20 ACANTHOCEPHALA-PHORONIDA 



Phylum ACANTHOCEPHALA (thorny-headed worms) 



Order ARCHIACANTHOCEPHALA 



Macracanthorhynchus ; Gigantorhynchus ; Oncicola; 



Moniliformis 

 Order PALAEACANTHOCEPHALA 



Polymorphus; Filicollis; Gorgorhynchus; 



Echinorhynchus 

 Order EO ACANTHOCEPHALA 



Quadrigynis; Neoechinorhynchus; Octospinifer 



Phylum ENTOPROCTA 

 (=Endoprocta, Calyssozoa, Kamptozoa, 

 PoLYZOA Endoprocta, Polyzoa Entoprocta) 



Family LOXOSOMATIDAE 



Loxosoma; Loxocalyx 

 Family PEDICELLEVTOAE 



Pedicellina; Myosoma; Barentsia 

 Family URNATELLIDAE 



Urnatella 



Phylum POLYZOA 

 ( = Bryozoa, Polyzoa Ectoprocta, Ectoprocta) 



Class PHYLACTOLAEMATA 



( = LoPHOPOD a) Cristatella ; PI urnatella (=A Icyonella) 



Class GYMNOLAEMATA 



( = Stelmatopoda) Order CYCLOSTOMATA^ 



( = Stenolaemata, Stenostomata, - Trepostomata*) 

 Crisia; Diplosolen; Hornera; Lichenopora; 

 Tubulipora 

 Order CHEILOSTOMATA 



Bugiila; Caber ea; Cryptosula; Flustra; 

 ( = Eurystomata) -! Membranipora ; Schizoporella ; Scrupocellaria 



Order CTENOSTOMATA 

 L Alcyonidium; Bowerbankia; Triticella 



Phylum PHORONroA 



Phoronis; Phoronopsis 



" See Marsipobranchii, p. 35. 

 ' The Trepostomata are extinct. 



