[445]

Romanes, "Jellyfish, Starfish, and Sea Urchins," Intern. Scientific Series, 1885, pp. 320, 321; Preyer, "Bewegungen von Stelleriden," Mitth. Zool. Stat. Neapel, vii. 1886-87, p. 22.

[446]

Preyer, loc. cit. p. 49.

[447]

Bronn's Thier-Reich, Bd. ii. Abt. 3, Buch ii. Seesterne, p. 617.

[448]

Beiträge zur Histologie der Echinodermen, Jena, 1889. Such spaces are always to be seen in Asterina gibbosa when preserved with corrosive sublimate or other acid reagents, but are absent when it is preserved with osmic acid and Mueller's fluid. Though corrosive sublimate is usually regarded as a neutral salt, its aqueous solution decomposes with the production of a certain amount of free hydrochloric acid.

[449]

"Beiträge zur Anatomie der Asteriden," Zeitschr. wiss. Zool. xxx. 1877, pp. 122 et seq.