PROTOZOA 



CORTICATA. 



ClLIATA. 



i. (a) View of a Paramcecium mounted in gum to restrict movement. The animal is easily 

 visible to the naked eye, if black paper be used as a background, (b} Various phases in the 

 disappearance and reforming of the contractile vacuole. (<:) Paramcecium stained by irrigation with 

 methylene blue, (d) Fed with indian ink. Watch the rotation of the food vacuoles, the entrance of 

 the ink masses into the endoplasm, and their extrusion from the temporary anus. 



Long adoral cilia, cilia, ectoplasm, endoplasm ; food vacuoles ; outer part of ectoplasm with 

 trichocysts ; contractile vacuoles (two) in diastole ; same in systole ; vestibule ; ossophagus ; position of 

 anus ; macronucleus ; micronucleus. (Chlorophyll grains are present in some species.) 



