(Mayer, 1900)
Umbrella 5-7 mm high; manubrium wide; mouth with 4 recurved, folded lips; 4 broad, large, smooth edged radial canals entering manubrium through 4 wide, funnel-shaped openings; 4 perradial tentacles long, laterally compressed; 12 small rudimentary bulbs (occasionally 8 tentacles and rudimentary bulbs).