155 



Figure 109: General view of the pluteus III stage. 



A — Prionocidahs baculosa (Mortensen, 1938); B — Lovenia elongate (Mortensen, 1937). 



ad — anterodorsal arm; al — anterolateral arm; asp — aboral spicule; pd — posterodorsal 



arm; pi — posterolateral arm; po — postoral arm; pr — preoral arm. 



