"The Fate of the Body-cavities in the Metamorphosis of Asterias pallida," J. Coll. Japan, x. 1898, p. 239.
Yves Delage, "Elevage des Larves parthénogénétiques d'Asterias glacialis," Arch. Zool. Exp. (4) ii. 1904, p. 27.
"The Metamorphosis of Echinoderms," Quart. Journ. Micr. Sc. xxxviii. 1895, p. 45.
In the type figured (larva of Synapta digitata) the feelers are budded off directly from the ring-canal and alternate with the rudiments of the radial canal.
Observed in Plymouth, 1905.