[475]

"Mitth. über die zool. Stat. v. Neapel," Zeitschr. wiss. Zool. xxv. 1875, p. 471.

[476]

Cuénot, "Études Morphologiques sur les Échinodermes," Arch. Biol. xi. 1891, p. 544.

[477]

"Jellyfish, Starfish, and Sea-urchins," Intern. Sci. Series, 1885, p. 302 et seq.

[478]

"Die Physiologie des Seeigelstachels," Zeitschr. für Biol. xxxix. p. 73.

[479]

"Bewegungen von Stelleriden," Mitth. Zool. Stat. Neapel, vii. 1886-7, p. 22.