96 PROTOZOA. 



{b) Infusorians, — which are predominantly ciliated. They 



exhibit ascendant activity. 

 {c) Gregarines, — which are predominantly encysted, and 

 have no locomotor processes. They illustrate pre- 

 dominant passivity. 

 It is also important to notice Ray Lankester's division 

 of the Protozoa into naked and clothed forms (Gymnomyxa 

 and Corticata), the latter with the unit enclosed in a definite 

 rind, the former with the living matter unensheathed. The 

 Gymnomyxa include the primitive forms, and the Rhizopods ; 

 the Corticata include the two extremes — Gregarines and 

 Infusorians. 



CLASSIFICATION OF PROTOZOA. 



(Corticata.) (Gymnomyxa.) (Corticata.) 



Predominantly 



lashed and 



active. 



INFUSORIANS. 



Predominantly 

 amoeboid. 



RHIZOPODS. 



Predominantly 

 encysted and 

 passive. 

 f GREGARINIDS. 



ACINETARIA. 



RADIOLARIA. 



CILIATA. 

 Rhynchoflagellata\ 



DiNOFLAGELLATA. 



FLAGELLATA. 



FORAMINIFERA. 

 Labyrinthujlidea. 



Heliozoa. 



LOBOSA. 



GREGARINIDA 



or 



SPOROZOA. 



Proteomyxa and Mycetozoa. 

 Primitive Forms. 



