- So-called senseclubs or cordyli found in a few Leptomedusae, especially in those genera in which otocysts are inconspicuous or absent (fig.
- Gonosome with free medusae or gonophores; the medusae typically with otocysts, sometimes with cordyli or ocelli (figs.
- The characteristic sense-organs are ectodermal otocysts, absent, however, in some genera, in which case cordyli may replace them.
- The cordyli are scattered on the ring-canal.
- " The Sensory Clubs of Cordyli of Laodice," Journ.