"Mémoire sur l'Elpidia nouveau genre d'Holothuries," K. Sv. Vet. Akad. xiv. No. 8, 1877.
Gerould, "The Anatomy and Histology of Caudina armata," Bull. Mus. Comp. Zool. No. 56, 1895, p. 124.
"Structure, Physiology, and Development of Antedon rosaceus," Phil. Trans. Roy. Soc. 1866, pp. 671-756.
"On the Nervous System of Antedon rosaceus," Q.J.M.S. xxiv. 1884, p. 507.
Bather calls the side-plates "adambulacral." The name is unfortunate, as it suggests that the side-plates correspond to the adambulacrals of Asteroidea; but when the groove is closed the position and function of adambulacrals and covering plates is the same (Lankester's Treatise on Zoology, iii. "Echinodermata," 1900).