106 PHYLUM PROTOZOA -.THE SIMPLEST ANIMALS. 



and attacking the lining epithelium recommence the life 

 history. 



GENERAL CLASSIFICATION OF PROTOZOA 



Since the Protozoa are unicellular organisms (except the 

 few which form loose colonies), their classification should 

 be harmonious with that of the cells in a higher animal. 

 This is so. Thus (a) the Rhizopods, in which the living 

 matter flows out in changeful threads or "pseudopodia," as 



(COfcTICATA.) 



Predominantly 

 ciliated and 



active. 

 INFUSORIANS. 



CLASSIFICATION OF PROTOZOA 



(GYMNOMYXA.) 



Predominantly 

 amoeboid. 



RHIZOPODS. 



(CORTICATA.) 



Predominantly 

 encysted and 



passive. 

 SPOROZOA. 



ACINETARIA. 



RADIOLARIA. 



CILIATA. 



RHYNCHOFLAGELLATA) 



DlNOFLAGELLATA. 



FLAGELLATA. 



FORAMINIFERA. 

 LABYRINTHULIDEA. 



HELIOZOA. 



LOBOSA. 



G SPOROZOA 

 OR 

 REGARINES. 



PROTEOMYXA and MYCETOZOA. 

 PRIMITIVE FORMS. 



in the common Amoeba, are comparable with the white 

 blood corpuscles or leucocytes, many young ova, and other 

 "amoeboid" cells of higher animals; (b) the Infusorians, 

 which have a definite rind and bear motile lashes (cilia 

 or flagella), e.g. the common Paramcedum, may be likened 

 to the cells of ciliated epithelium, or to the active sperma- 

 tozoa of higher animals ; (c) the parasitic Sporozoa, which 



