Brit. Mus. Cat. part ii. 1854, p. 106; Hincks, t. cit. p. 181 n.

[538]

p. [475].

[539]

Barentsia Hincks (= Ascopodaria Busk) differs from Pedicellina in that each stem has a muscular swelling at its base. The genus is represented by two British species, B. gracilis Sars and B. nodosa Lomas.

[540]

Arch. Zool. Exp. 2 sér. ix. 1891, p. 91.

[541]

For structure, see Davenport, Bull. Mus. Harvard, xxiv. 1893, p. 1.

[542]