Rare and Remarkable Animals of Scotland, ii. 1848, p. 15.
Arch. Zool. Exp. 2 sér. x. 1892.
Kraepelin, Abh. Ver. Hamburg, x. 1887, No. ix. p. 19; κάμπτειν, to bend; δέρμα, skin.
Parts of the ectocyst of some calcareous forms are covered by an external investment of cells, which give rise to secondary thickenings, ridges, and other growths.
From the Quart. J. Micr. Sci. xxxiii. 1892.