[440]

Gr. ἀστήρ, a "star"; εἶδος, "form." Linnaeus established the genus Asterias in 1766. Johannes Müller in 1842 used the name "Asteriden," and in System der Asteriden, 1842, by Müller and Troschel, the foundation of our knowledge of the group was laid.

[441]

Uexküll, "Die Physiologie der Pedicellarien," Zeitschr. f. Biol. xxxvii. 1899, p. 356.

[442]

Durham, "Wandering Cells in Echinodermata," Quart. J. Micr. Sci. xxxiii. 1891, pp. 81 et seq.

[443]

Starfish are most destructive on oyster-beds, and hence possess considerable negative economic value.

[444]

Mitth. des deutschen Seefischervereins, xii. 1896, p. 102, and J. Mar. Biol. Ass. iv. 1895-97, p. 266.