'i02 ^ ^^ ^ ^ ^ ^ - ^ . ^ PROTOZOA, 



The last class is that of the Sporozoa, the members of 

 which are endoparasitic. Gregarlna is a type of the class. 

 They are found in nearly all the higher animals. Mono- 

 cystis is found in the seminal vesicles of the earthworm 

 and has a simpler body than Gregarina. The young are 

 intra-cellular parasites within the sperm cells. 



The Coccidia are small Sporozoa of simple structure 

 which occur commonly in the liver of the rabbit and 

 elsewhere. They may give rise to tumours and serious 

 pathological results. 



SUB-KINGDOM PROTOZOA. 



1. Unicellular or when multicellular the units are not mutually dependent. 



2. No true sexual reproduction, asexual by binary or multiple fission, preceded 



by conjugation. 



3. Mostly minute, marine or freshwater. 



Phylum I.— Gymnomyxa. Phylum II.— Corticata. 



Naked protoplasm with no 

 definite shape to body. 



cortex with definite 

 shape to body. 



Class I. — Rhizopoda. 

 Type — A moeba. 



1. Locomotion by pseudo- 



podia. 



2. No localised mouth, 



diffuse ingestion. 



3. Many have a chambered, 



calcareous, siliceous, or 

 arenaceous shell. 



4. Reproduction mainly by 



binary fission. 



5. Floating or creeping, 

 marine or freshwater. 



Class II. — CiLIATA. 



Types — ParamoeciuiJi ; 



Vorticella. 



Locomotion by cilia or 



flagella. 

 Localised mouth. 



No shell. 



Reproduction usually by 

 binary fission. 



Active, moving or seden- 

 tary, freshwater or 

 marine. 



Class III.— Sporozoa. 

 Type — Gregarina. 



Little or no locomotion. 

 Hooks for fixation. 



No mouth nor solid in- 

 gestion. 



No shell. 



Reproduction by multiple 

 fission with coated 

 spores. 



Endoparasitic. 



