Zeitschr. wiss. Zool. xxi. 1871, p. 421.

[528]

Fischer, Nouv. Arch. Mus. Paris, ii. 1866, p. 293.

[529]

Ehlers, Abh. Ges. Göttingen, xxi. 1876, p. 3, and Joyeux-Laffuie, (as Delagia) Arch. Zool. Exp. 2 sér. vi. 1888, p. 135.

[530]

Busk, "Challenger" Reports, Parts 30 and 50.

[531]

Hincks, Brit. Marine Polyzoa, Introduction, p. cxxxv.

[532]