PROTOZOA : INFUSORIA. 73 



Protozoa, as is maintained by some modern observers, then 

 the entire sub -kingdom of the Protozoa would contain only 

 the Gregarinida, Amcebea, Foraminifera, and Radiolaria. At 

 present, however, there certainly do not appear to be suffi- 

 ciently decisive grounds for such a step, and the affinities of 

 the Spongida are certainly more intimate with the typical 

 Rhizopods than with the Cxlmterata. 



