458 



TMH EVOLUTION OF THE METAZOA 



a general genealogical tree (Fig. 60). The follow ing special 

 characteristics can be mentioned as typical of our construction 

 if compared with the numerous other similar attemps: 



Chordonia 



OUgomeria 



Polymeria 



Amena 



Parazoa 



Protozoa 



Fig. 60. Genealogical tree of the entire animal kingdom; the 

 monograms used in these diagrams are explained in the list of 

 phyla and classes (see p. 460-61) 



(1) Our genealogical tree begins with the animal Flagellata 

 which evolved on the one hand into the Rhizopoda, Sporozoa, 

 and the Ciliata, as well as (by way of the Choanoflagellata) 

 into the Parazoa (Spongiaria), and on the other hand (by way 

 of the Ciliata) into the Eumetazoa. The Parazoa evolved as 

 individualized colonies of the Choanoflagellata. 



