Cuninidae without peripheral canal system; no otoporpae.
Flat, disc-like umbrella with fairly thick smooth jelly, thin flexible margin, and 20-40 marginal lappets; large, circular stomach with 20-40 marginal pouches; 20-40 stiff tapering primary tentacles arising at upper ends of peronia, separating marginal lappets; 2-5 sensory clubs on each marginal lappet; umbrella up to 100 mm diameter, colorless or red gastric pouches.
