection of the British Museum, Parts I.-III. 1852, 1854, 1875; to the Challenger Reports on Polyzoa, Parts 30 (1884), 50 (1886), and 79 (1888); for references and lists of species, to Vine's Report on Recent Marine Polyzoa, Cheilostomata and Cyclostomata (Report, 55th meeting Brit. Ass. Aberdeen, 1885, pp. 481-680); [and to Nickles and Bassler, Synopsis Amer. Foss. Bryozoa incl. Bibliography (Bull. U.S. Geol. Survey, No. 173, 1900)]. References to the literature of the fresh-water forms will be found below, in Chap. XVIII.

[501]

Hooker, quoted by Landsborough, Hist. Brit. Zoophytes, 1852, p. 346.

[502]