? Eutima gracilis (Forbes & Goodsir, 1851)

Remarks: the record of this species on the Argentinean coast needs to be confirmed (see Genzano et al. 2008a). Distribution in South America: medusa—Atlantic Ocean, Argentina, at 38° S 57.51° W (Zamponi & Suarez 1991; Genzano et al. 2008a).