THE NEW GENEALOGICAL TREE 



465 



Chordonia 



Hemichordaia 



Echinodermaia 



Brachiopoda 



ENTEROCOELA ^CHIZOCOELA 



EUCOELOMATA 



\l / ACOELOMATA 



PRIMITIVE ACOEL? 



\ 



I 

 BILATERIA 



FSEUDOCOELOMATA 



Arfhropoda 



^Onychophora 



Annelida 

 ■—Echiuroidea 



Aschelminthes 

 Acanthocephala 



Nemertinea 

 Plafyhelminthes 



Ctenophora 

 ■ Coelenlerafa 



RADIATA 



PLANULA-LIKE FORM F 



I 



EUMETAZOA 



Flagellota 



PARAZOA (Porifera) 

 -ME50Z0A 

 Other Protozoa 



Fig. 62. Genealogical tree constructed by M.J. Guthrie and J.M. 

 ^aderson, following the ideas of Hyman. 



