| | IV. { XII. Eurystoma } 27. Beroida | Beroe { _Wide-mouthed_ } | =Comb-jellies= { | { XIII. Stenostoma { 28. Saccata | Cydippe +Ctenophora+ { _Narrow-mouthed_ { 29. Lobata | Eucharis { { 30. Tæniata | Cestum ---------------------------------------------------------------- Ctenophora Hydromedusæ Tæniata Lobata Rhizostomeæ | | | | | | \---v----/ Semæostomeæ Saccata DISCOMEDUSÆ STENOSTOMA | | Trachymedusæ | Siphonophora | | | | | | Lucernaria | | EURYSTOMA> | Calycozoa | | | | | | | | | | | | \-------------------------v----------------/ LEPTOMEDUSÆ Coralla | Octocoralla | Hexacoralla | | | | | | | | \----v----/ | Tetracoralla | Spongiæ | | Fibrospongiæ Calcispongiæ | | Chalynthina Leucones Sycones| | | | | | | | | | | | | | | | | Hexactinella|Geodina Dyssycus Sycurus | Hydroida | | | | | | | Cordylophora | | | | | | | | Hydra \------v---/ \-----v--/ | | | | | Ascones | | | | | Myxospongia | | \-----v-------/ | Halisarcina | | HYDROIDA | | | Procorallum | | | | | | CHALYNTHUS | OLYNTHUS | | | | | \-----v--------/ \------v----------/ Hydroida Archispongiæ | | |