SYSTEMATIC SURVEY. 



97 



the Protozoa into naked and corticate forms (Gymnomyxa and Corticata). 

 The Gymnomyxa include the primitive forms and the Rhizopods ; the 

 Corticata include the two extremes — Gregarines and Infusorians. 



(Corticata.) 



Predominantly 

 ciliated and 



active. 

 Infusorians. 



Classification of Protozoa. 

 (Gymnomyxa. ) 



Predominantly 

 amoeboid. 



Rhizopods. 



(Corticata.) 



Predominantly 

 encysted and 



passive. 

 Sporozoa. 



ACINETARIA. 



RADIOLARIA. 



CI LI AT A. 



RhynchoflagellataI 



DlNOFLAGELLATA. 



FLAGELLATA. 



FORAMINIFERA. 

 Labyrinthulidea. 



Heliozoa. 



LOBOSA. 



SPOROZOA 



GREGARINIDA. 



Proteomyxa and Mycetozoa. 

 Primitive Forms. 



Systematic Survey. 



A. Primitive forms. — Under this heading may be included (i) 

 the Proteomyxa, primitive, insufficiently known forms often without a 



Fig. 42. — Diagram of Protomyxa aurantiaca. — After Haeckel. 



1. Encysted ; 2. Dividing into spores ; 3. Escape of spores, at first 

 flagellate, then amoeboid ; 4. Plasmodium, formed from fusion of 

 small amcebce. 



nucleus, and (2) the Mycetozoa, organisms with somewhat complex 

 fructifications, often classed as plants allied to Fungi. As examples of 



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