22 



3. The Parasitic Gregarine Type. A thick cuticle. No 

 special structures (in the adult phase) for locomotion, 

 ingestion and digestion of food. Encystation and the 

 formation of tough- coated spores are characteristic of 

 Gregarines. 



4. The Infusorian or Ciliate Type. A cuticle and numerous 

 small vibratile cilia for active locomotion and for securing 

 food. A definite mouth and a gullet, and specialised 

 nuclei. The more complex nature of the cell distinguishes 

 the ciliate Infusorians as the highest group of Protozoa. 



The amoeboid, the flagellate or ciliate, and the encysted 

 types may, and often do, occur in the life- history of one 

 species. 



The parasitic Protozoa are of great importance in re- 

 lation to disease in man and the lower animals. 



Name some Examples of Protozoa, and state where each is 

 found. 



Fuligo ( '* Flowers of Tan " ) A yellow plasmodium upon bark 



in tan-yards. 



Amoeba ... ... Some species frequent the . mud 



of ponds ; others are found 

 amongst wet Sphagnum moss. 



Entamoeba A parasitic Amoeba, of the in- 

 testine of Man. 



Olobigerina One of the marine Foraminifera. 



Floating on the surface of the 

 sea. 



Thalaasicolln A Radiolarian. Occurs in swarms 



floating at the surface in the 

 warmer waters of the great 

 oceans. 



Euglena 



A commonFlagellate which swarms 

 in stagnant puddles and ditches 

 forming a green scum on the 

 surface. 



