CTENOPHORA-PLATYHELMINTHES 13 



Class NUDA^ 



Order BEROIDA 

 Beroe 



Phylum PLATYHELMINTHES (flatworms)^ 



Class TURBELLARIA (turbellarians) 



Order ACOELA' 



Aphanostoma; Convoluta 

 Order RHABDOCOELA 



Catenula; Macrostomum; Dalyellia; Gyratrix; 

 Paravortex 

 Order ALLOEOCOELA 



Hofstenia; Plagiostomum; Otomesostoma; 

 Monocelis 

 Order TRICLADIDA 

 Sub-order Maricola 



Bdelloura; Uteriporus; Procerodes ( = Gunda) 

 Sub-order Paludicola 



Planaha; Dugesia {= Euplanaria) ; Dendrocoelum 

 Sub-order Terricola 



Geoplana; Rhynchodemus; Bipalium 

 Order POLYCLADIDA 

 Sub-order Acotylea 



Stylochus; Notoplana; Cestoplana 

 Sub-order Cotylea 



Thysanozoon; Eurylepta; Prosthiostomum 



Class TEMNOCEPHALOroEA 



Class MONOGENEA 

 ( =Heterocotylea) 



Order TEMNOCEPHALIDEA 



( = Dactylifera, Dactyloda) 

 Temnocephala 



Sub-class MONOPISTHOCOTYLEA 



Order CAPSALOIDEA 



Tristoma; Capsala 

 Order UDONELLOIDEA 



Udonella 

 Order GYRODACTYLOroEA 



Gyrodactylus ; Dactylogyrus 

 Order ACANTHOCOTYLOroEA 



Acanthocotyle 

 Order PROTOGYRODACTYLOroEA 



Protogyrodactylus 

 Sub-class POLYOPISTHOCOTYLEA 



Order CHIMAEROCOLOIDEA 



Callorhynchicola 

 Order DICLroOPHOROIDEA 



Diplozoon; Hexostoma; Mazocraes; Microcotyte; 



Gastrocotyle ; DicUdophora; Discocotyle 

 * Sec Parazoa, p. 9. * Classification by Baer. ^ See Opisthobranchia, p. 22. 



