FIGURE 11 in Additions to the morphology of the Phyllophoridae and the Sclerodactylidae. I. Type species of Phyllophorella, Selenkiella, Cladolella and Clarkiella, with the description a new species of Thorsonia (Holothuroidea: Dendrochirotida)

FIGURE 11. Clarkiella discoveryi Heding, in Heding & Panning, 1954, holotype (ZMUC-HOL 64). (a) specimen in lateral view; (b) top and (c) lateral view of tentacles; (d) anal papillae; (e–f) muscular system and gonads; (g) madreporite and stone canal; (h) photograph of the calcareous ring in outer view showing the insertion of the retractor muscle and (i) photograph of the calcareous ring in outer view showing the midIR (IR5), RIV and RV. Abbreviations: RM, retractor muscle, CM, circular muscle, LM, longitudinal muscle, GO, gonads, PV, Polian vesicle and M, madreporite, SC, stone canal. Plate identity follows the system established by Ludwig (1889–1892).