A, Calcareous ring,: r = radial piece, ir = interradial piece. B, Rods from base of tentacles. C, D Rods from tip of tentacle. E, Rosettes from ventral body wall. F, Rosettes from dorsal body wall. G, Elongated rod-like rosettes from dorsal body wall. H, Rosettes from tip of dorsal papillae. J, Rods from base of dorsal papillae.