Aeginidae with sixteen stomach pouches; absent or degenerate peripheral canal system; eight primary tentacles and eight peronia; secondary tentacles on umbrella margin; sensory clubs with no otoporpae.
Hemispherical umbrella with central part fairly thick; large, circular stomach with sixteen rectangular pouches with indicationsof slight median clefts; eight large primary tentacles issuing at level of top of stomach, with peronia running to umbrella margin; 3-5 secondary tentacles on umbrella margin in each octant; one or two sensory clubs between adjacent secondary tentacles; deep brown or purplish black stomach pouches; umbrella up to 45 mm wide.
European waters; Atlantic.
