9 



FLAGELLATA. 



PROTOZOA 



i. Polytoma uvella. Smear a drop of the fluid over the slide and examine the drying edges, 

 where the animals will be more or less still, fl. flagella ; c. v. contractile vacuoles ; n. nucleus. 

 Look for forms undergoing fission. 

 Add iodine. The flagella are seen more distinctly. 



2. Euglena viridis. Gullet, pigment spot, flagellum, contractile vacuole, nucleus. 

 Kill with iodine. 



