in PHYLUM AND CLASS PORIFERA 117 



also amoeboid zooicls similar to the amoeboid wand* ring- cells of 

 Sponges. 



But, while the Porifera are clearly Metazoa, and not Protozoa, 

 there is some room for difference of opinion as regards i licit- 

 relationships to the Coelenterata, with which great type they are 

 sometimes amalgamated. The reasons for and against such an 

 arrangement will be discussed in considering the general relation- 

 ships of the Coelenterata. 



