Torrey, 1909
Umbrella 20-30 mm wide, 3-4 times as wide as high; mesoglea thin; with very short, conical peduncle reaching about limit of bell margin; manubrium very short; mouth with very short crenulated lips; gonads linear from basal part of peduncle almost to bell margin; 16-28 (sometimes more) tentacles with elongate conical bulbs; between successive tentacles, 3-9 triangular rudimentary bulbs, 3-9 scattered marginal cirri, and 2-5 statocysts; no lateral cirri.